/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-MCRwithDepranks-BasicCegarLoop.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-10 02:51:12,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-10 02:51:12,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-10 02:51:12,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-10 02:51:12,576 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-MCRwithDepranks-BasicCegarLoop.epf [2022-02-10 02:51:12,600 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-10 02:51:12,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-10 02:51:12,601 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-10 02:51:12,601 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-10 02:51:12,601 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-10 02:51:12,601 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-10 02:51:12,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-10 02:51:12,602 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-10 02:51:12,602 INFO L138 SettingsManager]: * Use SBE=true [2022-02-10 02:51:12,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-10 02:51:12,603 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-10 02:51:12,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-10 02:51:12,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-10 02:51:12,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-10 02:51:12,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-10 02:51:12,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-10 02:51:12,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-10 02:51:12,603 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-10 02:51:12,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-10 02:51:12,603 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-10 02:51:12,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-10 02:51:12,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-10 02:51:12,604 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-10 02:51:12,604 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-10 02:51:12,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-10 02:51:12,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 02:51:12,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-10 02:51:12,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-10 02:51:12,605 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-10 02:51:12,605 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-10 02:51:12,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-10 02:51:12,605 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-10 02:51:12,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-10 02:51:12,605 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-10 02:51:12,605 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-10 02:51:12,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-10 02:51:12,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-10 02:51:12,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-10 02:51:12,803 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-10 02:51:12,804 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-10 02:51:12,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl [2022-02-10 02:51:12,805 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-3.wvr.bpl' [2022-02-10 02:51:12,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-10 02:51:12,827 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-10 02:51:12,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-10 02:51:12,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-10 02:51:12,828 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-10 02:51:12,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:51:12" (1/1) ... [2022-02-10 02:51:12,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:51:12" (1/1) ... [2022-02-10 02:51:12,846 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-10 02:51:12,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-10 02:51:12,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-10 02:51:12,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-10 02:51:12,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-10 02:51:12,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:51:12" (1/1) ... [2022-02-10 02:51:12,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:51:12" (1/1) ... [2022-02-10 02:51:12,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:51:12" (1/1) ... [2022-02-10 02:51:12,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:51:12" (1/1) ... [2022-02-10 02:51:12,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:51:12" (1/1) ... [2022-02-10 02:51:12,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:51:12" (1/1) ... [2022-02-10 02:51:12,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:51:12" (1/1) ... [2022-02-10 02:51:12,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-10 02:51:12,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-10 02:51:12,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-10 02:51:12,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-10 02:51:12,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:51:12" (1/1) ... [2022-02-10 02:51:12,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 02:51:12,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:12,909 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-10 02:51:12,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-10 02:51:12,937 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-10 02:51:12,937 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-10 02:51:12,937 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-10 02:51:12,937 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-10 02:51:12,937 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-10 02:51:12,937 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-10 02:51:12,937 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-10 02:51:12,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-10 02:51:12,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-10 02:51:12,938 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-10 02:51:12,989 INFO L234 CfgBuilder]: Building ICFG [2022-02-10 02:51:12,990 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-10 02:51:13,071 INFO L275 CfgBuilder]: Performing block encoding [2022-02-10 02:51:13,123 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-10 02:51:13,124 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-10 02:51:13,125 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-02-10 02:51:13,126 INFO L202 PluginConnector]: Adding new model unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 02:51:13 BoogieIcfgContainer [2022-02-10 02:51:13,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-10 02:51:13,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-10 02:51:13,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-10 02:51:13,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-10 02:51:13,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 02:51:12" (1/2) ... [2022-02-10 02:51:13,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c96e99 and model type unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.02 02:51:13, skipping insertion in model container [2022-02-10 02:51:13,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 02:51:13" (2/2) ... [2022-02-10 02:51:13,136 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.bpl [2022-02-10 02:51:13,140 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-10 02:51:13,140 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-10 02:51:13,140 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-10 02:51:13,141 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-10 02:51:13,181 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-10 02:51:13,223 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-10 02:51:13,230 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-10 02:51:13,230 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-10 02:51:13,237 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2022-02-10 02:51:13,250 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 16 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) [2022-02-10 02:51:13,322 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 227 transitions and produced 141 states. [2022-02-10 02:51:13,329 INFO L276 IsEmpty]: Start isEmpty. Operand has 141 states, 96 states have (on average 1.7916666666666667) internal successors, (172), 140 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:13,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-02-10 02:51:13,338 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:13,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:13,339 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:13,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:13,343 INFO L85 PathProgramCache]: Analyzing trace with hash 519320593, now seen corresponding path program 1 times [2022-02-10 02:51:13,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:13,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164603625] [2022-02-10 02:51:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:13,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:13,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:13,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:13,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164603625] [2022-02-10 02:51:13,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164603625] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 02:51:13,578 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 02:51:13,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-10 02:51:13,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574457550] [2022-02-10 02:51:13,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 02:51:13,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 02:51:13,582 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:13,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 02:51:13,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-10 02:51:13,630 INFO L87 Difference]: Start difference. First operand has 141 states, 96 states have (on average 1.7916666666666667) internal successors, (172), 140 states have internal predecessors, (172), 0 states have call successors, (0), 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 5 states, 5 states have (on average 2.0) 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) [2022-02-10 02:51:13,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:13,713 INFO L93 Difference]: Finished difference Result 130 states and 160 transitions. [2022-02-10 02:51:13,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-10 02:51:13,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) 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 [2022-02-10 02:51:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:13,733 INFO L225 Difference]: With dead ends: 130 [2022-02-10 02:51:13,733 INFO L226 Difference]: Without dead ends: 91 [2022-02-10 02:51:13,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-02-10 02:51:13,736 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:13,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 11 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:51:13,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-10 02:51:13,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 13. [2022-02-10 02:51:13,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:13,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2022-02-10 02:51:13,758 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 19 transitions. Word has length 10 [2022-02-10 02:51:13,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:13,759 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 19 transitions. [2022-02-10 02:51:13,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) 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) [2022-02-10 02:51:13,759 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 19 transitions. [2022-02-10 02:51:13,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-02-10 02:51:13,759 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:13,759 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:13,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-10 02:51:13,760 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:13,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:13,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2057897643, now seen corresponding path program 2 times [2022-02-10 02:51:13,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:13,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445652791] [2022-02-10 02:51:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:13,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:13,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:13,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445652791] [2022-02-10 02:51:13,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445652791] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 02:51:13,819 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 02:51:13,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-10 02:51:13,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809880054] [2022-02-10 02:51:13,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 02:51:13,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 02:51:13,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:13,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 02:51:13,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-10 02:51:13,821 INFO L87 Difference]: Start difference. First operand 13 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.0) 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) [2022-02-10 02:51:13,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:13,886 INFO L93 Difference]: Finished difference Result 20 states and 30 transitions. [2022-02-10 02:51:13,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 02:51:13,887 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) 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 [2022-02-10 02:51:13,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:13,888 INFO L225 Difference]: With dead ends: 20 [2022-02-10 02:51:13,888 INFO L226 Difference]: Without dead ends: 16 [2022-02-10 02:51:13,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-10 02:51:13,889 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:13,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:51:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-10 02:51:13,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2022-02-10 02:51:13,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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) [2022-02-10 02:51:13,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2022-02-10 02:51:13,891 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 20 transitions. Word has length 10 [2022-02-10 02:51:13,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:13,892 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 20 transitions. [2022-02-10 02:51:13,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) 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) [2022-02-10 02:51:13,892 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 20 transitions. [2022-02-10 02:51:13,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-10 02:51:13,892 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:13,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:13,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-10 02:51:13,893 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:13,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:13,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1175011406, now seen corresponding path program 1 times [2022-02-10 02:51:13,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:13,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11098082] [2022-02-10 02:51:13,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:13,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:13,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:13,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11098082] [2022-02-10 02:51:13,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11098082] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:13,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381593438] [2022-02-10 02:51:13,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:13,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:13,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:13,997 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:14,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-10 02:51:14,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-10 02:51:14,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:14,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-10 02:51:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:14,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:14,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:14,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 62 [2022-02-10 02:51:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:14,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381593438] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:14,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:14,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-02-10 02:51:14,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868557441] [2022-02-10 02:51:14,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:14,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-10 02:51:14,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:14,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-10 02:51:14,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-02-10 02:51:14,682 INFO L87 Difference]: Start difference. First operand 14 states and 20 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2022-02-10 02:51:14,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:14,797 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2022-02-10 02:51:14,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-10 02:51:14,797 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 11 [2022-02-10 02:51:14,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:14,798 INFO L225 Difference]: With dead ends: 29 [2022-02-10 02:51:14,798 INFO L226 Difference]: Without dead ends: 24 [2022-02-10 02:51:14,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-02-10 02:51:14,799 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:14,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 15 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:51:14,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-10 02:51:14,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2022-02-10 02:51:14,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 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) [2022-02-10 02:51:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 28 transitions. [2022-02-10 02:51:14,803 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 28 transitions. Word has length 11 [2022-02-10 02:51:14,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:14,803 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 28 transitions. [2022-02-10 02:51:14,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2022-02-10 02:51:14,804 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 28 transitions. [2022-02-10 02:51:14,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-10 02:51:14,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:14,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:14,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-10 02:51:15,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:15,020 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:15,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:15,020 INFO L85 PathProgramCache]: Analyzing trace with hash 542737654, now seen corresponding path program 2 times [2022-02-10 02:51:15,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:15,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915512339] [2022-02-10 02:51:15,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:15,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:15,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:15,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915512339] [2022-02-10 02:51:15,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915512339] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:15,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781134292] [2022-02-10 02:51:15,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 02:51:15,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:15,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:15,096 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:15,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-10 02:51:15,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 02:51:15,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:51:15,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-10 02:51:15,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:15,263 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:15,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 31 [2022-02-10 02:51:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:15,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:15,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:15,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 62 [2022-02-10 02:51:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:15,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781134292] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:15,535 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:15,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-02-10 02:51:15,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338141523] [2022-02-10 02:51:15,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:15,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 02:51:15,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:15,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 02:51:15,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-02-10 02:51:15,539 INFO L87 Difference]: Start difference. First operand 17 states and 28 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:15,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:15,741 INFO L93 Difference]: Finished difference Result 29 states and 43 transitions. [2022-02-10 02:51:15,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-10 02:51:15,741 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2022-02-10 02:51:15,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:15,742 INFO L225 Difference]: With dead ends: 29 [2022-02-10 02:51:15,742 INFO L226 Difference]: Without dead ends: 21 [2022-02-10 02:51:15,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-02-10 02:51:15,749 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:15,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 16 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:51:15,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-02-10 02:51:15,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2022-02-10 02:51:15,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 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) [2022-02-10 02:51:15,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 28 transitions. [2022-02-10 02:51:15,758 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 28 transitions. Word has length 11 [2022-02-10 02:51:15,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:15,758 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 28 transitions. [2022-02-10 02:51:15,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:15,759 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 28 transitions. [2022-02-10 02:51:15,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-10 02:51:15,759 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:15,759 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:15,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-10 02:51:15,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-10 02:51:15,976 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:15,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:15,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1398044308, now seen corresponding path program 3 times [2022-02-10 02:51:15,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:15,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24956303] [2022-02-10 02:51:15,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:15,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:16,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:16,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:16,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24956303] [2022-02-10 02:51:16,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24956303] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:16,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134415971] [2022-02-10 02:51:16,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 02:51:16,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:16,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:16,048 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:16,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-10 02:51:16,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:51:16,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-10 02:51:16,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:16,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-10 02:51:16,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:16,183 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 31 [2022-02-10 02:51:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:16,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:16,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:16,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 68 [2022-02-10 02:51:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:16,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134415971] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:16,444 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:16,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-02-10 02:51:16,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344084799] [2022-02-10 02:51:16,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:16,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-10 02:51:16,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:16,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-10 02:51:16,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-02-10 02:51:16,446 INFO L87 Difference]: Start difference. First operand 17 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:16,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:16,565 INFO L93 Difference]: Finished difference Result 39 states and 57 transitions. [2022-02-10 02:51:16,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 02:51:16,565 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2022-02-10 02:51:16,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:16,567 INFO L225 Difference]: With dead ends: 39 [2022-02-10 02:51:16,567 INFO L226 Difference]: Without dead ends: 31 [2022-02-10 02:51:16,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-02-10 02:51:16,568 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:16,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 14 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:51:16,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-10 02:51:16,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2022-02-10 02:51:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:16,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 30 transitions. [2022-02-10 02:51:16,575 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 30 transitions. Word has length 11 [2022-02-10 02:51:16,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:16,575 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 30 transitions. [2022-02-10 02:51:16,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:16,575 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 30 transitions. [2022-02-10 02:51:16,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-10 02:51:16,576 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:16,576 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:16,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-10 02:51:16,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:16,790 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:16,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:16,790 INFO L85 PathProgramCache]: Analyzing trace with hash 2135271473, now seen corresponding path program 4 times [2022-02-10 02:51:16,790 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:16,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208509648] [2022-02-10 02:51:16,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:16,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:16,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:16,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208509648] [2022-02-10 02:51:16,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208509648] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:16,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958780395] [2022-02-10 02:51:16,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 02:51:16,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:16,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:16,872 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:16,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-10 02:51:16,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 02:51:16,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:51:16,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-10 02:51:16,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:17,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:17,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 48 [2022-02-10 02:51:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:17,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:17,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:17,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 77 [2022-02-10 02:51:17,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:17,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958780395] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:17,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:17,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-02-10 02:51:17,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366719177] [2022-02-10 02:51:17,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:17,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 02:51:17,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:17,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 02:51:17,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-10 02:51:17,490 INFO L87 Difference]: Start difference. First operand 19 states and 30 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:17,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:17,631 INFO L93 Difference]: Finished difference Result 26 states and 41 transitions. [2022-02-10 02:51:17,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-10 02:51:17,631 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 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 12 [2022-02-10 02:51:17,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:17,631 INFO L225 Difference]: With dead ends: 26 [2022-02-10 02:51:17,632 INFO L226 Difference]: Without dead ends: 22 [2022-02-10 02:51:17,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-02-10 02:51:17,632 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:17,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 20 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:51:17,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-02-10 02:51:17,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2022-02-10 02:51:17,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:17,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 30 transitions. [2022-02-10 02:51:17,635 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 30 transitions. Word has length 12 [2022-02-10 02:51:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:17,635 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 30 transitions. [2022-02-10 02:51:17,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:17,636 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 30 transitions. [2022-02-10 02:51:17,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-10 02:51:17,636 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:17,636 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:17,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-10 02:51:17,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:17,847 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:17,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:17,848 INFO L85 PathProgramCache]: Analyzing trace with hash 413359891, now seen corresponding path program 5 times [2022-02-10 02:51:17,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:17,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040141136] [2022-02-10 02:51:17,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:17,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:17,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:17,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040141136] [2022-02-10 02:51:17,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040141136] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:17,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067361493] [2022-02-10 02:51:17,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 02:51:17,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:17,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:17,909 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:17,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-10 02:51:17,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 02:51:17,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:51:17,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-10 02:51:17,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:18,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:18,048 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2022-02-10 02:51:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:18,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:18,153 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:18,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 77 [2022-02-10 02:51:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:18,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067361493] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:18,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:18,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-02-10 02:51:18,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199747586] [2022-02-10 02:51:18,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:18,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-10 02:51:18,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:18,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-10 02:51:18,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-10 02:51:18,323 INFO L87 Difference]: Start difference. First operand 19 states and 30 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:18,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:18,381 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2022-02-10 02:51:18,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-10 02:51:18,382 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 12 [2022-02-10 02:51:18,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:18,383 INFO L225 Difference]: With dead ends: 32 [2022-02-10 02:51:18,383 INFO L226 Difference]: Without dead ends: 28 [2022-02-10 02:51:18,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-02-10 02:51:18,384 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:18,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 22 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:51:18,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-10 02:51:18,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2022-02-10 02:51:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 30 transitions. [2022-02-10 02:51:18,388 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 30 transitions. Word has length 12 [2022-02-10 02:51:18,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:18,388 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 30 transitions. [2022-02-10 02:51:18,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:18,389 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 30 transitions. [2022-02-10 02:51:18,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-10 02:51:18,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:18,389 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:18,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-10 02:51:18,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:18,606 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:18,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:18,606 INFO L85 PathProgramCache]: Analyzing trace with hash -559936745, now seen corresponding path program 1 times [2022-02-10 02:51:18,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:18,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157009756] [2022-02-10 02:51:18,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:18,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:18,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 02:51:18,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:18,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157009756] [2022-02-10 02:51:18,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157009756] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 02:51:18,627 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 02:51:18,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-10 02:51:18,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178605755] [2022-02-10 02:51:18,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 02:51:18,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-10 02:51:18,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:18,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-10 02:51:18,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-10 02:51:18,628 INFO L87 Difference]: Start difference. First operand 19 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.0) 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) [2022-02-10 02:51:18,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:18,653 INFO L93 Difference]: Finished difference Result 23 states and 38 transitions. [2022-02-10 02:51:18,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-10 02:51:18,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) 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 [2022-02-10 02:51:18,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:18,653 INFO L225 Difference]: With dead ends: 23 [2022-02-10 02:51:18,653 INFO L226 Difference]: Without dead ends: 23 [2022-02-10 02:51:18,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-10 02:51:18,654 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:18,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:51:18,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-10 02:51:18,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-02-10 02:51:18,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:18,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 33 transitions. [2022-02-10 02:51:18,656 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 33 transitions. Word has length 12 [2022-02-10 02:51:18,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:18,656 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 33 transitions. [2022-02-10 02:51:18,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) 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) [2022-02-10 02:51:18,656 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 33 transitions. [2022-02-10 02:51:18,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-10 02:51:18,656 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:18,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:18,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-10 02:51:18,656 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:18,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1479637453, now seen corresponding path program 1 times [2022-02-10 02:51:18,657 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:18,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866827100] [2022-02-10 02:51:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:18,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:18,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:18,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:18,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866827100] [2022-02-10 02:51:18,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866827100] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:18,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185896020] [2022-02-10 02:51:18,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:18,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:18,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:18,689 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:18,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-10 02:51:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:18,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-10 02:51:18,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:18,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:18,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185896020] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:18,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:18,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-02-10 02:51:18,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182733556] [2022-02-10 02:51:18,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:18,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-10 02:51:18,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:18,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-10 02:51:18,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-02-10 02:51:18,777 INFO L87 Difference]: Start difference. First operand 20 states and 33 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:18,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:18,851 INFO L93 Difference]: Finished difference Result 41 states and 66 transitions. [2022-02-10 02:51:18,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 02:51:18,851 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 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 12 [2022-02-10 02:51:18,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:18,851 INFO L225 Difference]: With dead ends: 41 [2022-02-10 02:51:18,852 INFO L226 Difference]: Without dead ends: 41 [2022-02-10 02:51:18,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-02-10 02:51:18,852 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:18,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 37 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:51:18,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-10 02:51:18,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2022-02-10 02:51:18,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2022-02-10 02:51:18,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 45 transitions. [2022-02-10 02:51:18,854 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 45 transitions. Word has length 12 [2022-02-10 02:51:18,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:18,854 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 45 transitions. [2022-02-10 02:51:18,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:18,855 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 45 transitions. [2022-02-10 02:51:18,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 02:51:18,855 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:18,855 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:18,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-10 02:51:19,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:19,072 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:19,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:19,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1700440970, now seen corresponding path program 2 times [2022-02-10 02:51:19,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:19,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502053263] [2022-02-10 02:51:19,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:19,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:19,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:19,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502053263] [2022-02-10 02:51:19,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502053263] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:19,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284045897] [2022-02-10 02:51:19,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 02:51:19,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:19,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:19,127 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:19,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-10 02:51:19,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 02:51:19,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:51:19,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-10 02:51:19,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:19,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:19,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284045897] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:19,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:19,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-10 02:51:19,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054640240] [2022-02-10 02:51:19,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:19,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-10 02:51:19,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:19,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-10 02:51:19,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-10 02:51:19,210 INFO L87 Difference]: Start difference. First operand 24 states and 45 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:19,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:19,275 INFO L93 Difference]: Finished difference Result 55 states and 86 transitions. [2022-02-10 02:51:19,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 02:51:19,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-10 02:51:19,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:19,276 INFO L225 Difference]: With dead ends: 55 [2022-02-10 02:51:19,276 INFO L226 Difference]: Without dead ends: 54 [2022-02-10 02:51:19,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-02-10 02:51:19,277 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:19,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 22 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:51:19,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-10 02:51:19,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 28. [2022-02-10 02:51:19,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:19,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 59 transitions. [2022-02-10 02:51:19,281 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 59 transitions. Word has length 13 [2022-02-10 02:51:19,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:19,281 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 59 transitions. [2022-02-10 02:51:19,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:19,281 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 59 transitions. [2022-02-10 02:51:19,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 02:51:19,281 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:19,282 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:19,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-10 02:51:19,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:19,506 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:19,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:19,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1674825618, now seen corresponding path program 6 times [2022-02-10 02:51:19,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:19,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825765706] [2022-02-10 02:51:19,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:19,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:19,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:19,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825765706] [2022-02-10 02:51:19,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825765706] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:19,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409540241] [2022-02-10 02:51:19,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 02:51:19,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:19,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:19,551 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:19,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-10 02:51:19,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 02:51:19,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:51:19,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-10 02:51:19,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:19,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:19,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409540241] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:19,643 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:19,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-10 02:51:19,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824807379] [2022-02-10 02:51:19,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:19,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-10 02:51:19,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:19,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-10 02:51:19,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-10 02:51:19,646 INFO L87 Difference]: Start difference. First operand 28 states and 59 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:19,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:19,695 INFO L93 Difference]: Finished difference Result 52 states and 85 transitions. [2022-02-10 02:51:19,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-10 02:51:19,695 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-10 02:51:19,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:19,696 INFO L225 Difference]: With dead ends: 52 [2022-02-10 02:51:19,696 INFO L226 Difference]: Without dead ends: 52 [2022-02-10 02:51:19,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-10 02:51:19,697 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:19,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 31 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:51:19,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-10 02:51:19,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2022-02-10 02:51:19,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:19,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 63 transitions. [2022-02-10 02:51:19,699 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 63 transitions. Word has length 13 [2022-02-10 02:51:19,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:19,700 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 63 transitions. [2022-02-10 02:51:19,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:19,700 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 63 transitions. [2022-02-10 02:51:19,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 02:51:19,700 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:19,700 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:19,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-10 02:51:19,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-10 02:51:19,916 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:19,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:19,916 INFO L85 PathProgramCache]: Analyzing trace with hash -47085964, now seen corresponding path program 7 times [2022-02-10 02:51:19,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:19,917 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401544922] [2022-02-10 02:51:19,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:19,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:19,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:19,941 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:19,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401544922] [2022-02-10 02:51:19,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401544922] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:19,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996616379] [2022-02-10 02:51:19,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 02:51:19,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:19,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:19,943 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:19,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-10 02:51:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:19,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-10 02:51:19,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:19,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:20,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996616379] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:20,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:20,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-10 02:51:20,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977282674] [2022-02-10 02:51:20,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:20,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-10 02:51:20,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:20,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-10 02:51:20,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-10 02:51:20,024 INFO L87 Difference]: Start difference. First operand 30 states and 63 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:20,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:20,076 INFO L93 Difference]: Finished difference Result 38 states and 70 transitions. [2022-02-10 02:51:20,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-10 02:51:20,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-10 02:51:20,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:20,077 INFO L225 Difference]: With dead ends: 38 [2022-02-10 02:51:20,077 INFO L226 Difference]: Without dead ends: 37 [2022-02-10 02:51:20,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-10 02:51:20,078 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:20,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 16 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:51:20,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-10 02:51:20,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-02-10 02:51:20,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:20,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2022-02-10 02:51:20,080 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 13 [2022-02-10 02:51:20,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:20,080 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2022-02-10 02:51:20,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:20,080 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2022-02-10 02:51:20,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 02:51:20,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:20,081 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:20,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-10 02:51:20,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:20,282 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:20,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:20,282 INFO L85 PathProgramCache]: Analyzing trace with hash 865478992, now seen corresponding path program 3 times [2022-02-10 02:51:20,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:20,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986880425] [2022-02-10 02:51:20,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:20,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:20,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:20,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986880425] [2022-02-10 02:51:20,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986880425] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:20,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094287442] [2022-02-10 02:51:20,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 02:51:20,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:20,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:20,328 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:20,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-10 02:51:20,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-10 02:51:20,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:51:20,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-10 02:51:20,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:20,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:20,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094287442] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:20,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:20,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-10 02:51:20,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857965906] [2022-02-10 02:51:20,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:20,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-10 02:51:20,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:20,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-10 02:51:20,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-10 02:51:20,426 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:20,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:20,464 INFO L93 Difference]: Finished difference Result 50 states and 81 transitions. [2022-02-10 02:51:20,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-10 02:51:20,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-10 02:51:20,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:20,464 INFO L225 Difference]: With dead ends: 50 [2022-02-10 02:51:20,464 INFO L226 Difference]: Without dead ends: 50 [2022-02-10 02:51:20,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-10 02:51:20,465 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:20,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 25 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:51:20,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-10 02:51:20,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 29. [2022-02-10 02:51:20,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:20,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 58 transitions. [2022-02-10 02:51:20,467 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 58 transitions. Word has length 13 [2022-02-10 02:51:20,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:20,468 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 58 transitions. [2022-02-10 02:51:20,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:20,468 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 58 transitions. [2022-02-10 02:51:20,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 02:51:20,468 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:20,468 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:20,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-10 02:51:20,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-10 02:51:20,683 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:20,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:20,684 INFO L85 PathProgramCache]: Analyzing trace with hash 697616534, now seen corresponding path program 8 times [2022-02-10 02:51:20,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:20,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178952651] [2022-02-10 02:51:20,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:20,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:20,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:20,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178952651] [2022-02-10 02:51:20,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178952651] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:20,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883503375] [2022-02-10 02:51:20,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 02:51:20,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:20,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:20,718 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:20,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-10 02:51:20,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 02:51:20,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:51:20,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-10 02:51:20,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:20,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:20,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883503375] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:20,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:20,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-02-10 02:51:20,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173209103] [2022-02-10 02:51:20,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:20,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-10 02:51:20,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:20,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-10 02:51:20,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-10 02:51:20,808 INFO L87 Difference]: Start difference. First operand 29 states and 58 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:20,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:20,864 INFO L93 Difference]: Finished difference Result 38 states and 66 transitions. [2022-02-10 02:51:20,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-10 02:51:20,864 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-10 02:51:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:20,865 INFO L225 Difference]: With dead ends: 38 [2022-02-10 02:51:20,865 INFO L226 Difference]: Without dead ends: 36 [2022-02-10 02:51:20,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-02-10 02:51:20,866 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:20,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:51:20,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-10 02:51:20,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2022-02-10 02:51:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:20,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 57 transitions. [2022-02-10 02:51:20,870 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 57 transitions. Word has length 13 [2022-02-10 02:51:20,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:20,870 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 57 transitions. [2022-02-10 02:51:20,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:20,871 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 57 transitions. [2022-02-10 02:51:20,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-10 02:51:20,873 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:20,873 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:20,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-10 02:51:21,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-10 02:51:21,079 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:21,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:21,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1986409804, now seen corresponding path program 9 times [2022-02-10 02:51:21,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:21,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475765286] [2022-02-10 02:51:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:21,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:21,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:21,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475765286] [2022-02-10 02:51:21,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475765286] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 02:51:21,107 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 02:51:21,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-10 02:51:21,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548794652] [2022-02-10 02:51:21,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 02:51:21,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-10 02:51:21,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:21,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-10 02:51:21,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-10 02:51:21,108 INFO L87 Difference]: Start difference. First operand 29 states and 57 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:21,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:21,126 INFO L93 Difference]: Finished difference Result 32 states and 59 transitions. [2022-02-10 02:51:21,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-10 02:51:21,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-02-10 02:51:21,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:21,126 INFO L225 Difference]: With dead ends: 32 [2022-02-10 02:51:21,126 INFO L226 Difference]: Without dead ends: 29 [2022-02-10 02:51:21,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-10 02:51:21,127 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:21,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 7 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:51:21,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-10 02:51:21,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-02-10 02:51:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:21,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 56 transitions. [2022-02-10 02:51:21,129 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 56 transitions. Word has length 13 [2022-02-10 02:51:21,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:21,129 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 56 transitions. [2022-02-10 02:51:21,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:21,129 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 56 transitions. [2022-02-10 02:51:21,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 02:51:21,130 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:21,130 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:21,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-10 02:51:21,130 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:21,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:21,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1205606709, now seen corresponding path program 4 times [2022-02-10 02:51:21,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:21,130 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358287691] [2022-02-10 02:51:21,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:21,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:21,195 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:21,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358287691] [2022-02-10 02:51:21,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358287691] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:21,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513026368] [2022-02-10 02:51:21,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 02:51:21,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:21,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:21,196 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:21,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-10 02:51:21,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 02:51:21,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:51:21,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 02:51:21,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:21,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:21,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 129 [2022-02-10 02:51:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:21,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:21,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:21,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 39 treesize of output 202 [2022-02-10 02:51:23,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:23,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513026368] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:23,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:23,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-02-10 02:51:23,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6451062] [2022-02-10 02:51:23,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:23,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 02:51:23,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:23,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 02:51:23,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-10 02:51:23,058 INFO L87 Difference]: Start difference. First operand 29 states and 56 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:23,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:23,288 INFO L93 Difference]: Finished difference Result 48 states and 90 transitions. [2022-02-10 02:51:23,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 02:51:23,288 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) 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 14 [2022-02-10 02:51:23,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:23,289 INFO L225 Difference]: With dead ends: 48 [2022-02-10 02:51:23,289 INFO L226 Difference]: Without dead ends: 37 [2022-02-10 02:51:23,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-10 02:51:23,289 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:23,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 37 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 02:51:23,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-10 02:51:23,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2022-02-10 02:51:23,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:23,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 73 transitions. [2022-02-10 02:51:23,292 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 73 transitions. Word has length 14 [2022-02-10 02:51:23,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:23,292 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 73 transitions. [2022-02-10 02:51:23,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:23,292 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 73 transitions. [2022-02-10 02:51:23,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 02:51:23,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:23,292 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:23,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-10 02:51:23,499 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,SelfDestructingSolverStorable15 [2022-02-10 02:51:23,499 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:23,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:23,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1194308435, now seen corresponding path program 5 times [2022-02-10 02:51:23,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:23,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966188633] [2022-02-10 02:51:23,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:23,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:23,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:23,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966188633] [2022-02-10 02:51:23,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966188633] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:23,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503109903] [2022-02-10 02:51:23,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 02:51:23,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:23,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:23,574 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:23,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-10 02:51:23,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 02:51:23,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:51:23,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 02:51:23,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:23,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:23,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 129 [2022-02-10 02:51:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:24,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:24,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:24,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 39 treesize of output 202 [2022-02-10 02:51:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:25,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503109903] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:25,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:25,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-10 02:51:25,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047292599] [2022-02-10 02:51:25,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:25,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 02:51:25,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:25,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 02:51:25,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-10 02:51:25,299 INFO L87 Difference]: Start difference. First operand 34 states and 73 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:25,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:25,431 INFO L93 Difference]: Finished difference Result 56 states and 114 transitions. [2022-02-10 02:51:25,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 02:51:25,431 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-10 02:51:25,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:25,432 INFO L225 Difference]: With dead ends: 56 [2022-02-10 02:51:25,432 INFO L226 Difference]: Without dead ends: 48 [2022-02-10 02:51:25,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-02-10 02:51:25,432 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:25,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 23 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:51:25,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-10 02:51:25,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2022-02-10 02:51:25,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:25,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 73 transitions. [2022-02-10 02:51:25,434 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 73 transitions. Word has length 14 [2022-02-10 02:51:25,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:25,434 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 73 transitions. [2022-02-10 02:51:25,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:25,435 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 73 transitions. [2022-02-10 02:51:25,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 02:51:25,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:25,435 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:25,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-02-10 02:51:25,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-10 02:51:25,648 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:25,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:25,648 INFO L85 PathProgramCache]: Analyzing trace with hash 965964371, now seen corresponding path program 6 times [2022-02-10 02:51:25,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:25,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51158934] [2022-02-10 02:51:25,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:25,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:25,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:25,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51158934] [2022-02-10 02:51:25,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51158934] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:25,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101414197] [2022-02-10 02:51:25,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 02:51:25,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:25,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:25,740 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:25,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-10 02:51:25,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 02:51:25,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:51:25,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 02:51:25,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:25,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:25,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 129 [2022-02-10 02:51:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:26,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:26,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:26,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 39 treesize of output 202 [2022-02-10 02:51:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:29,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101414197] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:29,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:29,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-02-10 02:51:29,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099814962] [2022-02-10 02:51:29,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:29,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 02:51:29,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:29,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 02:51:29,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-10 02:51:29,289 INFO L87 Difference]: Start difference. First operand 34 states and 73 transitions. Second operand has 20 states, 20 states have (on average 1.6) 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) [2022-02-10 02:51:29,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:29,434 INFO L93 Difference]: Finished difference Result 55 states and 115 transitions. [2022-02-10 02:51:29,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 02:51:29,435 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) 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 14 [2022-02-10 02:51:29,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:29,435 INFO L225 Difference]: With dead ends: 55 [2022-02-10 02:51:29,435 INFO L226 Difference]: Without dead ends: 45 [2022-02-10 02:51:29,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-02-10 02:51:29,436 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 30 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:29,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 26 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:51:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-10 02:51:29,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2022-02-10 02:51:29,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.45) internal successors, (98), 40 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2022-02-10 02:51:29,438 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2022-02-10 02:51:29,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:29,438 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2022-02-10 02:51:29,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) 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) [2022-02-10 02:51:29,439 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2022-02-10 02:51:29,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 02:51:29,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:29,439 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:29,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-02-10 02:51:29,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:29,643 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:29,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:29,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1611253865, now seen corresponding path program 7 times [2022-02-10 02:51:29,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:29,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041273212] [2022-02-10 02:51:29,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:29,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:29,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:29,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:29,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041273212] [2022-02-10 02:51:29,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041273212] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:29,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162105509] [2022-02-10 02:51:29,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 02:51:29,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:29,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:29,731 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:29,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-10 02:51:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:29,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 02:51:29,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:29,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:29,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 129 [2022-02-10 02:51:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:30,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:30,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:30,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 39 treesize of output 202 [2022-02-10 02:51:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:34,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162105509] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:34,400 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:34,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-10 02:51:34,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188127692] [2022-02-10 02:51:34,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:34,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 02:51:34,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:34,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 02:51:34,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-10 02:51:34,401 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:34,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:34,580 INFO L93 Difference]: Finished difference Result 74 states and 146 transitions. [2022-02-10 02:51:34,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 02:51:34,585 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-10 02:51:34,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:34,585 INFO L225 Difference]: With dead ends: 74 [2022-02-10 02:51:34,586 INFO L226 Difference]: Without dead ends: 61 [2022-02-10 02:51:34,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-02-10 02:51:34,586 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 44 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:34,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 34 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:51:34,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-02-10 02:51:34,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 41. [2022-02-10 02:51:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.425) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:34,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2022-02-10 02:51:34,589 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 14 [2022-02-10 02:51:34,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:34,589 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2022-02-10 02:51:34,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:34,589 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2022-02-10 02:51:34,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 02:51:34,589 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:34,589 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:34,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-10 02:51:34,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:34,804 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:34,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:34,804 INFO L85 PathProgramCache]: Analyzing trace with hash -755947211, now seen corresponding path program 8 times [2022-02-10 02:51:34,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:34,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021381186] [2022-02-10 02:51:34,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:34,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:34,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:34,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021381186] [2022-02-10 02:51:34,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021381186] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:34,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715207067] [2022-02-10 02:51:34,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 02:51:34,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:34,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:34,892 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:34,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-10 02:51:34,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 02:51:34,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:51:34,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 02:51:34,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:35,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:35,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 114 [2022-02-10 02:51:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:35,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:35,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:35,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 39 treesize of output 202 [2022-02-10 02:51:39,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:39,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715207067] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:39,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:39,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-10 02:51:39,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245426488] [2022-02-10 02:51:39,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:39,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 02:51:39,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:39,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 02:51:39,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-02-10 02:51:39,616 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:39,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:39,808 INFO L93 Difference]: Finished difference Result 92 states and 177 transitions. [2022-02-10 02:51:39,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 02:51:39,809 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) 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 14 [2022-02-10 02:51:39,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:39,809 INFO L225 Difference]: With dead ends: 92 [2022-02-10 02:51:39,809 INFO L226 Difference]: Without dead ends: 79 [2022-02-10 02:51:39,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-02-10 02:51:39,810 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:39,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 43 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:51:39,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-10 02:51:39,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 42. [2022-02-10 02:51:39,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:39,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2022-02-10 02:51:39,813 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 14 [2022-02-10 02:51:39,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:39,813 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2022-02-10 02:51:39,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:39,813 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2022-02-10 02:51:39,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 02:51:39,814 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:39,814 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:39,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-02-10 02:51:40,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:40,031 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:40,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:40,031 INFO L85 PathProgramCache]: Analyzing trace with hash -107121009, now seen corresponding path program 9 times [2022-02-10 02:51:40,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:40,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6285611] [2022-02-10 02:51:40,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:40,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:40,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:40,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6285611] [2022-02-10 02:51:40,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6285611] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:40,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613716909] [2022-02-10 02:51:40,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 02:51:40,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:40,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:40,113 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:40,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-10 02:51:40,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 02:51:40,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:51:40,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 02:51:40,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:40,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:40,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 129 [2022-02-10 02:51:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:40,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:40,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:40,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 39 treesize of output 202 [2022-02-10 02:51:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:41,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613716909] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:41,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:41,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-02-10 02:51:41,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243673755] [2022-02-10 02:51:41,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:41,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 02:51:41,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:41,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 02:51:41,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-10 02:51:41,452 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand has 20 states, 20 states have (on average 1.6) 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) [2022-02-10 02:51:41,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:41,606 INFO L93 Difference]: Finished difference Result 62 states and 140 transitions. [2022-02-10 02:51:41,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 02:51:41,607 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) 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 14 [2022-02-10 02:51:41,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:41,607 INFO L225 Difference]: With dead ends: 62 [2022-02-10 02:51:41,607 INFO L226 Difference]: Without dead ends: 52 [2022-02-10 02:51:41,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-02-10 02:51:41,608 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 32 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:41,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 28 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:51:41,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-10 02:51:41,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2022-02-10 02:51:41,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.5833333333333335) internal successors, (124), 48 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:41,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 124 transitions. [2022-02-10 02:51:41,610 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 124 transitions. Word has length 14 [2022-02-10 02:51:41,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:41,610 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 124 transitions. [2022-02-10 02:51:41,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) 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) [2022-02-10 02:51:41,611 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 124 transitions. [2022-02-10 02:51:41,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 02:51:41,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:41,611 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:41,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-10 02:51:41,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:41,819 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:41,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:41,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1610628051, now seen corresponding path program 10 times [2022-02-10 02:51:41,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:41,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458818589] [2022-02-10 02:51:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:41,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:41,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:41,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458818589] [2022-02-10 02:51:41,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458818589] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:41,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275545056] [2022-02-10 02:51:41,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 02:51:41,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:41,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:41,903 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:41,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-10 02:51:41,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 02:51:41,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:51:41,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 02:51:41,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:42,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:42,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 129 [2022-02-10 02:51:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:42,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:42,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:42,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 39 treesize of output 202 [2022-02-10 02:51:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:43,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275545056] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:43,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:43,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-10 02:51:43,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021962245] [2022-02-10 02:51:43,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:43,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 02:51:43,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:43,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 02:51:43,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-10 02:51:43,526 INFO L87 Difference]: Start difference. First operand 49 states and 124 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:43,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:43,764 INFO L93 Difference]: Finished difference Result 78 states and 170 transitions. [2022-02-10 02:51:43,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 02:51:43,764 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-10 02:51:43,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:43,765 INFO L225 Difference]: With dead ends: 78 [2022-02-10 02:51:43,765 INFO L226 Difference]: Without dead ends: 70 [2022-02-10 02:51:43,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-02-10 02:51:43,766 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:43,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 33 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:51:43,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-10 02:51:43,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 49. [2022-02-10 02:51:43,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.5833333333333335) internal successors, (124), 48 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:43,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 124 transitions. [2022-02-10 02:51:43,775 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 124 transitions. Word has length 14 [2022-02-10 02:51:43,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:43,775 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 124 transitions. [2022-02-10 02:51:43,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:43,775 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 124 transitions. [2022-02-10 02:51:43,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 02:51:43,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:43,775 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:43,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-10 02:51:43,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:43,983 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:43,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:43,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1829032591, now seen corresponding path program 11 times [2022-02-10 02:51:43,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:43,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221577416] [2022-02-10 02:51:43,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:43,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:44,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:44,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221577416] [2022-02-10 02:51:44,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221577416] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:44,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925987767] [2022-02-10 02:51:44,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 02:51:44,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:44,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:44,108 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:44,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-10 02:51:44,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 02:51:44,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:51:44,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 02:51:44,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:44,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:44,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 114 [2022-02-10 02:51:44,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:44,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:45,014 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:45,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 39 treesize of output 202 [2022-02-10 02:51:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:46,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925987767] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:46,342 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:46,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-10 02:51:46,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733167971] [2022-02-10 02:51:46,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:46,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 02:51:46,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:46,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 02:51:46,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-02-10 02:51:46,343 INFO L87 Difference]: Start difference. First operand 49 states and 124 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:46,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:46,686 INFO L93 Difference]: Finished difference Result 110 states and 214 transitions. [2022-02-10 02:51:46,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-10 02:51:46,686 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) 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 14 [2022-02-10 02:51:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:46,687 INFO L225 Difference]: With dead ends: 110 [2022-02-10 02:51:46,687 INFO L226 Difference]: Without dead ends: 87 [2022-02-10 02:51:46,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2022-02-10 02:51:46,688 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 70 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:46,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 53 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 02:51:46,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-10 02:51:46,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 49. [2022-02-10 02:51:46,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 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) [2022-02-10 02:51:46,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 122 transitions. [2022-02-10 02:51:46,690 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 122 transitions. Word has length 14 [2022-02-10 02:51:46,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:46,690 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 122 transitions. [2022-02-10 02:51:46,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:46,690 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 122 transitions. [2022-02-10 02:51:46,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 02:51:46,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:46,690 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:46,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-10 02:51:46,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:46,896 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:46,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:46,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1084330093, now seen corresponding path program 12 times [2022-02-10 02:51:46,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:46,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682260300] [2022-02-10 02:51:46,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:46,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:46,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:46,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682260300] [2022-02-10 02:51:46,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682260300] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:46,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948059559] [2022-02-10 02:51:46,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 02:51:46,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:46,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:46,962 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:46,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-10 02:51:46,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 02:51:46,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:51:46,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 02:51:46,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:47,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:47,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 114 [2022-02-10 02:51:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:47,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:47,781 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:47,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 39 treesize of output 202 [2022-02-10 02:51:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:48,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948059559] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:48,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:48,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-10 02:51:48,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687868797] [2022-02-10 02:51:48,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:48,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 02:51:48,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:48,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 02:51:48,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-02-10 02:51:48,680 INFO L87 Difference]: Start difference. First operand 49 states and 122 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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) [2022-02-10 02:51:48,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:48,857 INFO L93 Difference]: Finished difference Result 67 states and 156 transitions. [2022-02-10 02:51:48,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 02:51:48,858 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 14 [2022-02-10 02:51:48,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:48,860 INFO L225 Difference]: With dead ends: 67 [2022-02-10 02:51:48,860 INFO L226 Difference]: Without dead ends: 63 [2022-02-10 02:51:48,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-02-10 02:51:48,863 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:48,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:51:48,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-10 02:51:48,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2022-02-10 02:51:48,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 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) [2022-02-10 02:51:48,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 122 transitions. [2022-02-10 02:51:48,868 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 122 transitions. Word has length 14 [2022-02-10 02:51:48,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:48,868 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 122 transitions. [2022-02-10 02:51:48,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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) [2022-02-10 02:51:48,869 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 122 transitions. [2022-02-10 02:51:48,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 02:51:48,869 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:48,869 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:48,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-10 02:51:49,077 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,SelfDestructingSolverStorable23 [2022-02-10 02:51:49,077 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:49,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:49,078 INFO L85 PathProgramCache]: Analyzing trace with hash 986970579, now seen corresponding path program 13 times [2022-02-10 02:51:49,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:49,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729287615] [2022-02-10 02:51:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:49,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:49,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:49,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729287615] [2022-02-10 02:51:49,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729287615] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:49,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802289257] [2022-02-10 02:51:49,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 02:51:49,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:49,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:49,142 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:49,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-10 02:51:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:49,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 02:51:49,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:49,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:49,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 129 [2022-02-10 02:51:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:49,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:49,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:49,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 39 treesize of output 202 [2022-02-10 02:51:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:50,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802289257] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:50,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:50,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-02-10 02:51:50,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901913550] [2022-02-10 02:51:50,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:50,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 02:51:50,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:50,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 02:51:50,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-10 02:51:50,210 INFO L87 Difference]: Start difference. First operand 49 states and 122 transitions. Second operand has 20 states, 20 states have (on average 1.6) 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) [2022-02-10 02:51:50,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:50,393 INFO L93 Difference]: Finished difference Result 70 states and 165 transitions. [2022-02-10 02:51:50,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 02:51:50,393 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) 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 14 [2022-02-10 02:51:50,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:50,394 INFO L225 Difference]: With dead ends: 70 [2022-02-10 02:51:50,394 INFO L226 Difference]: Without dead ends: 60 [2022-02-10 02:51:50,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-02-10 02:51:50,394 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 28 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:50,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 30 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:51:50,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-10 02:51:50,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2022-02-10 02:51:50,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.6545454545454548) internal successors, (146), 55 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) [2022-02-10 02:51:50,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 146 transitions. [2022-02-10 02:51:50,396 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 146 transitions. Word has length 14 [2022-02-10 02:51:50,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:50,396 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 146 transitions. [2022-02-10 02:51:50,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) 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) [2022-02-10 02:51:50,396 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 146 transitions. [2022-02-10 02:51:50,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 02:51:50,396 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:50,397 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:50,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-10 02:51:50,597 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,SelfDestructingSolverStorable24 [2022-02-10 02:51:50,597 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:50,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:50,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1590247657, now seen corresponding path program 14 times [2022-02-10 02:51:50,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:50,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206293326] [2022-02-10 02:51:50,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:50,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:50,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:50,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:50,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206293326] [2022-02-10 02:51:50,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206293326] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:50,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733996792] [2022-02-10 02:51:50,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 02:51:50,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:50,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:50,664 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:50,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-10 02:51:50,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 02:51:50,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:51:50,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 02:51:50,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:50,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:50,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 129 [2022-02-10 02:51:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:51,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:51,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:51,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 39 treesize of output 202 [2022-02-10 02:51:51,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:51,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733996792] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:51,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:51,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-10 02:51:51,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121099730] [2022-02-10 02:51:51,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:51,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 02:51:51,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:51,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 02:51:51,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-10 02:51:51,846 INFO L87 Difference]: Start difference. First operand 56 states and 146 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:52,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:52,080 INFO L93 Difference]: Finished difference Result 87 states and 200 transitions. [2022-02-10 02:51:52,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 02:51:52,080 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-10 02:51:52,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:52,081 INFO L225 Difference]: With dead ends: 87 [2022-02-10 02:51:52,081 INFO L226 Difference]: Without dead ends: 79 [2022-02-10 02:51:52,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-02-10 02:51:52,081 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:52,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:51:52,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-10 02:51:52,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 56. [2022-02-10 02:51:52,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.6545454545454548) internal successors, (146), 55 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) [2022-02-10 02:51:52,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 146 transitions. [2022-02-10 02:51:52,083 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 146 transitions. Word has length 14 [2022-02-10 02:51:52,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:52,083 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 146 transitions. [2022-02-10 02:51:52,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:52,083 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 146 transitions. [2022-02-10 02:51:52,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 02:51:52,085 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:52,085 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:52,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-10 02:51:52,295 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,SelfDestructingSolverStorable25 [2022-02-10 02:51:52,296 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:52,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:52,296 INFO L85 PathProgramCache]: Analyzing trace with hash -734941003, now seen corresponding path program 15 times [2022-02-10 02:51:52,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:52,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418351504] [2022-02-10 02:51:52,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:52,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:52,387 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:52,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418351504] [2022-02-10 02:51:52,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418351504] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:52,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378221936] [2022-02-10 02:51:52,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 02:51:52,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:52,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:52,389 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:52,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-10 02:51:52,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 02:51:52,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:51:52,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 02:51:52,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:52,604 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:52,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 114 [2022-02-10 02:51:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:52,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:53,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:53,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 39 treesize of output 202 [2022-02-10 02:51:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:53,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378221936] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:53,998 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:53,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-10 02:51:53,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126799315] [2022-02-10 02:51:53,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:53,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 02:51:53,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:53,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 02:51:53,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-02-10 02:51:53,999 INFO L87 Difference]: Start difference. First operand 56 states and 146 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:54,383 INFO L93 Difference]: Finished difference Result 120 states and 240 transitions. [2022-02-10 02:51:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 02:51:54,383 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) 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 14 [2022-02-10 02:51:54,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:54,384 INFO L225 Difference]: With dead ends: 120 [2022-02-10 02:51:54,384 INFO L226 Difference]: Without dead ends: 102 [2022-02-10 02:51:54,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 02:51:54,385 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 67 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:54,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 58 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 02:51:54,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-02-10 02:51:54,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 57. [2022-02-10 02:51:54,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.625) internal successors, (147), 56 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:54,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 147 transitions. [2022-02-10 02:51:54,387 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 147 transitions. Word has length 14 [2022-02-10 02:51:54,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:54,388 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 147 transitions. [2022-02-10 02:51:54,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:54,389 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 147 transitions. [2022-02-10 02:51:54,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 02:51:54,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:54,389 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:54,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-10 02:51:54,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:54,595 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:54,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:54,596 INFO L85 PathProgramCache]: Analyzing trace with hash 9761495, now seen corresponding path program 16 times [2022-02-10 02:51:54,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:54,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188825000] [2022-02-10 02:51:54,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:54,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:54,648 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:54,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188825000] [2022-02-10 02:51:54,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188825000] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:54,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812232982] [2022-02-10 02:51:54,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 02:51:54,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:54,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:54,649 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:54,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-10 02:51:54,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 02:51:54,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:51:54,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 02:51:54,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:54,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:54,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 114 [2022-02-10 02:51:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:55,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:55,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:55,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 39 treesize of output 202 [2022-02-10 02:51:55,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:55,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812232982] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:55,915 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:55,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-02-10 02:51:55,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995797948] [2022-02-10 02:51:55,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:55,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 02:51:55,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:55,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 02:51:55,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-02-10 02:51:55,916 INFO L87 Difference]: Start difference. First operand 57 states and 147 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) 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) [2022-02-10 02:51:56,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:56,176 INFO L93 Difference]: Finished difference Result 83 states and 198 transitions. [2022-02-10 02:51:56,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 02:51:56,177 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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 14 [2022-02-10 02:51:56,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:56,177 INFO L225 Difference]: With dead ends: 83 [2022-02-10 02:51:56,177 INFO L226 Difference]: Without dead ends: 79 [2022-02-10 02:51:56,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-02-10 02:51:56,178 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:56,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 27 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:51:56,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-10 02:51:56,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2022-02-10 02:51:56,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.625) internal successors, (147), 56 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:56,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 147 transitions. [2022-02-10 02:51:56,180 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 147 transitions. Word has length 14 [2022-02-10 02:51:56,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:56,180 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 147 transitions. [2022-02-10 02:51:56,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) 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) [2022-02-10 02:51:56,180 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 147 transitions. [2022-02-10 02:51:56,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 02:51:56,181 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:56,181 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:56,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-10 02:51:56,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-10 02:51:56,391 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:56,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:56,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1620702453, now seen corresponding path program 17 times [2022-02-10 02:51:56,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:56,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374371470] [2022-02-10 02:51:56,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:56,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:56,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:56,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374371470] [2022-02-10 02:51:56,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374371470] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:56,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773232730] [2022-02-10 02:51:56,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 02:51:56,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:56,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:56,486 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:56,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-10 02:51:56,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 02:51:56,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:51:56,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 02:51:56,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:51:56,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:56,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 114 [2022-02-10 02:51:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:57,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:51:57,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:51:57,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 39 treesize of output 202 [2022-02-10 02:51:59,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:59,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773232730] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:51:59,357 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:51:59,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-10 02:51:59,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079503720] [2022-02-10 02:51:59,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:51:59,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-10 02:51:59,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:51:59,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-10 02:51:59,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-02-10 02:51:59,359 INFO L87 Difference]: Start difference. First operand 57 states and 147 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) 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) [2022-02-10 02:51:59,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:51:59,587 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2022-02-10 02:51:59,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 02:51:59,588 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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 14 [2022-02-10 02:51:59,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:51:59,588 INFO L225 Difference]: With dead ends: 88 [2022-02-10 02:51:59,588 INFO L226 Difference]: Without dead ends: 84 [2022-02-10 02:51:59,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-02-10 02:51:59,589 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:51:59,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:51:59,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-10 02:51:59,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 58. [2022-02-10 02:51:59,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.5964912280701755) internal successors, (148), 57 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:51:59,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 148 transitions. [2022-02-10 02:51:59,591 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 148 transitions. Word has length 14 [2022-02-10 02:51:59,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:51:59,591 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 148 transitions. [2022-02-10 02:51:59,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) 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) [2022-02-10 02:51:59,591 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 148 transitions. [2022-02-10 02:51:59,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 02:51:59,591 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:51:59,591 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:51:59,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-10 02:51:59,799 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,SelfDestructingSolverStorable28 [2022-02-10 02:51:59,799 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:51:59,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:51:59,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1098771542, now seen corresponding path program 18 times [2022-02-10 02:51:59,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:51:59,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322798989] [2022-02-10 02:51:59,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:51:59,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:51:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:51:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:51:59,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:51:59,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322798989] [2022-02-10 02:51:59,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322798989] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:51:59,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80766840] [2022-02-10 02:51:59,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 02:51:59,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:51:59,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:51:59,900 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:51:59,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-10 02:51:59,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 02:51:59,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:51:59,926 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 02:51:59,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:52:00,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:52:00,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-02-10 02:52:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:52:00,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:52:00,632 INFO L353 Elim1Store]: treesize reduction 20, result has 93.1 percent of original size [2022-02-10 02:52:00,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 21 treesize of output 300 [2022-02-10 02:52:06,795 INFO L353 Elim1Store]: treesize reduction 15, result has 91.1 percent of original size [2022-02-10 02:52:06,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 17 treesize of output 177 [2022-02-10 02:52:09,600 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-10 02:52:09,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-10 02:52:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:52:13,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80766840] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:52:13,200 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:52:13,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-10 02:52:13,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920385323] [2022-02-10 02:52:13,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:52:13,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 02:52:13,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:52:13,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 02:52:13,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-02-10 02:52:13,201 INFO L87 Difference]: Start difference. First operand 58 states and 148 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:52:13,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:52:13,792 INFO L93 Difference]: Finished difference Result 107 states and 218 transitions. [2022-02-10 02:52:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-10 02:52:13,793 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 15 [2022-02-10 02:52:13,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:52:13,793 INFO L225 Difference]: With dead ends: 107 [2022-02-10 02:52:13,793 INFO L226 Difference]: Without dead ends: 95 [2022-02-10 02:52:13,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 02:52:13,794 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 02:52:13,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 84 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 02:52:13,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-02-10 02:52:13,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 66. [2022-02-10 02:52:13,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.6153846153846154) internal successors, (170), 65 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:52:13,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 170 transitions. [2022-02-10 02:52:13,796 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 170 transitions. Word has length 15 [2022-02-10 02:52:13,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:52:13,796 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 170 transitions. [2022-02-10 02:52:13,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:52:13,797 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 170 transitions. [2022-02-10 02:52:13,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 02:52:13,797 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:52:13,797 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:52:13,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-10 02:52:14,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:52:14,007 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:52:14,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:52:14,008 INFO L85 PathProgramCache]: Analyzing trace with hash -630275792, now seen corresponding path program 19 times [2022-02-10 02:52:14,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:52:14,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097727159] [2022-02-10 02:52:14,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:52:14,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:52:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:52:14,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:52:14,131 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:52:14,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097727159] [2022-02-10 02:52:14,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097727159] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:52:14,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505721154] [2022-02-10 02:52:14,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 02:52:14,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:52:14,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:52:14,147 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:52:14,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-10 02:52:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:52:14,186 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 02:52:14,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:52:14,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:52:14,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-02-10 02:52:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:52:14,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:52:14,834 INFO L353 Elim1Store]: treesize reduction 20, result has 93.1 percent of original size [2022-02-10 02:52:14,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 21 treesize of output 300 [2022-02-10 02:52:22,848 INFO L353 Elim1Store]: treesize reduction 15, result has 91.1 percent of original size [2022-02-10 02:52:22,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 17 treesize of output 177 [2022-02-10 02:52:24,878 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-10 02:52:24,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-10 02:52:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:52:29,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505721154] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:52:29,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:52:29,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-10 02:52:29,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303506117] [2022-02-10 02:52:29,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:52:29,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 02:52:29,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:52:29,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 02:52:29,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-02-10 02:52:29,207 INFO L87 Difference]: Start difference. First operand 66 states and 170 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:52:29,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:52:29,825 INFO L93 Difference]: Finished difference Result 129 states and 252 transitions. [2022-02-10 02:52:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 02:52:29,825 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 15 [2022-02-10 02:52:29,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:52:29,826 INFO L225 Difference]: With dead ends: 129 [2022-02-10 02:52:29,826 INFO L226 Difference]: Without dead ends: 119 [2022-02-10 02:52:29,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 02:52:29,827 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 02:52:29,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 100 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 02:52:29,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-10 02:52:29,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 69. [2022-02-10 02:52:29,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.6470588235294117) internal successors, (180), 68 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:52:29,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 180 transitions. [2022-02-10 02:52:29,830 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 180 transitions. Word has length 15 [2022-02-10 02:52:29,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:52:29,830 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 180 transitions. [2022-02-10 02:52:29,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:52:29,831 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 180 transitions. [2022-02-10 02:52:29,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 02:52:29,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:52:29,831 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:52:29,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-10 02:52:30,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:52:30,033 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:52:30,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:52:30,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1087473268, now seen corresponding path program 20 times [2022-02-10 02:52:30,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:52:30,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127016314] [2022-02-10 02:52:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:52:30,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:52:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:52:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:52:30,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:52:30,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127016314] [2022-02-10 02:52:30,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127016314] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:52:30,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189836039] [2022-02-10 02:52:30,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 02:52:30,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:52:30,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:52:30,135 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:52:30,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-10 02:52:30,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 02:52:30,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:52:30,159 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 02:52:30,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:52:30,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:52:30,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-10 02:52:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:52:30,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:52:31,270 INFO L353 Elim1Store]: treesize reduction 20, result has 93.1 percent of original size [2022-02-10 02:52:31,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 21 treesize of output 300 [2022-02-10 02:52:37,195 INFO L353 Elim1Store]: treesize reduction 15, result has 91.1 percent of original size [2022-02-10 02:52:37,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 17 treesize of output 177 [2022-02-10 02:52:38,359 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-10 02:52:38,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-10 02:52:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:52:41,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189836039] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:52:41,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:52:41,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-10 02:52:41,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207287451] [2022-02-10 02:52:41,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:52:41,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 02:52:41,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:52:41,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 02:52:41,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-02-10 02:52:41,191 INFO L87 Difference]: Start difference. First operand 69 states and 180 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:52:42,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:52:42,139 INFO L93 Difference]: Finished difference Result 139 states and 272 transitions. [2022-02-10 02:52:42,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 02:52:42,139 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 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 15 [2022-02-10 02:52:42,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:52:42,140 INFO L225 Difference]: With dead ends: 139 [2022-02-10 02:52:42,140 INFO L226 Difference]: Without dead ends: 127 [2022-02-10 02:52:42,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 02:52:42,141 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 65 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 02:52:42,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 103 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 02:52:42,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-02-10 02:52:42,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 71. [2022-02-10 02:52:42,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.6857142857142855) internal successors, (188), 70 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:52:42,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 188 transitions. [2022-02-10 02:52:42,143 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 188 transitions. Word has length 15 [2022-02-10 02:52:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:52:42,143 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 188 transitions. [2022-02-10 02:52:42,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:52:42,143 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 188 transitions. [2022-02-10 02:52:42,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 02:52:42,143 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:52:42,143 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:52:42,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-02-10 02:52:42,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:52:42,344 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:52:42,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:52:42,344 INFO L85 PathProgramCache]: Analyzing trace with hash -862782378, now seen corresponding path program 21 times [2022-02-10 02:52:42,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:52:42,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186144137] [2022-02-10 02:52:42,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:52:42,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:52:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:52:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:52:42,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:52:42,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186144137] [2022-02-10 02:52:42,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186144137] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:52:42,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959902794] [2022-02-10 02:52:42,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 02:52:42,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:52:42,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:52:42,450 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:52:42,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-10 02:52:42,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 02:52:42,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:52:42,489 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 02:52:42,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:52:42,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:52:42,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-10 02:52:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:52:43,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:52:43,589 INFO L353 Elim1Store]: treesize reduction 20, result has 93.1 percent of original size [2022-02-10 02:52:43,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 21 treesize of output 300 [2022-02-10 02:52:50,547 INFO L353 Elim1Store]: treesize reduction 15, result has 91.1 percent of original size [2022-02-10 02:52:50,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 17 treesize of output 177 [2022-02-10 02:52:51,959 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-10 02:52:51,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-10 02:52:53,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:52:53,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959902794] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:52:53,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:52:53,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-02-10 02:52:53,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846475243] [2022-02-10 02:52:53,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:52:53,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 02:52:53,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:52:53,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 02:52:53,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-02-10 02:52:53,846 INFO L87 Difference]: Start difference. First operand 71 states and 188 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:52:54,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:52:54,444 INFO L93 Difference]: Finished difference Result 152 states and 309 transitions. [2022-02-10 02:52:54,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-10 02:52:54,444 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) 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 15 [2022-02-10 02:52:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:52:54,446 INFO L225 Difference]: With dead ends: 152 [2022-02-10 02:52:54,446 INFO L226 Difference]: Without dead ends: 132 [2022-02-10 02:52:54,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=1206, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 02:52:54,446 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 02:52:54,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 92 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 02:52:54,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-10 02:52:54,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 78. [2022-02-10 02:52:54,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.792207792207792) internal successors, (215), 77 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:52:54,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 215 transitions. [2022-02-10 02:52:54,450 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 215 transitions. Word has length 15 [2022-02-10 02:52:54,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:52:54,450 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 215 transitions. [2022-02-10 02:52:54,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:52:54,450 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 215 transitions. [2022-02-10 02:52:54,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 02:52:54,450 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:52:54,450 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:52:54,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-10 02:52:54,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:52:54,651 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:52:54,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:52:54,651 INFO L85 PathProgramCache]: Analyzing trace with hash -213956176, now seen corresponding path program 22 times [2022-02-10 02:52:54,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:52:54,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496772514] [2022-02-10 02:52:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:52:54,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:52:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:52:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:52:54,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:52:54,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496772514] [2022-02-10 02:52:54,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496772514] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:52:54,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967450901] [2022-02-10 02:52:54,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 02:52:54,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:52:54,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:52:54,786 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:52:54,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-10 02:52:54,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 02:52:54,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:52:54,811 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 02:52:54,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:52:55,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:52:55,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-02-10 02:52:55,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:52:55,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:52:55,525 INFO L353 Elim1Store]: treesize reduction 20, result has 93.1 percent of original size [2022-02-10 02:52:55,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 21 treesize of output 300 [2022-02-10 02:53:05,214 INFO L353 Elim1Store]: treesize reduction 15, result has 91.1 percent of original size [2022-02-10 02:53:05,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 17 treesize of output 177 [2022-02-10 02:53:07,418 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-10 02:53:07,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-10 02:53:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:53:11,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967450901] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:53:11,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:53:11,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-10 02:53:11,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045352614] [2022-02-10 02:53:11,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:53:11,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 02:53:11,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:53:11,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 02:53:11,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-02-10 02:53:11,844 INFO L87 Difference]: Start difference. First operand 78 states and 215 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:53:12,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:53:12,969 INFO L93 Difference]: Finished difference Result 180 states and 347 transitions. [2022-02-10 02:53:12,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-10 02:53:12,969 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 15 [2022-02-10 02:53:12,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:53:12,970 INFO L225 Difference]: With dead ends: 180 [2022-02-10 02:53:12,970 INFO L226 Difference]: Without dead ends: 165 [2022-02-10 02:53:12,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=329, Invalid=1651, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 02:53:12,971 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 139 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 02:53:12,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 83 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 02:53:12,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-02-10 02:53:12,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 86. [2022-02-10 02:53:12,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.847058823529412) internal successors, (242), 85 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:53:12,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 242 transitions. [2022-02-10 02:53:12,973 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 242 transitions. Word has length 15 [2022-02-10 02:53:12,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:53:12,974 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 242 transitions. [2022-02-10 02:53:12,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:53:12,974 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 242 transitions. [2022-02-10 02:53:12,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 02:53:12,974 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:53:12,974 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:53:12,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-10 02:53:13,184 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,SelfDestructingSolverStorable33 [2022-02-10 02:53:13,184 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:53:13,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:53:13,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1503792884, now seen corresponding path program 23 times [2022-02-10 02:53:13,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:53:13,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199782316] [2022-02-10 02:53:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:53:13,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:53:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:53:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:53:13,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:53:13,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199782316] [2022-02-10 02:53:13,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199782316] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:53:13,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163673405] [2022-02-10 02:53:13,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 02:53:13,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:53:13,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:53:13,288 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:53:13,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-10 02:53:13,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 02:53:13,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:53:13,311 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 02:53:13,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:53:13,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:53:13,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-10 02:53:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:53:13,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:53:14,160 INFO L353 Elim1Store]: treesize reduction 20, result has 93.1 percent of original size [2022-02-10 02:53:14,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 21 treesize of output 300 [2022-02-10 02:53:25,209 INFO L353 Elim1Store]: treesize reduction 15, result has 91.1 percent of original size [2022-02-10 02:53:25,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 17 treesize of output 177 [2022-02-10 02:53:26,874 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-10 02:53:26,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-10 02:53:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:53:31,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163673405] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:53:31,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:53:31,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-10 02:53:31,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203722105] [2022-02-10 02:53:31,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:53:31,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 02:53:31,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:53:31,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 02:53:31,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-02-10 02:53:31,158 INFO L87 Difference]: Start difference. First operand 86 states and 242 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:53:32,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:53:32,488 INFO L93 Difference]: Finished difference Result 165 states and 329 transitions. [2022-02-10 02:53:32,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-10 02:53:32,490 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 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 15 [2022-02-10 02:53:32,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:53:32,491 INFO L225 Difference]: With dead ends: 165 [2022-02-10 02:53:32,491 INFO L226 Difference]: Without dead ends: 153 [2022-02-10 02:53:32,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=313, Invalid=1493, Unknown=0, NotChecked=0, Total=1806 [2022-02-10 02:53:32,492 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 92 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 02:53:32,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 134 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 02:53:32,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-02-10 02:53:32,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 86. [2022-02-10 02:53:32,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.847058823529412) internal successors, (242), 85 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:53:32,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 242 transitions. [2022-02-10 02:53:32,495 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 242 transitions. Word has length 15 [2022-02-10 02:53:32,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:53:32,495 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 242 transitions. [2022-02-10 02:53:32,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:53:32,495 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 242 transitions. [2022-02-10 02:53:32,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 02:53:32,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:53:32,496 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:53:32,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-10 02:53:32,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:53:32,703 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:53:32,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:53:32,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1935867758, now seen corresponding path program 24 times [2022-02-10 02:53:32,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:53:32,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301718267] [2022-02-10 02:53:32,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:53:32,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:53:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:53:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:53:32,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:53:32,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301718267] [2022-02-10 02:53:32,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301718267] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:53:32,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441674716] [2022-02-10 02:53:32,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 02:53:32,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:53:32,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:53:32,781 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:53:32,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-10 02:53:32,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 02:53:32,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:53:32,806 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 02:53:32,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:53:32,983 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:53:32,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-10 02:53:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:53:33,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:53:33,541 INFO L353 Elim1Store]: treesize reduction 20, result has 93.1 percent of original size [2022-02-10 02:53:33,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 21 treesize of output 300 [2022-02-10 02:53:52,675 INFO L353 Elim1Store]: treesize reduction 15, result has 91.1 percent of original size [2022-02-10 02:53:52,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 17 treesize of output 177 [2022-02-10 02:53:54,708 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-10 02:53:54,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-10 02:53:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:53:57,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441674716] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:53:57,334 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:53:57,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-10 02:53:57,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189681245] [2022-02-10 02:53:57,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:53:57,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 02:53:57,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:53:57,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 02:53:57,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-02-10 02:53:57,335 INFO L87 Difference]: Start difference. First operand 86 states and 242 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:53:57,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:53:57,917 INFO L93 Difference]: Finished difference Result 171 states and 347 transitions. [2022-02-10 02:53:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-10 02:53:57,917 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) 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 15 [2022-02-10 02:53:57,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:53:57,918 INFO L225 Difference]: With dead ends: 171 [2022-02-10 02:53:57,918 INFO L226 Difference]: Without dead ends: 151 [2022-02-10 02:53:57,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=256, Invalid=1384, Unknown=0, NotChecked=0, Total=1640 [2022-02-10 02:53:57,918 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 74 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 02:53:57,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 99 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 02:53:57,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-02-10 02:53:57,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 86. [2022-02-10 02:53:57,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.847058823529412) internal successors, (242), 85 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:53:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 242 transitions. [2022-02-10 02:53:57,935 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 242 transitions. Word has length 15 [2022-02-10 02:53:57,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:53:57,935 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 242 transitions. [2022-02-10 02:53:57,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:53:57,935 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 242 transitions. [2022-02-10 02:53:57,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 02:53:57,935 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:53:57,936 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:53:57,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-10 02:53:58,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:53:58,136 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:53:58,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:53:58,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1191165260, now seen corresponding path program 25 times [2022-02-10 02:53:58,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:53:58,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966617536] [2022-02-10 02:53:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:53:58,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:53:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:53:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:53:58,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:53:58,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966617536] [2022-02-10 02:53:58,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966617536] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:53:58,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272780757] [2022-02-10 02:53:58,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 02:53:58,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:53:58,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:53:58,238 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:53:58,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-10 02:53:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:53:58,266 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 02:53:58,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:53:58,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:53:58,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-10 02:53:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:53:58,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:53:59,356 INFO L353 Elim1Store]: treesize reduction 20, result has 93.1 percent of original size [2022-02-10 02:53:59,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 21 treesize of output 300 [2022-02-10 02:54:03,443 INFO L353 Elim1Store]: treesize reduction 15, result has 91.1 percent of original size [2022-02-10 02:54:03,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 17 treesize of output 177 [2022-02-10 02:54:05,221 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-10 02:54:05,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-10 02:54:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:54:11,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272780757] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:54:11,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:54:11,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-10 02:54:11,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832567385] [2022-02-10 02:54:11,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:54:11,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 02:54:11,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:54:11,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 02:54:11,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-02-10 02:54:11,211 INFO L87 Difference]: Start difference. First operand 86 states and 242 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:54:11,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:54:11,721 INFO L93 Difference]: Finished difference Result 159 states and 351 transitions. [2022-02-10 02:54:11,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-10 02:54:11,721 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) 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 15 [2022-02-10 02:54:11,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:54:11,722 INFO L225 Difference]: With dead ends: 159 [2022-02-10 02:54:11,722 INFO L226 Difference]: Without dead ends: 151 [2022-02-10 02:54:11,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 02:54:11,722 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 48 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 02:54:11,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 50 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 02:54:11,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-02-10 02:54:11,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 90. [2022-02-10 02:54:11,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.842696629213483) internal successors, (253), 89 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:54:11,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 253 transitions. [2022-02-10 02:54:11,725 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 253 transitions. Word has length 15 [2022-02-10 02:54:11,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:54:11,725 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 253 transitions. [2022-02-10 02:54:11,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:54:11,725 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 253 transitions. [2022-02-10 02:54:11,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 02:54:11,726 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:54:11,726 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:54:11,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-10 02:54:11,926 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,SelfDestructingSolverStorable36 [2022-02-10 02:54:11,927 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:54:11,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:54:11,927 INFO L85 PathProgramCache]: Analyzing trace with hash 466102194, now seen corresponding path program 26 times [2022-02-10 02:54:11,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:54:11,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042072627] [2022-02-10 02:54:11,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:54:11,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:54:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:54:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:54:11,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:54:11,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042072627] [2022-02-10 02:54:11,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042072627] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:54:11,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803461547] [2022-02-10 02:54:11,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 02:54:11,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:54:11,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:54:11,973 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:54:11,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-10 02:54:11,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 02:54:11,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:54:11,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-10 02:54:11,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:54:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:54:12,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:54:12,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:54:12,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803461547] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:54:12,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:54:12,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-02-10 02:54:12,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039015389] [2022-02-10 02:54:12,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:54:12,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 02:54:12,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:54:12,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 02:54:12,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-02-10 02:54:12,060 INFO L87 Difference]: Start difference. First operand 90 states and 253 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:54:12,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:54:12,226 INFO L93 Difference]: Finished difference Result 236 states and 480 transitions. [2022-02-10 02:54:12,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 02:54:12,227 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 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 15 [2022-02-10 02:54:12,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:54:12,227 INFO L225 Difference]: With dead ends: 236 [2022-02-10 02:54:12,227 INFO L226 Difference]: Without dead ends: 236 [2022-02-10 02:54:12,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2022-02-10 02:54:12,228 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:54:12,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 64 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:54:12,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-10 02:54:12,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 109. [2022-02-10 02:54:12,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.935185185185185) internal successors, (317), 108 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:54:12,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 317 transitions. [2022-02-10 02:54:12,231 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 317 transitions. Word has length 15 [2022-02-10 02:54:12,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:54:12,231 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 317 transitions. [2022-02-10 02:54:12,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:54:12,231 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 317 transitions. [2022-02-10 02:54:12,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 02:54:12,232 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:54:12,232 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:54:12,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-10 02:54:12,432 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,SelfDestructingSolverStorable37 [2022-02-10 02:54:12,432 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:54:12,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:54:12,433 INFO L85 PathProgramCache]: Analyzing trace with hash 880135412, now seen corresponding path program 27 times [2022-02-10 02:54:12,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:54:12,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514618130] [2022-02-10 02:54:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:54:12,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:54:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:54:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:54:12,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:54:12,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514618130] [2022-02-10 02:54:12,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514618130] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:54:12,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475244312] [2022-02-10 02:54:12,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 02:54:12,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:54:12,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:54:12,561 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:54:12,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-10 02:54:12,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 02:54:12,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:54:12,589 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 02:54:12,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:54:12,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:54:12,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-02-10 02:54:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:54:12,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:54:13,296 INFO L353 Elim1Store]: treesize reduction 20, result has 93.1 percent of original size [2022-02-10 02:54:13,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 21 treesize of output 300 [2022-02-10 02:54:26,291 INFO L353 Elim1Store]: treesize reduction 15, result has 91.1 percent of original size [2022-02-10 02:54:26,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 17 treesize of output 177 [2022-02-10 02:54:27,401 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-10 02:54:27,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-10 02:54:30,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:54:30,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475244312] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:54:30,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:54:30,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-10 02:54:30,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318192689] [2022-02-10 02:54:30,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:54:30,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 02:54:30,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:54:30,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 02:54:30,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-02-10 02:54:30,558 INFO L87 Difference]: Start difference. First operand 109 states and 317 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:54:31,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:54:31,476 INFO L93 Difference]: Finished difference Result 187 states and 446 transitions. [2022-02-10 02:54:31,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-10 02:54:31,476 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 15 [2022-02-10 02:54:31,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:54:31,477 INFO L225 Difference]: With dead ends: 187 [2022-02-10 02:54:31,477 INFO L226 Difference]: Without dead ends: 177 [2022-02-10 02:54:31,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=1302, Unknown=0, NotChecked=0, Total=1560 [2022-02-10 02:54:31,478 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 112 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 02:54:31,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 40 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 02:54:31,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-10 02:54:31,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 123. [2022-02-10 02:54:31,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 3.0081967213114753) internal successors, (367), 122 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:54:31,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 367 transitions. [2022-02-10 02:54:31,482 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 367 transitions. Word has length 15 [2022-02-10 02:54:31,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:54:31,482 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 367 transitions. [2022-02-10 02:54:31,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:54:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 367 transitions. [2022-02-10 02:54:31,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 02:54:31,483 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:54:31,483 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:54:31,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-10 02:54:31,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-10 02:54:31,684 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:54:31,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:54:31,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1697082824, now seen corresponding path program 28 times [2022-02-10 02:54:31,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:54:31,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852166617] [2022-02-10 02:54:31,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:54:31,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:54:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:54:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:54:31,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:54:31,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852166617] [2022-02-10 02:54:31,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852166617] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:54:31,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004364924] [2022-02-10 02:54:31,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 02:54:31,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:54:31,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:54:31,926 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:54:31,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-10 02:54:31,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 02:54:31,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:54:31,967 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 02:54:31,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:54:32,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:54:32,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-10 02:54:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:54:32,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:54:32,915 INFO L353 Elim1Store]: treesize reduction 20, result has 93.1 percent of original size [2022-02-10 02:54:32,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 21 treesize of output 300 [2022-02-10 02:54:45,456 INFO L353 Elim1Store]: treesize reduction 15, result has 91.1 percent of original size [2022-02-10 02:54:45,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 17 treesize of output 177 [2022-02-10 02:54:47,532 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-10 02:54:47,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-10 02:54:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:54:50,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004364924] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:54:50,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:54:50,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-10 02:54:50,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539816492] [2022-02-10 02:54:50,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:54:50,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 02:54:50,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:54:50,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 02:54:50,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-02-10 02:54:50,038 INFO L87 Difference]: Start difference. First operand 123 states and 367 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:54:50,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:54:50,986 INFO L93 Difference]: Finished difference Result 178 states and 439 transitions. [2022-02-10 02:54:50,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 02:54:50,987 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 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 15 [2022-02-10 02:54:50,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:54:50,988 INFO L225 Difference]: With dead ends: 178 [2022-02-10 02:54:50,988 INFO L226 Difference]: Without dead ends: 166 [2022-02-10 02:54:50,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=275, Invalid=1285, Unknown=0, NotChecked=0, Total=1560 [2022-02-10 02:54:50,988 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 74 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 02:54:50,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 45 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 02:54:50,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-02-10 02:54:50,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 122. [2022-02-10 02:54:50,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 3.0) internal successors, (363), 121 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:54:50,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 363 transitions. [2022-02-10 02:54:50,992 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 363 transitions. Word has length 15 [2022-02-10 02:54:50,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:54:50,992 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 363 transitions. [2022-02-10 02:54:50,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:54:50,992 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 363 transitions. [2022-02-10 02:54:50,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 02:54:50,993 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:54:50,993 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:54:51,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-10 02:54:51,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-10 02:54:51,210 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:54:51,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:54:51,210 INFO L85 PathProgramCache]: Analyzing trace with hash -841776170, now seen corresponding path program 29 times [2022-02-10 02:54:51,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:54:51,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246977914] [2022-02-10 02:54:51,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:54:51,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:54:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:54:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:54:51,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:54:51,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246977914] [2022-02-10 02:54:51,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246977914] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:54:51,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582173787] [2022-02-10 02:54:51,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 02:54:51,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:54:51,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:54:51,277 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:54:51,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-10 02:54:51,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 02:54:51,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:54:51,302 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 02:54:51,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:54:51,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:54:51,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-10 02:54:51,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:54:51,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:54:52,086 INFO L353 Elim1Store]: treesize reduction 20, result has 93.1 percent of original size [2022-02-10 02:54:52,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 21 treesize of output 300 [2022-02-10 02:54:58,101 INFO L353 Elim1Store]: treesize reduction 15, result has 91.1 percent of original size [2022-02-10 02:54:58,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 17 treesize of output 177 [2022-02-10 02:55:00,751 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-10 02:55:00,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-10 02:55:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:55:02,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582173787] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:55:02,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:55:02,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-10 02:55:02,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860051349] [2022-02-10 02:55:02,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:55:02,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 02:55:02,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:55:02,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 02:55:02,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-02-10 02:55:02,436 INFO L87 Difference]: Start difference. First operand 122 states and 363 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:55:03,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:55:03,168 INFO L93 Difference]: Finished difference Result 191 states and 454 transitions. [2022-02-10 02:55:03,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-10 02:55:03,168 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) 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 15 [2022-02-10 02:55:03,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:55:03,169 INFO L225 Difference]: With dead ends: 191 [2022-02-10 02:55:03,169 INFO L226 Difference]: Without dead ends: 175 [2022-02-10 02:55:03,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=1506, Unknown=0, NotChecked=0, Total=1806 [2022-02-10 02:55:03,170 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 69 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 02:55:03,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 43 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 02:55:03,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-02-10 02:55:03,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 122. [2022-02-10 02:55:03,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 3.0) internal successors, (363), 121 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:55:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 363 transitions. [2022-02-10 02:55:03,173 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 363 transitions. Word has length 15 [2022-02-10 02:55:03,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:55:03,173 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 363 transitions. [2022-02-10 02:55:03,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:55:03,173 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 363 transitions. [2022-02-10 02:55:03,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 02:55:03,173 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:55:03,173 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:55:03,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-10 02:55:03,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:55:03,374 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:55:03,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:55:03,374 INFO L85 PathProgramCache]: Analyzing trace with hash -97073672, now seen corresponding path program 30 times [2022-02-10 02:55:03,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:55:03,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21452113] [2022-02-10 02:55:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:55:03,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:55:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:55:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:55:03,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:55:03,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21452113] [2022-02-10 02:55:03,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21452113] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:55:03,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102017699] [2022-02-10 02:55:03,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 02:55:03,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:55:03,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:55:03,501 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:55:03,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-10 02:55:03,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 02:55:03,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:55:03,524 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 02:55:03,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:55:03,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:55:03,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-10 02:55:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:55:03,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:55:04,211 INFO L353 Elim1Store]: treesize reduction 20, result has 93.1 percent of original size [2022-02-10 02:55:04,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 21 treesize of output 300 [2022-02-10 02:55:21,580 INFO L353 Elim1Store]: treesize reduction 15, result has 91.1 percent of original size [2022-02-10 02:55:21,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 17 treesize of output 177 [2022-02-10 02:55:24,062 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-10 02:55:24,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-10 02:55:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:55:24,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102017699] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:55:24,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:55:24,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-10 02:55:24,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623716153] [2022-02-10 02:55:24,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:55:24,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 02:55:24,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:55:24,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 02:55:24,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-10 02:55:24,934 INFO L87 Difference]: Start difference. First operand 122 states and 363 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:55:25,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:55:25,563 INFO L93 Difference]: Finished difference Result 192 states and 474 transitions. [2022-02-10 02:55:25,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-10 02:55:25,563 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) 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 15 [2022-02-10 02:55:25,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:55:25,564 INFO L225 Difference]: With dead ends: 192 [2022-02-10 02:55:25,564 INFO L226 Difference]: Without dead ends: 184 [2022-02-10 02:55:25,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2022-02-10 02:55:25,565 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 43 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 02:55:25,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 31 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 02:55:25,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-10 02:55:25,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 126. [2022-02-10 02:55:25,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.008) internal successors, (376), 125 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:55:25,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 376 transitions. [2022-02-10 02:55:25,567 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 376 transitions. Word has length 15 [2022-02-10 02:55:25,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:55:25,568 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 376 transitions. [2022-02-10 02:55:25,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:55:25,568 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 376 transitions. [2022-02-10 02:55:25,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 02:55:25,568 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:55:25,568 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:55:25,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-10 02:55:25,775 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,SelfDestructingSolverStorable41 [2022-02-10 02:55:25,775 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:55:25,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:55:25,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1513867286, now seen corresponding path program 31 times [2022-02-10 02:55:25,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:55:25,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416903856] [2022-02-10 02:55:25,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:55:25,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:55:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:55:25,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:55:25,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:55:25,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416903856] [2022-02-10 02:55:25,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416903856] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:55:25,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775287327] [2022-02-10 02:55:25,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 02:55:25,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:55:25,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:55:25,882 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:55:25,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-10 02:55:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:55:25,905 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 02:55:25,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:55:26,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:55:26,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-10 02:55:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:55:26,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:55:27,111 INFO L353 Elim1Store]: treesize reduction 20, result has 93.1 percent of original size [2022-02-10 02:55:27,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 21 treesize of output 300 [2022-02-10 02:55:40,882 INFO L353 Elim1Store]: treesize reduction 15, result has 91.1 percent of original size [2022-02-10 02:55:40,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 17 treesize of output 177 [2022-02-10 02:55:41,648 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-10 02:55:41,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-10 02:55:45,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:55:45,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775287327] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:55:45,382 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:55:45,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-10 02:55:45,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904832343] [2022-02-10 02:55:45,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:55:45,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 02:55:45,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:55:45,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 02:55:45,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-02-10 02:55:45,383 INFO L87 Difference]: Start difference. First operand 126 states and 376 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:55:45,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:55:45,676 INFO L93 Difference]: Finished difference Result 156 states and 416 transitions. [2022-02-10 02:55:45,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 02:55:45,676 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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 15 [2022-02-10 02:55:45,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:55:45,676 INFO L225 Difference]: With dead ends: 156 [2022-02-10 02:55:45,677 INFO L226 Difference]: Without dead ends: 148 [2022-02-10 02:55:45,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2022-02-10 02:55:45,677 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:55:45,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 43 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:55:45,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-02-10 02:55:45,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 127. [2022-02-10 02:55:45,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.992063492063492) internal successors, (377), 126 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:55:45,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 377 transitions. [2022-02-10 02:55:45,682 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 377 transitions. Word has length 15 [2022-02-10 02:55:45,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:55:45,683 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 377 transitions. [2022-02-10 02:55:45,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:55:45,683 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 377 transitions. [2022-02-10 02:55:45,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 02:55:45,684 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:55:45,684 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:55:45,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-10 02:55:45,900 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,SelfDestructingSolverStorable42 [2022-02-10 02:55:45,900 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:55:45,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:55:45,900 INFO L85 PathProgramCache]: Analyzing trace with hash 437236272, now seen corresponding path program 32 times [2022-02-10 02:55:45,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:55:45,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835329723] [2022-02-10 02:55:45,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:55:45,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:55:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:55:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:55:46,044 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:55:46,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835329723] [2022-02-10 02:55:46,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835329723] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:55:46,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970381650] [2022-02-10 02:55:46,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 02:55:46,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:55:46,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:55:46,046 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:55:46,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-10 02:55:46,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 02:55:46,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:55:46,079 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 02:55:46,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:55:46,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:55:46,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-02-10 02:55:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:55:46,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:55:46,756 INFO L353 Elim1Store]: treesize reduction 20, result has 93.1 percent of original size [2022-02-10 02:55:46,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 21 treesize of output 300 [2022-02-10 02:55:50,275 INFO L353 Elim1Store]: treesize reduction 15, result has 91.1 percent of original size [2022-02-10 02:55:50,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 17 treesize of output 177 [2022-02-10 02:55:52,165 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-10 02:55:52,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-10 02:55:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:55:54,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970381650] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:55:54,429 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:55:54,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-02-10 02:55:54,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824398473] [2022-02-10 02:55:54,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:55:54,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-10 02:55:54,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:55:54,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-10 02:55:54,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-02-10 02:55:54,430 INFO L87 Difference]: Start difference. First operand 127 states and 377 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:55:55,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:55:55,217 INFO L93 Difference]: Finished difference Result 233 states and 562 transitions. [2022-02-10 02:55:55,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-10 02:55:55,218 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 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 15 [2022-02-10 02:55:55,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:55:55,219 INFO L225 Difference]: With dead ends: 233 [2022-02-10 02:55:55,219 INFO L226 Difference]: Without dead ends: 219 [2022-02-10 02:55:55,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2022-02-10 02:55:55,219 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 02:55:55,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 115 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 02:55:55,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-02-10 02:55:55,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 149. [2022-02-10 02:55:55,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 3.0878378378378377) internal successors, (457), 148 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) [2022-02-10 02:55:55,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 457 transitions. [2022-02-10 02:55:55,223 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 457 transitions. Word has length 15 [2022-02-10 02:55:55,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:55:55,223 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 457 transitions. [2022-02-10 02:55:55,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:55:55,223 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 457 transitions. [2022-02-10 02:55:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 02:55:55,224 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:55:55,224 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:55:55,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-02-10 02:55:55,442 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,SelfDestructingSolverStorable43 [2022-02-10 02:55:55,442 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:55:55,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:55:55,443 INFO L85 PathProgramCache]: Analyzing trace with hash -2139981964, now seen corresponding path program 33 times [2022-02-10 02:55:55,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:55:55,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142764942] [2022-02-10 02:55:55,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:55:55,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:55:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:55:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:55:55,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:55:55,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142764942] [2022-02-10 02:55:55,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142764942] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:55:55,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586394311] [2022-02-10 02:55:55,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 02:55:55,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:55:55,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:55:55,536 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:55:55,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-10 02:55:55,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 02:55:55,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:55:55,562 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 02:55:55,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:55:55,680 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:55:55,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-10 02:55:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:55:55,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:55:56,148 INFO L353 Elim1Store]: treesize reduction 20, result has 93.1 percent of original size [2022-02-10 02:55:56,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 21 treesize of output 300 [2022-02-10 02:56:01,019 INFO L353 Elim1Store]: treesize reduction 15, result has 91.1 percent of original size [2022-02-10 02:56:01,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 17 treesize of output 177 [2022-02-10 02:56:01,829 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-10 02:56:01,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-10 02:56:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:56:06,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586394311] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:56:06,084 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:56:06,084 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-10 02:56:06,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182808191] [2022-02-10 02:56:06,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:56:06,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-10 02:56:06,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:56:06,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-10 02:56:06,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-02-10 02:56:06,085 INFO L87 Difference]: Start difference. First operand 149 states and 457 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:56:07,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:56:07,115 INFO L93 Difference]: Finished difference Result 230 states and 560 transitions. [2022-02-10 02:56:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-10 02:56:07,116 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 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 15 [2022-02-10 02:56:07,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:56:07,117 INFO L225 Difference]: With dead ends: 230 [2022-02-10 02:56:07,117 INFO L226 Difference]: Without dead ends: 222 [2022-02-10 02:56:07,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=242, Invalid=1240, Unknown=0, NotChecked=0, Total=1482 [2022-02-10 02:56:07,117 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 64 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 02:56:07,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 127 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 02:56:07,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-02-10 02:56:07,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 149. [2022-02-10 02:56:07,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 3.0878378378378377) internal successors, (457), 148 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) [2022-02-10 02:56:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 457 transitions. [2022-02-10 02:56:07,121 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 457 transitions. Word has length 15 [2022-02-10 02:56:07,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:56:07,121 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 457 transitions. [2022-02-10 02:56:07,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:56:07,121 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 457 transitions. [2022-02-10 02:56:07,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 02:56:07,129 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:56:07,129 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:56:07,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-10 02:56:07,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:56:07,330 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:56:07,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:56:07,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1284675310, now seen corresponding path program 34 times [2022-02-10 02:56:07,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:56:07,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628348347] [2022-02-10 02:56:07,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:56:07,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:56:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:56:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:56:07,396 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:56:07,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628348347] [2022-02-10 02:56:07,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628348347] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:56:07,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289741297] [2022-02-10 02:56:07,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 02:56:07,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:56:07,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:56:07,398 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:56:07,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-10 02:56:07,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 02:56:07,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:56:07,418 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 02:56:07,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:56:07,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:56:07,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-10 02:56:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:56:07,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:56:08,090 INFO L353 Elim1Store]: treesize reduction 20, result has 93.1 percent of original size [2022-02-10 02:56:08,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 21 treesize of output 300 [2022-02-10 02:56:10,259 INFO L353 Elim1Store]: treesize reduction 15, result has 91.1 percent of original size [2022-02-10 02:56:10,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 17 treesize of output 177 [2022-02-10 02:56:12,416 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-10 02:56:12,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-10 02:56:18,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:56:18,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289741297] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:56:18,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:56:18,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-02-10 02:56:18,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203228606] [2022-02-10 02:56:18,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:56:18,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-10 02:56:18,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:56:18,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-10 02:56:18,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-02-10 02:56:18,198 INFO L87 Difference]: Start difference. First operand 149 states and 457 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:56:19,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:56:19,086 INFO L93 Difference]: Finished difference Result 244 states and 597 transitions. [2022-02-10 02:56:19,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-10 02:56:19,092 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) 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 15 [2022-02-10 02:56:19,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:56:19,093 INFO L225 Difference]: With dead ends: 244 [2022-02-10 02:56:19,093 INFO L226 Difference]: Without dead ends: 232 [2022-02-10 02:56:19,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=320, Invalid=1750, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 02:56:19,094 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 75 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 02:56:19,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 76 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 02:56:19,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-02-10 02:56:19,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 155. [2022-02-10 02:56:19,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 3.103896103896104) internal successors, (478), 154 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:56:19,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 478 transitions. [2022-02-10 02:56:19,100 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 478 transitions. Word has length 15 [2022-02-10 02:56:19,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:56:19,100 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 478 transitions. [2022-02-10 02:56:19,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:56:19,100 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 478 transitions. [2022-02-10 02:56:19,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 02:56:19,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:56:19,100 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:56:19,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-10 02:56:19,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:56:19,301 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:56:19,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:56:19,301 INFO L85 PathProgramCache]: Analyzing trace with hash -539972812, now seen corresponding path program 35 times [2022-02-10 02:56:19,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:56:19,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709441285] [2022-02-10 02:56:19,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:56:19,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:56:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:56:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:56:19,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:56:19,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709441285] [2022-02-10 02:56:19,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709441285] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:56:19,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221015462] [2022-02-10 02:56:19,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 02:56:19,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:56:19,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:56:19,406 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:56:19,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-10 02:56:19,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 02:56:19,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:56:19,432 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 02:56:19,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:56:19,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:56:19,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-10 02:56:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:56:20,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:56:20,578 INFO L353 Elim1Store]: treesize reduction 20, result has 93.1 percent of original size [2022-02-10 02:56:20,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 21 treesize of output 300 [2022-02-10 02:56:36,137 INFO L353 Elim1Store]: treesize reduction 15, result has 91.1 percent of original size [2022-02-10 02:56:36,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 17 treesize of output 177 [2022-02-10 02:56:38,270 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-10 02:56:38,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-10 02:56:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:56:42,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221015462] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:56:42,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:56:42,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-02-10 02:56:42,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125037649] [2022-02-10 02:56:42,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:56:42,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-10 02:56:42,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:56:42,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-10 02:56:42,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-10 02:56:42,842 INFO L87 Difference]: Start difference. First operand 155 states and 478 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:56:43,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:56:43,683 INFO L93 Difference]: Finished difference Result 239 states and 596 transitions. [2022-02-10 02:56:43,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-10 02:56:43,684 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) 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 15 [2022-02-10 02:56:43,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:56:43,685 INFO L225 Difference]: With dead ends: 239 [2022-02-10 02:56:43,685 INFO L226 Difference]: Without dead ends: 219 [2022-02-10 02:56:43,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=435, Invalid=1917, Unknown=0, NotChecked=0, Total=2352 [2022-02-10 02:56:43,691 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 63 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 02:56:43,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 60 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 02:56:43,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-02-10 02:56:43,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 156. [2022-02-10 02:56:43,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 3.109677419354839) internal successors, (482), 155 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:56:43,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 482 transitions. [2022-02-10 02:56:43,702 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 482 transitions. Word has length 15 [2022-02-10 02:56:43,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:56:43,702 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 482 transitions. [2022-02-10 02:56:43,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:56:43,703 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 482 transitions. [2022-02-10 02:56:43,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 02:56:43,703 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:56:43,703 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:56:43,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-02-10 02:56:43,919 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,SelfDestructingSolverStorable46 [2022-02-10 02:56:43,919 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:56:43,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:56:43,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1070968146, now seen corresponding path program 36 times [2022-02-10 02:56:43,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:56:43,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489486609] [2022-02-10 02:56:43,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:56:43,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:56:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:56:44,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:56:44,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:56:44,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489486609] [2022-02-10 02:56:44,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489486609] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:56:44,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725454433] [2022-02-10 02:56:44,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 02:56:44,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:56:44,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:56:44,008 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:56:44,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-10 02:56:44,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 02:56:44,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:56:44,033 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 02:56:44,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:56:44,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:56:44,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-10 02:56:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:56:44,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:56:45,210 INFO L353 Elim1Store]: treesize reduction 20, result has 93.1 percent of original size [2022-02-10 02:56:45,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 21 treesize of output 300 [2022-02-10 02:57:03,597 INFO L353 Elim1Store]: treesize reduction 15, result has 91.1 percent of original size [2022-02-10 02:57:03,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 17 treesize of output 177 [2022-02-10 02:57:05,010 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-10 02:57:05,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-10 02:57:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:57:12,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725454433] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:57:12,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:57:12,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-02-10 02:57:12,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818363138] [2022-02-10 02:57:12,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:57:12,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-10 02:57:12,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:57:12,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-10 02:57:12,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-02-10 02:57:12,083 INFO L87 Difference]: Start difference. First operand 156 states and 482 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:57:12,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:57:12,514 INFO L93 Difference]: Finished difference Result 200 states and 544 transitions. [2022-02-10 02:57:12,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 02:57:12,514 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) 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 15 [2022-02-10 02:57:12,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:57:12,515 INFO L225 Difference]: With dead ends: 200 [2022-02-10 02:57:12,515 INFO L226 Difference]: Without dead ends: 192 [2022-02-10 02:57:12,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 02:57:12,516 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 43 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:57:12,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 29 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:57:12,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-02-10 02:57:12,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 156. [2022-02-10 02:57:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 3.109677419354839) internal successors, (482), 155 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:57:12,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 482 transitions. [2022-02-10 02:57:12,520 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 482 transitions. Word has length 15 [2022-02-10 02:57:12,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:57:12,520 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 482 transitions. [2022-02-10 02:57:12,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:57:12,520 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 482 transitions. [2022-02-10 02:57:12,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-10 02:57:12,521 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:57:12,521 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:57:12,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-02-10 02:57:12,737 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,SelfDestructingSolverStorable47 [2022-02-10 02:57:12,738 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:57:12,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:57:12,738 INFO L85 PathProgramCache]: Analyzing trace with hash -529469708, now seen corresponding path program 37 times [2022-02-10 02:57:12,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:57:12,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637216067] [2022-02-10 02:57:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:57:12,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:57:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:57:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:57:12,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:57:12,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637216067] [2022-02-10 02:57:12,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637216067] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:57:12,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471533797] [2022-02-10 02:57:12,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 02:57:12,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:57:12,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:57:12,839 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:57:12,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-10 02:57:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:57:12,862 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-10 02:57:12,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:57:13,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:57:13,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 112 [2022-02-10 02:57:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:57:13,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:57:13,838 INFO L353 Elim1Store]: treesize reduction 20, result has 93.1 percent of original size [2022-02-10 02:57:13,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 21 treesize of output 300 [2022-02-10 02:57:24,395 INFO L353 Elim1Store]: treesize reduction 15, result has 91.1 percent of original size [2022-02-10 02:57:24,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 17 treesize of output 177 [2022-02-10 02:57:26,672 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-02-10 02:57:26,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-02-10 02:57:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:57:31,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471533797] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:57:31,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:57:31,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-02-10 02:57:31,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106025986] [2022-02-10 02:57:31,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:57:31,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-10 02:57:31,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:57:31,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-10 02:57:31,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-02-10 02:57:31,943 INFO L87 Difference]: Start difference. First operand 156 states and 482 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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) [2022-02-10 02:57:32,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:57:32,466 INFO L93 Difference]: Finished difference Result 196 states and 534 transitions. [2022-02-10 02:57:32,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 02:57:32,467 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 15 [2022-02-10 02:57:32,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:57:32,468 INFO L225 Difference]: With dead ends: 196 [2022-02-10 02:57:32,468 INFO L226 Difference]: Without dead ends: 188 [2022-02-10 02:57:32,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2022-02-10 02:57:32,468 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 47 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:57:32,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 46 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:57:32,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-10 02:57:32,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 157. [2022-02-10 02:57:32,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 3.0961538461538463) internal successors, (483), 156 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:57:32,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 483 transitions. [2022-02-10 02:57:32,472 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 483 transitions. Word has length 15 [2022-02-10 02:57:32,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:57:32,472 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 483 transitions. [2022-02-10 02:57:32,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) 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) [2022-02-10 02:57:32,472 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 483 transitions. [2022-02-10 02:57:32,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 02:57:32,472 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:57:32,472 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:57:32,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-10 02:57:32,681 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,SelfDestructingSolverStorable48 [2022-02-10 02:57:32,681 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:57:32,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:57:32,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1842206323, now seen corresponding path program 38 times [2022-02-10 02:57:32,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:57:32,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678343009] [2022-02-10 02:57:32,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:57:32,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:57:32,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:57:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:57:32,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:57:32,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678343009] [2022-02-10 02:57:32,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678343009] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:57:32,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055142806] [2022-02-10 02:57:32,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 02:57:32,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:57:32,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:57:32,777 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:57:32,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-10 02:57:32,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 02:57:32,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:57:32,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-10 02:57:32,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:57:33,033 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:57:33,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 129 [2022-02-10 02:57:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:57:33,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:57:33,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:57:33,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 74 treesize of output 413 [2022-02-10 02:58:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:11,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055142806] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:11,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:11,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-02-10 02:58:11,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646758418] [2022-02-10 02:58:11,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:11,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-10 02:58:11,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:11,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-10 02:58:11,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-02-10 02:58:11,673 INFO L87 Difference]: Start difference. First operand 157 states and 483 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:11,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:11,998 INFO L93 Difference]: Finished difference Result 209 states and 562 transitions. [2022-02-10 02:58:11,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 02:58:11,999 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 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 [2022-02-10 02:58:11,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:11,999 INFO L225 Difference]: With dead ends: 209 [2022-02-10 02:58:11,999 INFO L226 Difference]: Without dead ends: 205 [2022-02-10 02:58:12,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-02-10 02:58:12,000 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:12,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 144 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-10 02:58:12,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-02-10 02:58:12,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 162. [2022-02-10 02:58:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 3.124223602484472) internal successors, (503), 161 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) [2022-02-10 02:58:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 503 transitions. [2022-02-10 02:58:12,003 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 503 transitions. Word has length 16 [2022-02-10 02:58:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:12,004 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 503 transitions. [2022-02-10 02:58:12,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:12,004 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 503 transitions. [2022-02-10 02:58:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 02:58:12,004 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:12,004 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:12,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:12,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:12,205 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:12,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:12,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1255400309, now seen corresponding path program 39 times [2022-02-10 02:58:12,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:12,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940585362] [2022-02-10 02:58:12,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:12,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:12,244 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:12,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940585362] [2022-02-10 02:58:12,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940585362] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:12,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105302897] [2022-02-10 02:58:12,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 02:58:12,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:12,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:12,256 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:12,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-10 02:58:12,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 02:58:12,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:12,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-10 02:58:12,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 02:58:12,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 02:58:12,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105302897] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:12,354 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:12,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-02-10 02:58:12,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395351893] [2022-02-10 02:58:12,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:12,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-10 02:58:12,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:12,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-10 02:58:12,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-02-10 02:58:12,355 INFO L87 Difference]: Start difference. First operand 162 states and 503 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:12,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:12,422 INFO L93 Difference]: Finished difference Result 240 states and 617 transitions. [2022-02-10 02:58:12,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-10 02:58:12,423 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-10 02:58:12,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:12,424 INFO L225 Difference]: With dead ends: 240 [2022-02-10 02:58:12,424 INFO L226 Difference]: Without dead ends: 240 [2022-02-10 02:58:12,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-02-10 02:58:12,424 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:12,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 43 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:58:12,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-10 02:58:12,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 161. [2022-02-10 02:58:12,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 3.0375) internal successors, (486), 160 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:12,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 486 transitions. [2022-02-10 02:58:12,427 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 486 transitions. Word has length 16 [2022-02-10 02:58:12,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:12,428 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 486 transitions. [2022-02-10 02:58:12,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:12,428 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 486 transitions. [2022-02-10 02:58:12,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-10 02:58:12,428 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:12,428 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:12,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:12,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:12,629 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:12,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:12,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1276406517, now seen corresponding path program 40 times [2022-02-10 02:58:12,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:12,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625949347] [2022-02-10 02:58:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:12,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:12,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:12,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625949347] [2022-02-10 02:58:12,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625949347] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:12,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369115505] [2022-02-10 02:58:12,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 02:58:12,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:12,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:12,670 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:12,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-10 02:58:12,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 02:58:12,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:12,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-10 02:58:12,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:12,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:12,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369115505] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:12,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:12,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-02-10 02:58:12,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368371638] [2022-02-10 02:58:12,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:12,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-10 02:58:12,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:12,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-10 02:58:12,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-10 02:58:12,780 INFO L87 Difference]: Start difference. First operand 161 states and 486 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:12,937 INFO L93 Difference]: Finished difference Result 251 states and 608 transitions. [2022-02-10 02:58:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 02:58:12,937 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-10 02:58:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:12,938 INFO L225 Difference]: With dead ends: 251 [2022-02-10 02:58:12,938 INFO L226 Difference]: Without dead ends: 251 [2022-02-10 02:58:12,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2022-02-10 02:58:12,939 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 73 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:12,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 55 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:58:12,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-02-10 02:58:12,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 170. [2022-02-10 02:58:12,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 3.0473372781065087) internal successors, (515), 169 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) [2022-02-10 02:58:12,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 515 transitions. [2022-02-10 02:58:12,942 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 515 transitions. Word has length 16 [2022-02-10 02:58:12,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:12,942 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 515 transitions. [2022-02-10 02:58:12,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:12,942 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 515 transitions. [2022-02-10 02:58:12,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:12,942 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:12,942 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:12,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:13,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:13,143 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:13,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:13,144 INFO L85 PathProgramCache]: Analyzing trace with hash 938419154, now seen corresponding path program 41 times [2022-02-10 02:58:13,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:13,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983624401] [2022-02-10 02:58:13,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:13,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:13,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:13,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983624401] [2022-02-10 02:58:13,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983624401] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:13,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852411457] [2022-02-10 02:58:13,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 02:58:13,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:13,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:13,190 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:13,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-10 02:58:13,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 02:58:13,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:13,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:13,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:13,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:13,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852411457] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:13,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:13,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-02-10 02:58:13,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402103588] [2022-02-10 02:58:13,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:13,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-10 02:58:13,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:13,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-10 02:58:13,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-10 02:58:13,297 INFO L87 Difference]: Start difference. First operand 170 states and 515 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:13,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:13,442 INFO L93 Difference]: Finished difference Result 250 states and 619 transitions. [2022-02-10 02:58:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-10 02:58:13,443 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2022-02-10 02:58:13,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:13,444 INFO L225 Difference]: With dead ends: 250 [2022-02-10 02:58:13,444 INFO L226 Difference]: Without dead ends: 247 [2022-02-10 02:58:13,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2022-02-10 02:58:13,444 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:13,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 43 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:58:13,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-02-10 02:58:13,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 162. [2022-02-10 02:58:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 3.031055900621118) internal successors, (488), 161 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:13,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 488 transitions. [2022-02-10 02:58:13,453 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 488 transitions. Word has length 17 [2022-02-10 02:58:13,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:13,453 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 488 transitions. [2022-02-10 02:58:13,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:13,453 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 488 transitions. [2022-02-10 02:58:13,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:13,453 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:13,453 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:13,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:13,655 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,SelfDestructingSolverStorable52 [2022-02-10 02:58:13,655 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:13,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:13,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1802499018, now seen corresponding path program 42 times [2022-02-10 02:58:13,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:13,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130297328] [2022-02-10 02:58:13,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:13,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:13,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:13,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130297328] [2022-02-10 02:58:13,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130297328] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:13,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102790437] [2022-02-10 02:58:13,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 02:58:13,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:13,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:13,735 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:13,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-10 02:58:13,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 02:58:13,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:13,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:13,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:13,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:13,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102790437] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:13,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:13,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-02-10 02:58:13,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656006553] [2022-02-10 02:58:13,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:13,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-10 02:58:13,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:13,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-10 02:58:13,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-10 02:58:13,863 INFO L87 Difference]: Start difference. First operand 162 states and 488 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:13,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:13,983 INFO L93 Difference]: Finished difference Result 244 states and 598 transitions. [2022-02-10 02:58:13,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 02:58:13,984 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2022-02-10 02:58:13,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:13,985 INFO L225 Difference]: With dead ends: 244 [2022-02-10 02:58:13,985 INFO L226 Difference]: Without dead ends: 242 [2022-02-10 02:58:13,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-02-10 02:58:13,985 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:13,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 88 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:58:13,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-10 02:58:13,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 174. [2022-02-10 02:58:13,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 3.005780346820809) internal successors, (520), 173 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:13,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 520 transitions. [2022-02-10 02:58:13,989 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 520 transitions. Word has length 17 [2022-02-10 02:58:13,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:13,989 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 520 transitions. [2022-02-10 02:58:13,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:13,989 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 520 transitions. [2022-02-10 02:58:13,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:13,989 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:13,989 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:14,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:14,191 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,SelfDestructingSolverStorable53 [2022-02-10 02:58:14,191 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:14,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:14,192 INFO L85 PathProgramCache]: Analyzing trace with hash 530914358, now seen corresponding path program 43 times [2022-02-10 02:58:14,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:14,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899150669] [2022-02-10 02:58:14,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:14,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:14,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:14,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899150669] [2022-02-10 02:58:14,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899150669] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:14,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225906040] [2022-02-10 02:58:14,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 02:58:14,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:14,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:14,238 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:14,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-10 02:58:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:14,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:14,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:14,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:14,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225906040] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:14,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:14,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-02-10 02:58:14,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620899301] [2022-02-10 02:58:14,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:14,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 02:58:14,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:14,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 02:58:14,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-10 02:58:14,325 INFO L87 Difference]: Start difference. First operand 174 states and 520 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:14,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:14,413 INFO L93 Difference]: Finished difference Result 195 states and 541 transitions. [2022-02-10 02:58:14,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 02:58:14,414 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2022-02-10 02:58:14,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:14,414 INFO L225 Difference]: With dead ends: 195 [2022-02-10 02:58:14,414 INFO L226 Difference]: Without dead ends: 193 [2022-02-10 02:58:14,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-02-10 02:58:14,415 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:14,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 22 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:58:14,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-02-10 02:58:14,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 175. [2022-02-10 02:58:14,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.9655172413793105) internal successors, (516), 174 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) [2022-02-10 02:58:14,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 516 transitions. [2022-02-10 02:58:14,418 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 516 transitions. Word has length 17 [2022-02-10 02:58:14,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:14,418 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 516 transitions. [2022-02-10 02:58:14,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:14,418 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 516 transitions. [2022-02-10 02:58:14,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:14,418 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:14,418 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:14,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:14,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:14,619 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:14,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:14,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1443479314, now seen corresponding path program 44 times [2022-02-10 02:58:14,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:14,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104295004] [2022-02-10 02:58:14,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:14,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:14,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:14,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104295004] [2022-02-10 02:58:14,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104295004] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:14,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660039450] [2022-02-10 02:58:14,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 02:58:14,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:14,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:14,668 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:14,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-10 02:58:14,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 02:58:14,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:14,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:14,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:14,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:14,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660039450] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:14,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:14,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-02-10 02:58:14,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105431052] [2022-02-10 02:58:14,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:14,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 02:58:14,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:14,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 02:58:14,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-02-10 02:58:14,764 INFO L87 Difference]: Start difference. First operand 175 states and 516 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:14,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:14,817 INFO L93 Difference]: Finished difference Result 250 states and 603 transitions. [2022-02-10 02:58:14,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 02:58:14,817 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2022-02-10 02:58:14,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:14,818 INFO L225 Difference]: With dead ends: 250 [2022-02-10 02:58:14,818 INFO L226 Difference]: Without dead ends: 250 [2022-02-10 02:58:14,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-02-10 02:58:14,818 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 46 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:14,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 37 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:58:14,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-02-10 02:58:14,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 176. [2022-02-10 02:58:14,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.9657142857142857) internal successors, (519), 175 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:14,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 519 transitions. [2022-02-10 02:58:14,827 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 519 transitions. Word has length 17 [2022-02-10 02:58:14,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:14,827 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 519 transitions. [2022-02-10 02:58:14,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:14,828 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 519 transitions. [2022-02-10 02:58:14,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:14,828 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:14,828 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:14,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:15,045 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,SelfDestructingSolverStorable55 [2022-02-10 02:58:15,046 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:15,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:15,046 INFO L85 PathProgramCache]: Analyzing trace with hash 202531476, now seen corresponding path program 45 times [2022-02-10 02:58:15,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:15,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60259091] [2022-02-10 02:58:15,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:15,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:15,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:15,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60259091] [2022-02-10 02:58:15,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60259091] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:15,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908191489] [2022-02-10 02:58:15,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 02:58:15,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:15,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:15,123 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:15,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-10 02:58:15,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-10 02:58:15,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:15,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:15,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:15,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:15,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908191489] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:15,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:15,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-02-10 02:58:15,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092333720] [2022-02-10 02:58:15,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:15,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 02:58:15,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:15,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 02:58:15,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-02-10 02:58:15,220 INFO L87 Difference]: Start difference. First operand 176 states and 519 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:15,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:15,337 INFO L93 Difference]: Finished difference Result 213 states and 586 transitions. [2022-02-10 02:58:15,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 02:58:15,337 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2022-02-10 02:58:15,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:15,338 INFO L225 Difference]: With dead ends: 213 [2022-02-10 02:58:15,338 INFO L226 Difference]: Without dead ends: 211 [2022-02-10 02:58:15,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-02-10 02:58:15,339 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:15,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:58:15,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-02-10 02:58:15,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 177. [2022-02-10 02:58:15,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.9488636363636362) internal successors, (519), 176 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:15,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 519 transitions. [2022-02-10 02:58:15,342 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 519 transitions. Word has length 17 [2022-02-10 02:58:15,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:15,342 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 519 transitions. [2022-02-10 02:58:15,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:15,343 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 519 transitions. [2022-02-10 02:58:15,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:15,343 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:15,343 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:15,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-02-10 02:58:15,559 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,SelfDestructingSolverStorable56 [2022-02-10 02:58:15,559 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:15,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:15,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1387403274, now seen corresponding path program 46 times [2022-02-10 02:58:15,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:15,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661405357] [2022-02-10 02:58:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:15,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:15,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:15,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:15,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661405357] [2022-02-10 02:58:15,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661405357] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:15,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154631828] [2022-02-10 02:58:15,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 02:58:15,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:15,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:15,605 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:15,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-10 02:58:15,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 02:58:15,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:15,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:15,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:15,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:15,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154631828] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:15,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:15,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-02-10 02:58:15,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994527964] [2022-02-10 02:58:15,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:15,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 02:58:15,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:15,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 02:58:15,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-10 02:58:15,655 INFO L87 Difference]: Start difference. First operand 177 states and 519 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:15,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:15,703 INFO L93 Difference]: Finished difference Result 210 states and 573 transitions. [2022-02-10 02:58:15,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 02:58:15,703 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2022-02-10 02:58:15,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:15,704 INFO L225 Difference]: With dead ends: 210 [2022-02-10 02:58:15,704 INFO L226 Difference]: Without dead ends: 207 [2022-02-10 02:58:15,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-02-10 02:58:15,705 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 34 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:15,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 16 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:58:15,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-02-10 02:58:15,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 179. [2022-02-10 02:58:15,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.9213483146067416) internal successors, (520), 178 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:15,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 520 transitions. [2022-02-10 02:58:15,708 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 520 transitions. Word has length 17 [2022-02-10 02:58:15,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:15,708 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 520 transitions. [2022-02-10 02:58:15,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:15,708 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 520 transitions. [2022-02-10 02:58:15,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:15,708 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:15,708 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:15,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:15,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:15,941 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:15,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:15,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1544333580, now seen corresponding path program 47 times [2022-02-10 02:58:15,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:15,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457732616] [2022-02-10 02:58:15,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:15,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 02:58:16,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:16,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457732616] [2022-02-10 02:58:16,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457732616] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:16,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428821965] [2022-02-10 02:58:16,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 02:58:16,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:16,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:16,011 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:16,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-10 02:58:16,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 02:58:16,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:16,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:16,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 02:58:16,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 02:58:16,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428821965] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:16,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:16,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-10 02:58:16,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310999836] [2022-02-10 02:58:16,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:16,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-10 02:58:16,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:16,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-10 02:58:16,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-10 02:58:16,096 INFO L87 Difference]: Start difference. First operand 179 states and 520 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:16,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:16,189 INFO L93 Difference]: Finished difference Result 250 states and 646 transitions. [2022-02-10 02:58:16,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-10 02:58:16,190 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-10 02:58:16,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:16,190 INFO L225 Difference]: With dead ends: 250 [2022-02-10 02:58:16,190 INFO L226 Difference]: Without dead ends: 249 [2022-02-10 02:58:16,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-10 02:58:16,191 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:16,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 46 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:58:16,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-02-10 02:58:16,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 204. [2022-02-10 02:58:16,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9408866995073892) internal successors, (597), 203 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) [2022-02-10 02:58:16,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 597 transitions. [2022-02-10 02:58:16,194 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 597 transitions. Word has length 17 [2022-02-10 02:58:16,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:16,195 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 597 transitions. [2022-02-10 02:58:16,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:16,195 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 597 transitions. [2022-02-10 02:58:16,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:16,195 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:16,195 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:16,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:16,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:16,397 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:16,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:16,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1830933008, now seen corresponding path program 48 times [2022-02-10 02:58:16,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:16,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016148059] [2022-02-10 02:58:16,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:16,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 02:58:16,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:16,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016148059] [2022-02-10 02:58:16,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016148059] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:16,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363560154] [2022-02-10 02:58:16,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 02:58:16,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:16,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:16,452 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:16,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-10 02:58:16,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 02:58:16,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:16,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:16,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 02:58:16,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 02:58:16,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363560154] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:16,549 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:16,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-10 02:58:16,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705578369] [2022-02-10 02:58:16,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:16,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-10 02:58:16,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:16,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-10 02:58:16,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-10 02:58:16,550 INFO L87 Difference]: Start difference. First operand 204 states and 597 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:16,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:16,627 INFO L93 Difference]: Finished difference Result 287 states and 738 transitions. [2022-02-10 02:58:16,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-10 02:58:16,627 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-10 02:58:16,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:16,629 INFO L225 Difference]: With dead ends: 287 [2022-02-10 02:58:16,629 INFO L226 Difference]: Without dead ends: 287 [2022-02-10 02:58:16,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-02-10 02:58:16,630 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:16,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 46 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:58:16,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-02-10 02:58:16,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 214. [2022-02-10 02:58:16,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.976525821596244) internal successors, (634), 213 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:16,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 634 transitions. [2022-02-10 02:58:16,633 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 634 transitions. Word has length 17 [2022-02-10 02:58:16,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:16,634 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 634 transitions. [2022-02-10 02:58:16,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:16,634 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 634 transitions. [2022-02-10 02:58:16,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:16,634 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:16,634 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:16,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:16,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-10 02:58:16,847 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:16,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:16,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1830302414, now seen corresponding path program 49 times [2022-02-10 02:58:16,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:16,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305653019] [2022-02-10 02:58:16,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:16,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:16,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:16,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305653019] [2022-02-10 02:58:16,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305653019] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:16,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419721378] [2022-02-10 02:58:16,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 02:58:16,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:16,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:16,924 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:16,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-10 02:58:16,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:16,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:16,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:17,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419721378] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:17,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:17,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-02-10 02:58:17,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802923841] [2022-02-10 02:58:17,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:17,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 02:58:17,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:17,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 02:58:17,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-10 02:58:17,011 INFO L87 Difference]: Start difference. First operand 214 states and 634 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:17,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:17,114 INFO L93 Difference]: Finished difference Result 267 states and 715 transitions. [2022-02-10 02:58:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 02:58:17,115 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2022-02-10 02:58:17,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:17,116 INFO L225 Difference]: With dead ends: 267 [2022-02-10 02:58:17,116 INFO L226 Difference]: Without dead ends: 261 [2022-02-10 02:58:17,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-02-10 02:58:17,116 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 36 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:17,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 22 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:58:17,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-02-10 02:58:17,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 216. [2022-02-10 02:58:17,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.953488372093023) internal successors, (635), 215 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:17,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 635 transitions. [2022-02-10 02:58:17,121 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 635 transitions. Word has length 17 [2022-02-10 02:58:17,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:17,121 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 635 transitions. [2022-02-10 02:58:17,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:17,122 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 635 transitions. [2022-02-10 02:58:17,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:17,122 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:17,122 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:17,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:17,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:17,323 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:17,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:17,323 INFO L85 PathProgramCache]: Analyzing trace with hash 864227028, now seen corresponding path program 50 times [2022-02-10 02:58:17,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:17,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790827433] [2022-02-10 02:58:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:17,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:17,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:17,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790827433] [2022-02-10 02:58:17,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790827433] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:17,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065941742] [2022-02-10 02:58:17,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 02:58:17,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:17,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:17,369 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:17,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-10 02:58:17,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 02:58:17,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:17,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:17,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:17,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:17,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065941742] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:17,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:17,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-02-10 02:58:17,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396171918] [2022-02-10 02:58:17,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:17,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-10 02:58:17,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:17,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-10 02:58:17,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-02-10 02:58:17,462 INFO L87 Difference]: Start difference. First operand 216 states and 635 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:17,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:17,567 INFO L93 Difference]: Finished difference Result 276 states and 728 transitions. [2022-02-10 02:58:17,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 02:58:17,567 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2022-02-10 02:58:17,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:17,568 INFO L225 Difference]: With dead ends: 276 [2022-02-10 02:58:17,568 INFO L226 Difference]: Without dead ends: 272 [2022-02-10 02:58:17,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-02-10 02:58:17,568 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 64 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:17,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 22 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:58:17,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-10 02:58:17,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 219. [2022-02-10 02:58:17,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.9311926605504586) internal successors, (639), 218 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) [2022-02-10 02:58:17,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 639 transitions. [2022-02-10 02:58:17,573 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 639 transitions. Word has length 17 [2022-02-10 02:58:17,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:17,573 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 639 transitions. [2022-02-10 02:58:17,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:17,573 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 639 transitions. [2022-02-10 02:58:17,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:17,574 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:17,574 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:17,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:17,791 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,SelfDestructingSolverStorable61 [2022-02-10 02:58:17,791 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:17,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:17,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1905662264, now seen corresponding path program 51 times [2022-02-10 02:58:17,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:17,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198058301] [2022-02-10 02:58:17,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:17,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:17,832 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:17,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198058301] [2022-02-10 02:58:17,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198058301] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:17,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754998887] [2022-02-10 02:58:17,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 02:58:17,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:17,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:17,834 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:17,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-10 02:58:17,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 02:58:17,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:17,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:17,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 02:58:17,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 02:58:17,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754998887] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:17,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:17,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-02-10 02:58:17,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291761324] [2022-02-10 02:58:17,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:17,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-10 02:58:17,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:17,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-10 02:58:17,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-02-10 02:58:17,928 INFO L87 Difference]: Start difference. First operand 219 states and 639 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2022-02-10 02:58:18,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:18,015 INFO L93 Difference]: Finished difference Result 296 states and 751 transitions. [2022-02-10 02:58:18,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 02:58:18,016 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 17 [2022-02-10 02:58:18,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:18,017 INFO L225 Difference]: With dead ends: 296 [2022-02-10 02:58:18,017 INFO L226 Difference]: Without dead ends: 294 [2022-02-10 02:58:18,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2022-02-10 02:58:18,017 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:18,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 40 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:58:18,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-02-10 02:58:18,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 207. [2022-02-10 02:58:18,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.907766990291262) internal successors, (599), 206 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) [2022-02-10 02:58:18,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 599 transitions. [2022-02-10 02:58:18,022 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 599 transitions. Word has length 17 [2022-02-10 02:58:18,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:18,022 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 599 transitions. [2022-02-10 02:58:18,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2022-02-10 02:58:18,022 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 599 transitions. [2022-02-10 02:58:18,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:18,023 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:18,023 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:18,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-02-10 02:58:18,232 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,SelfDestructingSolverStorable62 [2022-02-10 02:58:18,232 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:18,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:18,232 INFO L85 PathProgramCache]: Analyzing trace with hash 985961556, now seen corresponding path program 52 times [2022-02-10 02:58:18,233 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:18,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366195690] [2022-02-10 02:58:18,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:18,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:18,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:18,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366195690] [2022-02-10 02:58:18,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366195690] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:18,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85152003] [2022-02-10 02:58:18,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 02:58:18,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:18,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:18,310 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:18,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-10 02:58:18,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 02:58:18,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:18,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:18,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:18,357 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 02:58:18,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 02:58:18,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85152003] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:18,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:18,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-02-10 02:58:18,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107739385] [2022-02-10 02:58:18,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:18,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-10 02:58:18,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:18,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-10 02:58:18,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-02-10 02:58:18,383 INFO L87 Difference]: Start difference. First operand 207 states and 599 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2022-02-10 02:58:18,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:18,423 INFO L93 Difference]: Finished difference Result 322 states and 818 transitions. [2022-02-10 02:58:18,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-10 02:58:18,424 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 17 [2022-02-10 02:58:18,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:18,425 INFO L225 Difference]: With dead ends: 322 [2022-02-10 02:58:18,425 INFO L226 Difference]: Without dead ends: 322 [2022-02-10 02:58:18,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-02-10 02:58:18,425 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 51 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:18,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 43 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:58:18,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-02-10 02:58:18,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 229. [2022-02-10 02:58:18,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.995614035087719) internal successors, (683), 228 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 683 transitions. [2022-02-10 02:58:18,456 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 683 transitions. Word has length 17 [2022-02-10 02:58:18,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:18,457 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 683 transitions. [2022-02-10 02:58:18,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2022-02-10 02:58:18,457 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 683 transitions. [2022-02-10 02:58:18,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:18,457 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:18,457 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:18,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:18,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:18,683 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:18,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:18,683 INFO L85 PathProgramCache]: Analyzing trace with hash -735950026, now seen corresponding path program 53 times [2022-02-10 02:58:18,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:18,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187651750] [2022-02-10 02:58:18,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:18,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:18,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:18,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187651750] [2022-02-10 02:58:18,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187651750] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:18,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075795485] [2022-02-10 02:58:18,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 02:58:18,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:18,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:18,731 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:18,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-10 02:58:18,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 02:58:18,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:18,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:18,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 02:58:18,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 02:58:18,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075795485] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:18,810 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:18,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-02-10 02:58:18,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508934149] [2022-02-10 02:58:18,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:18,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-10 02:58:18,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:18,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-10 02:58:18,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-02-10 02:58:18,811 INFO L87 Difference]: Start difference. First operand 229 states and 683 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2022-02-10 02:58:18,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:18,877 INFO L93 Difference]: Finished difference Result 313 states and 806 transitions. [2022-02-10 02:58:18,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 02:58:18,877 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 17 [2022-02-10 02:58:18,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:18,879 INFO L225 Difference]: With dead ends: 313 [2022-02-10 02:58:18,879 INFO L226 Difference]: Without dead ends: 312 [2022-02-10 02:58:18,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2022-02-10 02:58:18,879 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:18,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 37 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:58:18,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-02-10 02:58:18,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 229. [2022-02-10 02:58:18,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.986842105263158) internal successors, (681), 228 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 681 transitions. [2022-02-10 02:58:18,884 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 681 transitions. Word has length 17 [2022-02-10 02:58:18,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:18,884 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 681 transitions. [2022-02-10 02:58:18,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2022-02-10 02:58:18,884 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 681 transitions. [2022-02-10 02:58:18,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:18,884 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:18,884 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:18,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:19,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:19,102 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:19,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:19,102 INFO L85 PathProgramCache]: Analyzing trace with hash 176614930, now seen corresponding path program 54 times [2022-02-10 02:58:19,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:19,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460236858] [2022-02-10 02:58:19,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:19,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:19,152 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:19,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460236858] [2022-02-10 02:58:19,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460236858] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:19,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95976937] [2022-02-10 02:58:19,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 02:58:19,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:19,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:19,173 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:19,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-10 02:58:19,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-10 02:58:19,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:19,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:19,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 02:58:19,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 02:58:19,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95976937] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:19,254 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:19,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-02-10 02:58:19,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680385893] [2022-02-10 02:58:19,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:19,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-10 02:58:19,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:19,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-10 02:58:19,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-02-10 02:58:19,255 INFO L87 Difference]: Start difference. First operand 229 states and 681 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2022-02-10 02:58:19,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:19,317 INFO L93 Difference]: Finished difference Result 289 states and 747 transitions. [2022-02-10 02:58:19,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-10 02:58:19,317 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 17 [2022-02-10 02:58:19,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:19,318 INFO L225 Difference]: With dead ends: 289 [2022-02-10 02:58:19,318 INFO L226 Difference]: Without dead ends: 289 [2022-02-10 02:58:19,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-02-10 02:58:19,320 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:19,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 64 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:58:19,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-02-10 02:58:19,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 230. [2022-02-10 02:58:19,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.978165938864629) internal successors, (682), 229 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 682 transitions. [2022-02-10 02:58:19,324 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 682 transitions. Word has length 17 [2022-02-10 02:58:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:19,324 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 682 transitions. [2022-02-10 02:58:19,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2022-02-10 02:58:19,324 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 682 transitions. [2022-02-10 02:58:19,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:19,325 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:19,325 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:19,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:19,538 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,SelfDestructingSolverStorable65 [2022-02-10 02:58:19,538 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:19,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:19,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1619693430, now seen corresponding path program 55 times [2022-02-10 02:58:19,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:19,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277602963] [2022-02-10 02:58:19,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:19,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:19,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:19,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277602963] [2022-02-10 02:58:19,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277602963] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:19,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112221974] [2022-02-10 02:58:19,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 02:58:19,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:19,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:19,582 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:19,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-10 02:58:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:19,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:19,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:19,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:19,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112221974] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:19,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:19,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-02-10 02:58:19,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157526704] [2022-02-10 02:58:19,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:19,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 02:58:19,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:19,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 02:58:19,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-02-10 02:58:19,673 INFO L87 Difference]: Start difference. First operand 230 states and 682 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:19,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:19,770 INFO L93 Difference]: Finished difference Result 299 states and 807 transitions. [2022-02-10 02:58:19,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 02:58:19,771 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2022-02-10 02:58:19,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:19,772 INFO L225 Difference]: With dead ends: 299 [2022-02-10 02:58:19,772 INFO L226 Difference]: Without dead ends: 294 [2022-02-10 02:58:19,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-02-10 02:58:19,773 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:19,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 22 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:58:19,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-02-10 02:58:19,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 240. [2022-02-10 02:58:19,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.00418410041841) internal successors, (718), 239 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 718 transitions. [2022-02-10 02:58:19,778 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 718 transitions. Word has length 17 [2022-02-10 02:58:19,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:19,778 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 718 transitions. [2022-02-10 02:58:19,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:19,779 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 718 transitions. [2022-02-10 02:58:19,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:19,779 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:19,779 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:19,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:19,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-02-10 02:58:19,980 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:19,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:19,980 INFO L85 PathProgramCache]: Analyzing trace with hash 19255576, now seen corresponding path program 56 times [2022-02-10 02:58:19,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:19,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458399834] [2022-02-10 02:58:19,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:19,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:20,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:20,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458399834] [2022-02-10 02:58:20,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458399834] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:20,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592662781] [2022-02-10 02:58:20,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 02:58:20,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:20,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:20,043 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:20,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-10 02:58:20,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 02:58:20,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:20,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:20,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:20,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:20,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592662781] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:20,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:20,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-02-10 02:58:20,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375983026] [2022-02-10 02:58:20,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:20,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-10 02:58:20,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:20,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-10 02:58:20,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-02-10 02:58:20,130 INFO L87 Difference]: Start difference. First operand 240 states and 718 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:20,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:20,237 INFO L93 Difference]: Finished difference Result 311 states and 825 transitions. [2022-02-10 02:58:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 02:58:20,237 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2022-02-10 02:58:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:20,238 INFO L225 Difference]: With dead ends: 311 [2022-02-10 02:58:20,238 INFO L226 Difference]: Without dead ends: 307 [2022-02-10 02:58:20,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2022-02-10 02:58:20,239 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 47 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:20,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 31 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:58:20,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-02-10 02:58:20,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 239. [2022-02-10 02:58:20,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 3.004201680672269) internal successors, (715), 238 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:20,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 715 transitions. [2022-02-10 02:58:20,244 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 715 transitions. Word has length 17 [2022-02-10 02:58:20,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:20,244 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 715 transitions. [2022-02-10 02:58:20,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:20,245 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 715 transitions. [2022-02-10 02:58:20,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:20,245 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:20,245 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:20,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:20,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:20,456 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:20,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:20,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1945289654, now seen corresponding path program 57 times [2022-02-10 02:58:20,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:20,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524050563] [2022-02-10 02:58:20,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:20,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:20,530 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:20,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524050563] [2022-02-10 02:58:20,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524050563] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:20,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758011770] [2022-02-10 02:58:20,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 02:58:20,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:20,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:20,532 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:20,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-10 02:58:20,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 02:58:20,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:20,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:20,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:20,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:20,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758011770] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:20,642 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:20,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-02-10 02:58:20,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394848101] [2022-02-10 02:58:20,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:20,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-10 02:58:20,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:20,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-10 02:58:20,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-02-10 02:58:20,642 INFO L87 Difference]: Start difference. First operand 239 states and 715 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:20,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:20,699 INFO L93 Difference]: Finished difference Result 289 states and 811 transitions. [2022-02-10 02:58:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 02:58:20,700 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2022-02-10 02:58:20,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:20,701 INFO L225 Difference]: With dead ends: 289 [2022-02-10 02:58:20,701 INFO L226 Difference]: Without dead ends: 284 [2022-02-10 02:58:20,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-02-10 02:58:20,715 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 64 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:20,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 13 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:58:20,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-10 02:58:20,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 239. [2022-02-10 02:58:20,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 3.0) internal successors, (714), 238 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:20,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 714 transitions. [2022-02-10 02:58:20,721 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 714 transitions. Word has length 17 [2022-02-10 02:58:20,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:20,721 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 714 transitions. [2022-02-10 02:58:20,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:20,721 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 714 transitions. [2022-02-10 02:58:20,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:20,727 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:20,727 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:20,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:20,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-02-10 02:58:20,944 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:20,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:20,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1481351028, now seen corresponding path program 58 times [2022-02-10 02:58:20,945 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:20,945 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145212441] [2022-02-10 02:58:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:20,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:21,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:21,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145212441] [2022-02-10 02:58:21,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145212441] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:21,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821170226] [2022-02-10 02:58:21,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 02:58:21,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:21,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:21,027 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:21,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-10 02:58:21,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 02:58:21,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:21,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:21,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:21,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:21,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821170226] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:21,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:21,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-02-10 02:58:21,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255371725] [2022-02-10 02:58:21,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:21,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 02:58:21,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:21,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 02:58:21,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-02-10 02:58:21,210 INFO L87 Difference]: Start difference. First operand 239 states and 714 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:21,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:21,318 INFO L93 Difference]: Finished difference Result 332 states and 850 transitions. [2022-02-10 02:58:21,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 02:58:21,319 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2022-02-10 02:58:21,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:21,320 INFO L225 Difference]: With dead ends: 332 [2022-02-10 02:58:21,321 INFO L226 Difference]: Without dead ends: 331 [2022-02-10 02:58:21,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-02-10 02:58:21,321 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:21,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 52 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:58:21,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-02-10 02:58:21,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 254. [2022-02-10 02:58:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.015810276679842) internal successors, (763), 253 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:21,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 763 transitions. [2022-02-10 02:58:21,327 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 763 transitions. Word has length 17 [2022-02-10 02:58:21,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:21,328 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 763 transitions. [2022-02-10 02:58:21,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:21,328 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 763 transitions. [2022-02-10 02:58:21,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:21,328 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:21,329 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:21,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:21,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-10 02:58:21,544 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:21,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:21,545 INFO L85 PathProgramCache]: Analyzing trace with hash 561650320, now seen corresponding path program 59 times [2022-02-10 02:58:21,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:21,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41564812] [2022-02-10 02:58:21,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:21,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:21,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:21,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41564812] [2022-02-10 02:58:21,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41564812] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:21,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275843923] [2022-02-10 02:58:21,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 02:58:21,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:21,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:21,592 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:21,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-10 02:58:21,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 02:58:21,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:21,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:21,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:21,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:21,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275843923] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:21,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:21,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-02-10 02:58:21,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261730527] [2022-02-10 02:58:21,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:21,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 02:58:21,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:21,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 02:58:21,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-02-10 02:58:21,678 INFO L87 Difference]: Start difference. First operand 254 states and 763 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:21,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:21,747 INFO L93 Difference]: Finished difference Result 388 states and 1010 transitions. [2022-02-10 02:58:21,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 02:58:21,747 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2022-02-10 02:58:21,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:21,749 INFO L225 Difference]: With dead ends: 388 [2022-02-10 02:58:21,749 INFO L226 Difference]: Without dead ends: 388 [2022-02-10 02:58:21,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-02-10 02:58:21,749 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 51 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:21,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 58 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:58:21,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-02-10 02:58:21,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 290. [2022-02-10 02:58:21,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.0899653979238755) internal successors, (893), 289 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:21,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 893 transitions. [2022-02-10 02:58:21,754 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 893 transitions. Word has length 17 [2022-02-10 02:58:21,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:21,755 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 893 transitions. [2022-02-10 02:58:21,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:21,755 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 893 transitions. [2022-02-10 02:58:21,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:21,755 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:21,755 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:21,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:21,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:21,972 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:21,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:21,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1160261262, now seen corresponding path program 60 times [2022-02-10 02:58:21,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:21,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055809874] [2022-02-10 02:58:21,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:21,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:22,015 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:22,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055809874] [2022-02-10 02:58:22,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055809874] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:22,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823572540] [2022-02-10 02:58:22,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 02:58:22,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:22,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:22,016 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:22,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-10 02:58:22,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 02:58:22,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:22,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:22,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:22,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:22,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823572540] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:22,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:22,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-02-10 02:58:22,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963927744] [2022-02-10 02:58:22,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:22,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 02:58:22,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:22,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 02:58:22,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-02-10 02:58:22,097 INFO L87 Difference]: Start difference. First operand 290 states and 893 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:22,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:22,194 INFO L93 Difference]: Finished difference Result 380 states and 999 transitions. [2022-02-10 02:58:22,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 02:58:22,194 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2022-02-10 02:58:22,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:22,196 INFO L225 Difference]: With dead ends: 380 [2022-02-10 02:58:22,196 INFO L226 Difference]: Without dead ends: 379 [2022-02-10 02:58:22,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2022-02-10 02:58:22,196 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 71 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:22,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 34 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:58:22,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-02-10 02:58:22,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 279. [2022-02-10 02:58:22,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.053956834532374) internal successors, (849), 278 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) [2022-02-10 02:58:22,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 849 transitions. [2022-02-10 02:58:22,201 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 849 transitions. Word has length 17 [2022-02-10 02:58:22,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:22,201 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 849 transitions. [2022-02-10 02:58:22,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:22,201 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 849 transitions. [2022-02-10 02:58:22,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:22,202 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:22,202 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:22,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:22,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-02-10 02:58:22,406 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:22,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:22,406 INFO L85 PathProgramCache]: Analyzing trace with hash -247696306, now seen corresponding path program 61 times [2022-02-10 02:58:22,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:22,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132701185] [2022-02-10 02:58:22,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:22,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:22,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:22,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132701185] [2022-02-10 02:58:22,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132701185] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:22,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383717715] [2022-02-10 02:58:22,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 02:58:22,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:22,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:22,479 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:22,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-10 02:58:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:22,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:22,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:22,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:22,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383717715] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:22,562 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:22,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-02-10 02:58:22,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465695374] [2022-02-10 02:58:22,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:22,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 02:58:22,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:22,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 02:58:22,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-02-10 02:58:22,563 INFO L87 Difference]: Start difference. First operand 279 states and 849 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:22,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:22,635 INFO L93 Difference]: Finished difference Result 364 states and 957 transitions. [2022-02-10 02:58:22,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-10 02:58:22,636 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2022-02-10 02:58:22,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:22,637 INFO L225 Difference]: With dead ends: 364 [2022-02-10 02:58:22,637 INFO L226 Difference]: Without dead ends: 364 [2022-02-10 02:58:22,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2022-02-10 02:58:22,638 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 32 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:22,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 73 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:58:22,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-02-10 02:58:22,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 260. [2022-02-10 02:58:22,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.027027027027027) internal successors, (784), 259 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 784 transitions. [2022-02-10 02:58:22,648 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 784 transitions. Word has length 17 [2022-02-10 02:58:22,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:22,648 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 784 transitions. [2022-02-10 02:58:22,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:22,648 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 784 transitions. [2022-02-10 02:58:22,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:22,648 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:22,648 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:22,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-02-10 02:58:22,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:22,849 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:22,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:22,849 INFO L85 PathProgramCache]: Analyzing trace with hash -415558764, now seen corresponding path program 62 times [2022-02-10 02:58:22,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:22,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181761112] [2022-02-10 02:58:22,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:22,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:22,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:22,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181761112] [2022-02-10 02:58:22,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181761112] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:22,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077584822] [2022-02-10 02:58:22,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 02:58:22,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:22,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:22,887 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:22,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-10 02:58:22,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 02:58:22,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:22,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:22,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:22,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:22,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077584822] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:22,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:22,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-02-10 02:58:22,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073338681] [2022-02-10 02:58:22,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:22,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 02:58:22,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:22,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 02:58:22,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-02-10 02:58:22,950 INFO L87 Difference]: Start difference. First operand 260 states and 784 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:23,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:23,016 INFO L93 Difference]: Finished difference Result 375 states and 992 transitions. [2022-02-10 02:58:23,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 02:58:23,016 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2022-02-10 02:58:23,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:23,018 INFO L225 Difference]: With dead ends: 375 [2022-02-10 02:58:23,018 INFO L226 Difference]: Without dead ends: 373 [2022-02-10 02:58:23,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-02-10 02:58:23,018 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 71 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:23,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 25 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:58:23,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-02-10 02:58:23,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 260. [2022-02-10 02:58:23,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.0193050193050195) internal successors, (782), 259 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 782 transitions. [2022-02-10 02:58:23,038 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 782 transitions. Word has length 17 [2022-02-10 02:58:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:23,038 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 782 transitions. [2022-02-10 02:58:23,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:23,039 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 782 transitions. [2022-02-10 02:58:23,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:23,039 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:23,039 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:23,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:23,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:23,253 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:23,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:23,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1195382194, now seen corresponding path program 63 times [2022-02-10 02:58:23,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:23,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682974729] [2022-02-10 02:58:23,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:23,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:23,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:23,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682974729] [2022-02-10 02:58:23,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682974729] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:23,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532857563] [2022-02-10 02:58:23,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 02:58:23,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:23,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:23,293 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:23,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-10 02:58:23,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 02:58:23,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:23,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:23,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 02:58:23,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 02:58:23,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532857563] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:23,370 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:23,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-02-10 02:58:23,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088609142] [2022-02-10 02:58:23,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:23,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-10 02:58:23,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:23,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-10 02:58:23,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-02-10 02:58:23,370 INFO L87 Difference]: Start difference. First operand 260 states and 782 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:23,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:23,457 INFO L93 Difference]: Finished difference Result 346 states and 925 transitions. [2022-02-10 02:58:23,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 02:58:23,458 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 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 17 [2022-02-10 02:58:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:23,459 INFO L225 Difference]: With dead ends: 346 [2022-02-10 02:58:23,459 INFO L226 Difference]: Without dead ends: 343 [2022-02-10 02:58:23,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-02-10 02:58:23,459 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 44 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:23,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 28 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:58:23,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-02-10 02:58:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 260. [2022-02-10 02:58:23,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.011583011583012) internal successors, (780), 259 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) [2022-02-10 02:58:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 780 transitions. [2022-02-10 02:58:23,463 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 780 transitions. Word has length 17 [2022-02-10 02:58:23,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:23,463 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 780 transitions. [2022-02-10 02:58:23,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:23,463 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 780 transitions. [2022-02-10 02:58:23,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:23,464 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:23,464 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:23,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:23,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:23,665 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:23,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:23,665 INFO L85 PathProgramCache]: Analyzing trace with hash -405055660, now seen corresponding path program 64 times [2022-02-10 02:58:23,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:23,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463671646] [2022-02-10 02:58:23,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:23,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:23,715 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:23,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463671646] [2022-02-10 02:58:23,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463671646] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:23,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66018062] [2022-02-10 02:58:23,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 02:58:23,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:23,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:23,719 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:23,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-10 02:58:23,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 02:58:23,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:23,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:23,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:23,792 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:23,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:23,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66018062] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:23,827 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:23,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-02-10 02:58:23,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178824468] [2022-02-10 02:58:23,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:23,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-10 02:58:23,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:23,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-10 02:58:23,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-02-10 02:58:23,828 INFO L87 Difference]: Start difference. First operand 260 states and 780 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:23,933 INFO L93 Difference]: Finished difference Result 342 states and 918 transitions. [2022-02-10 02:58:23,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-10 02:58:23,933 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2022-02-10 02:58:23,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:23,935 INFO L225 Difference]: With dead ends: 342 [2022-02-10 02:58:23,935 INFO L226 Difference]: Without dead ends: 338 [2022-02-10 02:58:23,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2022-02-10 02:58:23,935 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 40 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:23,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 37 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:58:23,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-10 02:58:23,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 270. [2022-02-10 02:58:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.026022304832714) internal successors, (814), 269 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) [2022-02-10 02:58:23,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 814 transitions. [2022-02-10 02:58:23,939 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 814 transitions. Word has length 17 [2022-02-10 02:58:23,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:23,939 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 814 transitions. [2022-02-10 02:58:23,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:23,939 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 814 transitions. [2022-02-10 02:58:23,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:23,940 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:23,940 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:23,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:24,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-02-10 02:58:24,141 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:24,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:24,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1520978418, now seen corresponding path program 65 times [2022-02-10 02:58:24,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:24,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051438806] [2022-02-10 02:58:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:24,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:24,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:24,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051438806] [2022-02-10 02:58:24,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051438806] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:24,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597093107] [2022-02-10 02:58:24,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 02:58:24,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:24,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:24,213 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:24,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-10 02:58:24,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 02:58:24,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:24,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:24,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:24,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:24,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597093107] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:24,291 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:24,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-02-10 02:58:24,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658819645] [2022-02-10 02:58:24,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:24,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-10 02:58:24,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:24,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-10 02:58:24,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-02-10 02:58:24,292 INFO L87 Difference]: Start difference. First operand 270 states and 814 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:24,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:24,342 INFO L93 Difference]: Finished difference Result 323 states and 916 transitions. [2022-02-10 02:58:24,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-10 02:58:24,342 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2022-02-10 02:58:24,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:24,343 INFO L225 Difference]: With dead ends: 323 [2022-02-10 02:58:24,343 INFO L226 Difference]: Without dead ends: 318 [2022-02-10 02:58:24,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-02-10 02:58:24,344 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:24,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 16 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:58:24,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-02-10 02:58:24,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 270. [2022-02-10 02:58:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.0223048327137545) internal successors, (813), 269 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:24,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 813 transitions. [2022-02-10 02:58:24,348 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 813 transitions. Word has length 17 [2022-02-10 02:58:24,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:24,348 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 813 transitions. [2022-02-10 02:58:24,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:24,348 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 813 transitions. [2022-02-10 02:58:24,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:24,348 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:24,349 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:24,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:24,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:24,553 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:24,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:24,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1098492692, now seen corresponding path program 66 times [2022-02-10 02:58:24,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:24,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060580662] [2022-02-10 02:58:24,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:24,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:24,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:24,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060580662] [2022-02-10 02:58:24,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060580662] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:24,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860631969] [2022-02-10 02:58:24,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 02:58:24,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:24,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:24,607 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:24,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-10 02:58:24,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 02:58:24,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:24,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:24,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:24,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:24,694 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:24,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860631969] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:24,694 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:24,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-02-10 02:58:24,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908227192] [2022-02-10 02:58:24,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:24,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-10 02:58:24,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:24,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-10 02:58:24,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-02-10 02:58:24,695 INFO L87 Difference]: Start difference. First operand 270 states and 813 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:24,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:24,746 INFO L93 Difference]: Finished difference Result 322 states and 914 transitions. [2022-02-10 02:58:24,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-10 02:58:24,746 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2022-02-10 02:58:24,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:24,748 INFO L225 Difference]: With dead ends: 322 [2022-02-10 02:58:24,748 INFO L226 Difference]: Without dead ends: 316 [2022-02-10 02:58:24,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-02-10 02:58:24,748 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 36 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:24,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 16 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 02:58:24,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-10 02:58:24,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 269. [2022-02-10 02:58:24,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0261194029850746) internal successors, (811), 268 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:24,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 811 transitions. [2022-02-10 02:58:24,753 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 811 transitions. Word has length 17 [2022-02-10 02:58:24,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:24,753 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 811 transitions. [2022-02-10 02:58:24,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:24,753 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 811 transitions. [2022-02-10 02:58:24,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-10 02:58:24,754 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:24,754 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:24,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-02-10 02:58:24,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:24,970 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:24,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:24,971 INFO L85 PathProgramCache]: Analyzing trace with hash -25155694, now seen corresponding path program 67 times [2022-02-10 02:58:24,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:24,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639310644] [2022-02-10 02:58:24,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:24,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:25,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:25,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639310644] [2022-02-10 02:58:25,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639310644] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:25,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747563012] [2022-02-10 02:58:25,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 02:58:25,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:25,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:25,034 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:25,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-10 02:58:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:25,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-10 02:58:25,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:25,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:25,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747563012] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 02:58:25,150 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 02:58:25,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-02-10 02:58:25,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508634386] [2022-02-10 02:58:25,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 02:58:25,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-10 02:58:25,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 02:58:25,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-10 02:58:25,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-10 02:58:25,152 INFO L87 Difference]: Start difference. First operand 269 states and 811 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:25,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 02:58:25,317 INFO L93 Difference]: Finished difference Result 352 states and 984 transitions. [2022-02-10 02:58:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-10 02:58:25,317 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) 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 17 [2022-02-10 02:58:25,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 02:58:25,319 INFO L225 Difference]: With dead ends: 352 [2022-02-10 02:58:25,319 INFO L226 Difference]: Without dead ends: 352 [2022-02-10 02:58:25,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2022-02-10 02:58:25,319 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 02:58:25,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 16 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 02:58:25,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-02-10 02:58:25,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 278. [2022-02-10 02:58:25,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.0180505415162453) internal successors, (836), 277 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:25,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 836 transitions. [2022-02-10 02:58:25,323 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 836 transitions. Word has length 17 [2022-02-10 02:58:25,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 02:58:25,323 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 836 transitions. [2022-02-10 02:58:25,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 02:58:25,324 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 836 transitions. [2022-02-10 02:58:25,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 02:58:25,324 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 02:58:25,324 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 02:58:25,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-10 02:58:25,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-02-10 02:58:25,525 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 02:58:25,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 02:58:25,525 INFO L85 PathProgramCache]: Analyzing trace with hash 782725393, now seen corresponding path program 68 times [2022-02-10 02:58:25,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 02:58:25,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202849892] [2022-02-10 02:58:25,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 02:58:25,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 02:58:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 02:58:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:25,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 02:58:25,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202849892] [2022-02-10 02:58:25,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202849892] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 02:58:25,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467632486] [2022-02-10 02:58:25,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 02:58:25,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 02:58:25,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 02:58:25,654 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 02:58:25,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-10 02:58:25,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 02:58:25,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 02:58:25,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-10 02:58:25,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 02:58:26,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:58:26,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 282 [2022-02-10 02:58:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 02:58:28,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 02:58:29,489 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 02:58:29,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 24 new quantified variables, introduced 78 case distinctions, treesize of input 63 treesize of output 682 [2022-02-10 03:04:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:05,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467632486] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:04:05,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:04:05,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-02-10 03:04:05,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797527759] [2022-02-10 03:04:05,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:04:05,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-10 03:04:05,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:04:05,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-10 03:04:05,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-02-10 03:04:05,427 INFO L87 Difference]: Start difference. First operand 278 states and 836 transitions. Second operand has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:05,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:04:05,827 INFO L93 Difference]: Finished difference Result 325 states and 931 transitions. [2022-02-10 03:04:05,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:04:05,828 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-10 03:04:05,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:04:05,829 INFO L225 Difference]: With dead ends: 325 [2022-02-10 03:04:05,829 INFO L226 Difference]: Without dead ends: 309 [2022-02-10 03:04:05,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=1414, Unknown=0, NotChecked=0, Total=1560 [2022-02-10 03:04:05,830 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 26 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:04:05,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 41 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-10 03:04:05,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-02-10 03:04:05,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 293. [2022-02-10 03:04:05,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0239726027397262) internal successors, (883), 292 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:05,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 883 transitions. [2022-02-10 03:04:05,835 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 883 transitions. Word has length 18 [2022-02-10 03:04:05,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:04:05,836 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 883 transitions. [2022-02-10 03:04:05,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:04:05,836 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 883 transitions. [2022-02-10 03:04:05,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:04:05,836 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:04:05,836 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:04:05,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-02-10 03:04:06,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-02-10 03:04:06,046 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:04:06,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:04:06,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1289432683, now seen corresponding path program 69 times [2022-02-10 03:04:06,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:04:06,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76214254] [2022-02-10 03:04:06,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:04:06,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:04:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:04:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:06,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:04:06,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76214254] [2022-02-10 03:04:06,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76214254] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:04:06,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901083918] [2022-02-10 03:04:06,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:04:06,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:04:06,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:04:06,177 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-10 03:04:06,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-10 03:04:06,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:04:06,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:04:06,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-10 03:04:06,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:04:06,567 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:06,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 282 [2022-02-10 03:04:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:04:13,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:04:14,119 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:04:14,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 24 new quantified variables, introduced 78 case distinctions, treesize of input 63 treesize of output 682 Received shutdown request... [2022-02-10 03:05:52,759 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-02-10 03:05:52,760 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-10 03:05:52,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-02-10 03:05:52,785 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-10 03:05:52,785 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-10 03:05:52,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:05:52,963 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 19 with TraceHistMax 6,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 7ms.. [2022-02-10 03:05:52,964 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-10 03:05:52,965 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-10 03:05:52,966 INFO L732 BasicCegarLoop]: Path program histogram: [69, 9, 2, 1] [2022-02-10 03:05:52,967 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-10 03:05:52,967 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-10 03:05:52,969 INFO L202 PluginConnector]: Adding new model unroll-cond-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.02 03:05:52 BasicIcfg [2022-02-10 03:05:52,969 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-10 03:05:52,969 INFO L158 Benchmark]: Toolchain (without parser) took 880141.88ms. Allocated memory was 202.4MB in the beginning and 876.6MB in the end (delta: 674.2MB). Free memory was 167.5MB in the beginning and 713.1MB in the end (delta: -545.6MB). Peak memory consumption was 534.9MB. Max. memory is 8.0GB. [2022-02-10 03:05:52,969 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 202.4MB. Free memory was 168.8MB in the beginning and 168.6MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-10 03:05:52,969 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.85ms. Allocated memory is still 202.4MB. Free memory was 167.5MB in the beginning and 165.9MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-02-10 03:05:52,969 INFO L158 Benchmark]: Boogie Preprocessor took 17.80ms. Allocated memory is still 202.4MB. Free memory was 165.9MB in the beginning and 165.0MB in the end (delta: 881.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-10 03:05:52,969 INFO L158 Benchmark]: RCFGBuilder took 260.75ms. Allocated memory is still 202.4MB. Free memory was 165.0MB in the beginning and 154.1MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-10 03:05:52,969 INFO L158 Benchmark]: TraceAbstraction took 879839.86ms. Allocated memory was 202.4MB in the beginning and 876.6MB in the end (delta: 674.2MB). Free memory was 153.6MB in the beginning and 713.1MB in the end (delta: -559.5MB). Peak memory consumption was 520.2MB. Max. memory is 8.0GB. [2022-02-10 03:05:52,969 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 0.10ms. Allocated memory is still 202.4MB. Free memory was 168.8MB in the beginning and 168.6MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.85ms. Allocated memory is still 202.4MB. Free memory was 167.5MB in the beginning and 165.9MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.80ms. Allocated memory is still 202.4MB. Free memory was 165.9MB in the beginning and 165.0MB in the end (delta: 881.4kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 260.75ms. Allocated memory is still 202.4MB. Free memory was 165.0MB in the beginning and 154.1MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 879839.86ms. Allocated memory was 202.4MB in the beginning and 876.6MB in the end (delta: 674.2MB). Free memory was 153.6MB in the beginning and 713.1MB in the end (delta: -559.5MB). Peak memory consumption was 520.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 0 - 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: 61]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 19 with TraceHistMax 6,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 7ms.. - TimeoutResultAtElement [Line: 56]: 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 6,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 7ms.. - TimeoutResultAtElement [Line: 56]: 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 6,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 7ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 879.7s, OverallIterations: 81, TraceHistogramMax: 6, PathProgramHistogramMax: 69, EmptinessCheckTime: 0.1s, AutomataDifference: 22.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3356 SdHoareTripleChecker+Valid, 9.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3356 mSDsluCounter, 3470 SdHoareTripleChecker+Invalid, 7.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6271 mSDsCounter, 2199 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18921 IncrementalHoareTripleChecker+Invalid, 21120 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2199 mSolverCounterUnsat, 564 mSDtfsCounter, 18921 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3422 GetRequests, 1698 SyntacticMatches, 110 SemanticMatches, 1614 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10867 ImplicationChecksByTransitivity, 21.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=293occurred in iteration=80, InterpolantAutomatonStates: 1348, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 80 MinimizatonAttempts, 3703 StatesRemovedByMinimization, 79 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 730.8s InterpolantComputationTime, 2355 NumberOfCodeBlocks, 2355 NumberOfCodeBlocksAsserted, 261 NumberOfCheckSat, 3278 ConstructedInterpolants, 0 QuantifiedInterpolants, 27687 SizeOfPredicates, 238 NumberOfNonLiveVariables, 4331 ConjunctsInSsa, 1368 ConjunctsInUnsatCore, 232 InterpolantComputations, 4 PerfectInterpolantSequences, 925/2952 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