/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/popl20/prod-cons.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-16 14:08:36,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-16 14:08:36,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-16 14:08:36,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-16 14:08:36,871 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 [2022-02-16 14:08:36,887 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-16 14:08:36,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-16 14:08:36,887 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-16 14:08:36,887 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-16 14:08:36,888 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-16 14:08:36,888 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-16 14:08:36,889 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-16 14:08:36,889 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-16 14:08:36,889 INFO L138 SettingsManager]: * Use SBE=true [2022-02-16 14:08:36,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-16 14:08:36,889 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-16 14:08:36,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-16 14:08:36,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-16 14:08:36,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-16 14:08:36,890 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-16 14:08:36,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-16 14:08:36,891 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-16 14:08:36,891 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-16 14:08:36,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-16 14:08:36,891 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-16 14:08:36,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-16 14:08:36,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-16 14:08:36,892 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-16 14:08:36,892 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-16 14:08:36,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-16 14:08:36,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 14:08:36,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-16 14:08:36,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-16 14:08:36,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-16 14:08:36,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-16 14:08:36,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-16 14:08:36,893 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-16 14:08:36,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-16 14:08:36,893 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-16 14:08:36,894 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-16 14:08:37,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-16 14:08:37,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-16 14:08:37,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-16 14:08:37,128 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-16 14:08:37,131 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-16 14:08:37,132 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl [2022-02-16 14:08:37,132 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl' [2022-02-16 14:08:37,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-16 14:08:37,156 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-16 14:08:37,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-16 14:08:37,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-16 14:08:37,162 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-16 14:08:37,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:08:37" (1/1) ... [2022-02-16 14:08:37,179 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:08:37" (1/1) ... [2022-02-16 14:08:37,184 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-16 14:08:37,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-16 14:08:37,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-16 14:08:37,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-16 14:08:37,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-16 14:08:37,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:08:37" (1/1) ... [2022-02-16 14:08:37,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:08:37" (1/1) ... [2022-02-16 14:08:37,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:08:37" (1/1) ... [2022-02-16 14:08:37,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:08:37" (1/1) ... [2022-02-16 14:08:37,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:08:37" (1/1) ... [2022-02-16 14:08:37,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:08:37" (1/1) ... [2022-02-16 14:08:37,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:08:37" (1/1) ... [2022-02-16 14:08:37,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-16 14:08:37,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-16 14:08:37,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-16 14:08:37,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-16 14:08:37,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:08:37" (1/1) ... [2022-02-16 14:08:37,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 14:08:37,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:37,236 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) [2022-02-16 14:08:37,245 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 [2022-02-16 14:08:37,274 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-16 14:08:37,274 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-16 14:08:37,274 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-16 14:08:37,274 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-16 14:08:37,274 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-16 14:08:37,274 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-16 14:08:37,275 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-16 14:08:37,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-16 14:08:37,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-16 14:08:37,275 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-16 14:08:37,276 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-16 14:08:37,276 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-16 14:08:37,276 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-16 14:08:37,313 INFO L234 CfgBuilder]: Building ICFG [2022-02-16 14:08:37,315 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-16 14:08:37,383 INFO L275 CfgBuilder]: Performing block encoding [2022-02-16 14:08:37,395 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-16 14:08:37,396 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-16 14:08:37,397 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:08:37 BoogieIcfgContainer [2022-02-16 14:08:37,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-16 14:08:37,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-16 14:08:37,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-16 14:08:37,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-16 14:08:37,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 02:08:37" (1/2) ... [2022-02-16 14:08:37,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7622a26f and model type prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:08:37, skipping insertion in model container [2022-02-16 14:08:37,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:08:37" (2/2) ... [2022-02-16 14:08:37,409 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons.wvr.bpl [2022-02-16 14:08:37,418 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-16 14:08:37,418 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-16 14:08:37,418 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-16 14:08:37,418 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-16 14:08:37,477 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-16 14:08:37,526 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-16 14:08:37,534 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 [2022-02-16 14:08:37,535 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-16 14:08:37,547 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 30 transitions, 84 flow [2022-02-16 14:08:37,598 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 132 states, 131 states have (on average 2.5877862595419847) internal successors, (339), 131 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:39,980 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 112938 transitions and produced 49040 states. [2022-02-16 14:08:40,283 INFO L276 IsEmpty]: Start isEmpty. Operand has 49040 states, 28781 states have (on average 1.9412112157326014) internal successors, (55870), 49039 states have internal predecessors, (55870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:40,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 14:08:40,396 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:40,397 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:40,397 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:40,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:40,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1798569311, now seen corresponding path program 1 times [2022-02-16 14:08:40,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:40,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008815189] [2022-02-16 14:08:40,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:40,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:40,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:40,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008815189] [2022-02-16 14:08:40,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008815189] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:08:40,600 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 14:08:40,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-16 14:08:40,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698862150] [2022-02-16 14:08:40,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:08:40,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-16 14:08:40,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:40,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-16 14:08:40,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 14:08:40,818 INFO L87 Difference]: Start difference. First operand has 49040 states, 28781 states have (on average 1.9412112157326014) internal successors, (55870), 49039 states have internal predecessors, (55870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) [2022-02-16 14:08:41,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:41,811 INFO L93 Difference]: Finished difference Result 29069 states and 34926 transitions. [2022-02-16 14:08:41,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-16 14:08:41,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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 19 [2022-02-16 14:08:41,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:41,842 INFO L225 Difference]: With dead ends: 29069 [2022-02-16 14:08:41,842 INFO L226 Difference]: Without dead ends: 3255 [2022-02-16 14:08:41,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 14:08:41,846 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:41,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-16 14:08:41,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2022-02-16 14:08:41,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 44. [2022-02-16 14:08:41,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:41,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2022-02-16 14:08:41,918 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 19 [2022-02-16 14:08:41,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:41,919 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2022-02-16 14:08:41,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) [2022-02-16 14:08:41,919 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2022-02-16 14:08:41,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-16 14:08:41,921 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:41,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:41,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-16 14:08:41,922 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:41,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:41,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1404113307, now seen corresponding path program 2 times [2022-02-16 14:08:41,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:41,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433584150] [2022-02-16 14:08:41,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:41,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:41,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:41,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433584150] [2022-02-16 14:08:41,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433584150] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:08:41,968 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 14:08:41,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-16 14:08:41,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550524642] [2022-02-16 14:08:41,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:08:41,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 14:08:41,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:41,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 14:08:41,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-16 14:08:41,970 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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) [2022-02-16 14:08:42,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:42,047 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2022-02-16 14:08:42,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-16 14:08:42,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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 19 [2022-02-16 14:08:42,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:42,049 INFO L225 Difference]: With dead ends: 65 [2022-02-16 14:08:42,049 INFO L226 Difference]: Without dead ends: 57 [2022-02-16 14:08:42,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-16 14:08:42,050 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:42,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 25 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:08:42,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-16 14:08:42,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-02-16 14:08:42,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:42,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2022-02-16 14:08:42,055 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 19 [2022-02-16 14:08:42,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:42,056 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2022-02-16 14:08:42,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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) [2022-02-16 14:08:42,056 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2022-02-16 14:08:42,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-16 14:08:42,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:42,056 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:42,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-16 14:08:42,057 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:42,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:42,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1364646154, now seen corresponding path program 1 times [2022-02-16 14:08:42,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:42,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761877588] [2022-02-16 14:08:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:42,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:42,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:42,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761877588] [2022-02-16 14:08:42,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761877588] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 14:08:42,093 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 14:08:42,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-16 14:08:42,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035298097] [2022-02-16 14:08:42,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 14:08:42,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-16 14:08:42,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:42,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-16 14:08:42,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 14:08:42,094 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:42,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:42,106 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2022-02-16 14:08:42,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-16 14:08:42,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-02-16 14:08:42,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:42,107 INFO L225 Difference]: With dead ends: 66 [2022-02-16 14:08:42,107 INFO L226 Difference]: Without dead ends: 61 [2022-02-16 14:08:42,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-16 14:08:42,108 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:42,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:08:42,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-02-16 14:08:42,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-02-16 14:08:42,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.3833333333333333) internal successors, (83), 60 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:42,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 83 transitions. [2022-02-16 14:08:42,112 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 83 transitions. Word has length 22 [2022-02-16 14:08:42,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:42,113 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 83 transitions. [2022-02-16 14:08:42,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:42,113 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 83 transitions. [2022-02-16 14:08:42,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-16 14:08:42,113 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:42,114 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:42,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-16 14:08:42,114 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:42,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:42,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1220695708, now seen corresponding path program 1 times [2022-02-16 14:08:42,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:42,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901266740] [2022-02-16 14:08:42,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:42,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:42,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:42,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901266740] [2022-02-16 14:08:42,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901266740] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:42,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253765677] [2022-02-16 14:08:42,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:42,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:42,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:42,277 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) [2022-02-16 14:08:42,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-16 14:08:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:42,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-16 14:08:42,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:42,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-16 14:08:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:42,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:42,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:08:42,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-02-16 14:08:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:42,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253765677] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:42,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:42,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-16 14:08:42,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941850269] [2022-02-16 14:08:42,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:42,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-16 14:08:42,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:42,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-16 14:08:42,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-02-16 14:08:42,959 INFO L87 Difference]: Start difference. First operand 61 states and 83 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:43,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:43,434 INFO L93 Difference]: Finished difference Result 98 states and 136 transitions. [2022-02-16 14:08:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-16 14:08:43,434 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-16 14:08:43,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:43,436 INFO L225 Difference]: With dead ends: 98 [2022-02-16 14:08:43,436 INFO L226 Difference]: Without dead ends: 87 [2022-02-16 14:08:43,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 14:08:43,440 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 162 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:43,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 80 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-16 14:08:43,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-16 14:08:43,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2022-02-16 14:08:43,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.3866666666666667) internal successors, (104), 75 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 104 transitions. [2022-02-16 14:08:43,453 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 104 transitions. Word has length 25 [2022-02-16 14:08:43,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:43,453 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 104 transitions. [2022-02-16 14:08:43,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:43,454 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 104 transitions. [2022-02-16 14:08:43,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-16 14:08:43,454 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:43,455 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:43,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:43,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:43,672 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:43,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:43,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1935029845, now seen corresponding path program 2 times [2022-02-16 14:08:43,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:43,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803931828] [2022-02-16 14:08:43,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:43,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:43,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:43,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803931828] [2022-02-16 14:08:43,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803931828] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:43,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539893837] [2022-02-16 14:08:43,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:08:43,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:43,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:43,728 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) [2022-02-16 14:08:43,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-16 14:08:43,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:08:43,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:43,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-16 14:08:43,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:43,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:43,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539893837] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:43,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:43,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-16 14:08:43,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397637971] [2022-02-16 14:08:43,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:43,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 14:08:43,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:43,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 14:08:43,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-16 14:08:43,850 INFO L87 Difference]: Start difference. First operand 76 states and 104 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:43,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:43,868 INFO L93 Difference]: Finished difference Result 179 states and 239 transitions. [2022-02-16 14:08:43,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 14:08:43,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-02-16 14:08:43,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:43,875 INFO L225 Difference]: With dead ends: 179 [2022-02-16 14:08:43,875 INFO L226 Difference]: Without dead ends: 165 [2022-02-16 14:08:43,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-16 14:08:43,876 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:43,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 76 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:08:43,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-02-16 14:08:43,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 131. [2022-02-16 14:08:43,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.4230769230769231) internal successors, (185), 130 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:43,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 185 transitions. [2022-02-16 14:08:43,891 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 185 transitions. Word has length 28 [2022-02-16 14:08:43,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:43,891 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 185 transitions. [2022-02-16 14:08:43,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:43,891 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 185 transitions. [2022-02-16 14:08:43,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-16 14:08:43,892 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:43,892 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:43,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:44,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:44,093 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:44,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:44,093 INFO L85 PathProgramCache]: Analyzing trace with hash 388329093, now seen corresponding path program 3 times [2022-02-16 14:08:44,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:44,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925234210] [2022-02-16 14:08:44,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:44,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:44,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:44,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925234210] [2022-02-16 14:08:44,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925234210] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:44,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802613870] [2022-02-16 14:08:44,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:08:44,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:44,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:44,297 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) [2022-02-16 14:08:44,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-16 14:08:44,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-16 14:08:44,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:44,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 14:08:44,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:44,676 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-16 14:08:44,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-16 14:08:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:44,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:45,008 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:08:45,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 51 [2022-02-16 14:08:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:45,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802613870] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:45,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:45,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-16 14:08:45,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572563535] [2022-02-16 14:08:45,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:45,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-16 14:08:45,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:45,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-16 14:08:45,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-02-16 14:08:45,255 INFO L87 Difference]: Start difference. First operand 131 states and 185 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:50,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:50,548 INFO L93 Difference]: Finished difference Result 520 states and 767 transitions. [2022-02-16 14:08:50,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-02-16 14:08:50,549 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-02-16 14:08:50,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:50,551 INFO L225 Difference]: With dead ends: 520 [2022-02-16 14:08:50,551 INFO L226 Difference]: Without dead ends: 414 [2022-02-16 14:08:50,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8700 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4169, Invalid=20323, Unknown=0, NotChecked=0, Total=24492 [2022-02-16 14:08:50,557 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 437 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:50,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 192 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-16 14:08:50,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-02-16 14:08:50,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 156. [2022-02-16 14:08:50,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.4451612903225806) internal successors, (224), 155 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:50,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 224 transitions. [2022-02-16 14:08:50,563 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 224 transitions. Word has length 31 [2022-02-16 14:08:50,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:50,564 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 224 transitions. [2022-02-16 14:08:50,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:50,564 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 224 transitions. [2022-02-16 14:08:50,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-16 14:08:50,564 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:50,565 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:50,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-16 14:08:50,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:50,784 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:50,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:50,785 INFO L85 PathProgramCache]: Analyzing trace with hash -540625471, now seen corresponding path program 4 times [2022-02-16 14:08:50,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:50,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285131557] [2022-02-16 14:08:50,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:50,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:08:51,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:51,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285131557] [2022-02-16 14:08:51,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285131557] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:51,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248774654] [2022-02-16 14:08:51,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:08:51,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:51,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:51,005 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) [2022-02-16 14:08:51,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-16 14:08:51,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:08:51,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:51,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-16 14:08:51,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:51,341 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-16 14:08:51,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-02-16 14:08:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:51,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:51,632 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-16 14:08:51,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 51 [2022-02-16 14:08:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:51,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248774654] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:51,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:51,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 31 [2022-02-16 14:08:51,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052591449] [2022-02-16 14:08:51,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:51,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-16 14:08:51,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:51,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-16 14:08:51,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2022-02-16 14:08:51,859 INFO L87 Difference]: Start difference. First operand 156 states and 224 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:56,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:56,389 INFO L93 Difference]: Finished difference Result 756 states and 1105 transitions. [2022-02-16 14:08:56,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-02-16 14:08:56,391 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-02-16 14:08:56,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:56,394 INFO L225 Difference]: With dead ends: 756 [2022-02-16 14:08:56,394 INFO L226 Difference]: Without dead ends: 662 [2022-02-16 14:08:56,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8109 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3883, Invalid=17579, Unknown=0, NotChecked=0, Total=21462 [2022-02-16 14:08:56,402 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 372 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:56,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 284 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-16 14:08:56,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-02-16 14:08:56,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 213. [2022-02-16 14:08:56,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.5) internal successors, (318), 212 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:56,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 318 transitions. [2022-02-16 14:08:56,411 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 318 transitions. Word has length 31 [2022-02-16 14:08:56,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:56,412 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 318 transitions. [2022-02-16 14:08:56,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:56,412 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 318 transitions. [2022-02-16 14:08:56,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-16 14:08:56,413 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:56,413 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:56,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:56,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:56,627 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:56,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:56,628 INFO L85 PathProgramCache]: Analyzing trace with hash 687793386, now seen corresponding path program 5 times [2022-02-16 14:08:56,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:56,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747394356] [2022-02-16 14:08:56,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:56,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:56,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:56,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747394356] [2022-02-16 14:08:56,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747394356] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:56,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199516840] [2022-02-16 14:08:56,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:08:56,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:56,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:56,671 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) [2022-02-16 14:08:56,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-16 14:08:56,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:08:56,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:56,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-16 14:08:56,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:56,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:56,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199516840] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:56,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:56,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-02-16 14:08:56,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871538374] [2022-02-16 14:08:56,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:56,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-16 14:08:56,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:56,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-16 14:08:56,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-16 14:08:56,851 INFO L87 Difference]: Start difference. First operand 213 states and 318 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:56,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:08:56,876 INFO L93 Difference]: Finished difference Result 408 states and 589 transitions. [2022-02-16 14:08:56,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 14:08:56,877 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-02-16 14:08:56,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:08:56,879 INFO L225 Difference]: With dead ends: 408 [2022-02-16 14:08:56,879 INFO L226 Difference]: Without dead ends: 390 [2022-02-16 14:08:56,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-16 14:08:56,881 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:08:56,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 114 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:08:56,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-02-16 14:08:56,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 287. [2022-02-16 14:08:56,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.5174825174825175) internal successors, (434), 286 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:56,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 434 transitions. [2022-02-16 14:08:56,892 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 434 transitions. Word has length 34 [2022-02-16 14:08:56,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:08:56,894 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 434 transitions. [2022-02-16 14:08:56,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:08:56,894 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 434 transitions. [2022-02-16 14:08:56,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-16 14:08:56,897 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:08:56,897 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:08:56,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-16 14:08:57,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:57,124 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:08:57,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:08:57,124 INFO L85 PathProgramCache]: Analyzing trace with hash 893255236, now seen corresponding path program 6 times [2022-02-16 14:08:57,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:08:57,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10577963] [2022-02-16 14:08:57,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:08:57,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:08:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:08:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:57,390 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:08:57,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10577963] [2022-02-16 14:08:57,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10577963] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:08:57,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315802107] [2022-02-16 14:08:57,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:08:57,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:08:57,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:08:57,395 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) [2022-02-16 14:08:57,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-16 14:08:57,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-16 14:08:57,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:08:57,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:08:57,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:08:57,942 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-16 14:08:57,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-02-16 14:08:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:58,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:08:58,471 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:08:58,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-02-16 14:08:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:08:59,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315802107] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:08:59,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:08:59,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-02-16 14:08:59,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028433013] [2022-02-16 14:08:59,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:08:59,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-16 14:08:59,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:08:59,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-16 14:08:59,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 14:08:59,117 INFO L87 Difference]: Start difference. First operand 287 states and 434 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 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) [2022-02-16 14:09:10,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:10,185 INFO L93 Difference]: Finished difference Result 1431 states and 2098 transitions. [2022-02-16 14:09:10,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2022-02-16 14:09:10,186 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 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) Word has length 37 [2022-02-16 14:09:10,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:10,190 INFO L225 Difference]: With dead ends: 1431 [2022-02-16 14:09:10,190 INFO L226 Difference]: Without dead ends: 1311 [2022-02-16 14:09:10,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28256 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=10899, Invalid=60657, Unknown=0, NotChecked=0, Total=71556 [2022-02-16 14:09:10,202 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 755 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 3023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:10,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 479 Invalid, 3023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-16 14:09:10,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2022-02-16 14:09:10,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 365. [2022-02-16 14:09:10,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.5384615384615385) internal successors, (560), 364 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 560 transitions. [2022-02-16 14:09:10,216 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 560 transitions. Word has length 37 [2022-02-16 14:09:10,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:10,218 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 560 transitions. [2022-02-16 14:09:10,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 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) [2022-02-16 14:09:10,218 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 560 transitions. [2022-02-16 14:09:10,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-16 14:09:10,220 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:10,220 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:10,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-16 14:09:10,442 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 [2022-02-16 14:09:10,443 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:09:10,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:10,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1712443004, now seen corresponding path program 7 times [2022-02-16 14:09:10,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:10,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410800137] [2022-02-16 14:09:10,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:10,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:10,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:10,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410800137] [2022-02-16 14:09:10,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410800137] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:10,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430268938] [2022-02-16 14:09:10,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:09:10,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:10,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:10,735 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) [2022-02-16 14:09:10,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-16 14:09:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:10,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:09:10,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:11,233 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-16 14:09:11,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-02-16 14:09:11,306 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:11,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:11,705 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:09:11,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-02-16 14:09:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:12,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430268938] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:12,134 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:12,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-02-16 14:09:12,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902630415] [2022-02-16 14:09:12,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:12,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-16 14:09:12,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:12,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-16 14:09:12,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1805, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 14:09:12,136 INFO L87 Difference]: Start difference. First operand 365 states and 560 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:26,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:26,383 INFO L93 Difference]: Finished difference Result 1462 states and 2118 transitions. [2022-02-16 14:09:26,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-02-16 14:09:26,383 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-02-16 14:09:26,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:26,388 INFO L225 Difference]: With dead ends: 1462 [2022-02-16 14:09:26,388 INFO L226 Difference]: Without dead ends: 1435 [2022-02-16 14:09:26,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41368 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=14971, Invalid=86471, Unknown=0, NotChecked=0, Total=101442 [2022-02-16 14:09:26,399 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 411 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 3001 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 3377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 3001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:26,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 603 Invalid, 3377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 3001 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-16 14:09:26,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2022-02-16 14:09:26,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 390. [2022-02-16 14:09:26,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.5424164524421593) internal successors, (600), 389 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 600 transitions. [2022-02-16 14:09:26,412 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 600 transitions. Word has length 37 [2022-02-16 14:09:26,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:26,412 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 600 transitions. [2022-02-16 14:09:26,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:26,413 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 600 transitions. [2022-02-16 14:09:26,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-16 14:09:26,413 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:26,414 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:26,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-16 14:09:26,627 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 [2022-02-16 14:09:26,627 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:09:26,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:26,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1117872760, now seen corresponding path program 8 times [2022-02-16 14:09:26,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:26,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520044743] [2022-02-16 14:09:26,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:26,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:09:26,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:26,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520044743] [2022-02-16 14:09:26,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520044743] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:26,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799473601] [2022-02-16 14:09:26,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:09:26,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:26,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:26,860 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) [2022-02-16 14:09:26,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-16 14:09:26,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:09:26,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:09:26,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:09:26,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:27,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:09:27,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:09:27,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:09:27,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:09:27,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:09:27,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-02-16 14:09:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:27,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:28,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:09:28,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:09:28,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:09:28,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:09:28,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:09:28,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:09:28,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:09:28,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:09:28,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 36 treesize of output 94 [2022-02-16 14:09:28,683 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:28,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799473601] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:28,683 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:28,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-02-16 14:09:28,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228213121] [2022-02-16 14:09:28,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:28,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-16 14:09:28,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:28,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-16 14:09:28,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1686, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 14:09:28,687 INFO L87 Difference]: Start difference. First operand 390 states and 600 transitions. Second operand has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 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) [2022-02-16 14:09:33,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:33,010 INFO L93 Difference]: Finished difference Result 1078 states and 1741 transitions. [2022-02-16 14:09:33,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-02-16 14:09:33,010 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 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) Word has length 37 [2022-02-16 14:09:33,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:33,014 INFO L225 Difference]: With dead ends: 1078 [2022-02-16 14:09:33,014 INFO L226 Difference]: Without dead ends: 1058 [2022-02-16 14:09:33,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8029 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3629, Invalid=18423, Unknown=0, NotChecked=0, Total=22052 [2022-02-16 14:09:33,018 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 226 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1083 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:33,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 267 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 516 Invalid, 0 Unknown, 1083 Unchecked, 0.3s Time] [2022-02-16 14:09:33,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-02-16 14:09:33,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 584. [2022-02-16 14:09:33,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 1.6260720411663807) internal successors, (948), 583 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:33,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 948 transitions. [2022-02-16 14:09:33,033 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 948 transitions. Word has length 37 [2022-02-16 14:09:33,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:33,034 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 948 transitions. [2022-02-16 14:09:33,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 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) [2022-02-16 14:09:33,034 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 948 transitions. [2022-02-16 14:09:33,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-16 14:09:33,035 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:33,035 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:33,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-16 14:09:33,257 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 [2022-02-16 14:09:33,257 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:09:33,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:33,258 INFO L85 PathProgramCache]: Analyzing trace with hash -625525692, now seen corresponding path program 9 times [2022-02-16 14:09:33,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:33,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261543250] [2022-02-16 14:09:33,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:33,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:09:33,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:33,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261543250] [2022-02-16 14:09:33,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261543250] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:33,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049861719] [2022-02-16 14:09:33,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:09:33,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:33,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:33,512 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) [2022-02-16 14:09:33,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-16 14:09:33,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-16 14:09:33,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:09:33,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:09:33,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:34,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:09:34,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:09:34,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:09:34,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:09:34,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:09:34,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:09:34,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:09:34,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-02-16 14:09:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:34,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:34,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:09:34,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:09:34,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:09:34,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:09:34,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:09:34,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:09:34,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:09:34,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:09:34,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 36 treesize of output 94 [2022-02-16 14:09:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:35,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049861719] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:35,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:35,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-02-16 14:09:35,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550971164] [2022-02-16 14:09:35,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:35,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-16 14:09:35,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:35,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-16 14:09:35,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1688, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 14:09:35,425 INFO L87 Difference]: Start difference. First operand 584 states and 948 transitions. Second operand has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 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) [2022-02-16 14:09:40,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:40,410 INFO L93 Difference]: Finished difference Result 1414 states and 2314 transitions. [2022-02-16 14:09:40,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-02-16 14:09:40,411 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 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) Word has length 37 [2022-02-16 14:09:40,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:40,414 INFO L225 Difference]: With dead ends: 1414 [2022-02-16 14:09:40,414 INFO L226 Difference]: Without dead ends: 1399 [2022-02-16 14:09:40,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10925 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4628, Invalid=25128, Unknown=0, NotChecked=0, Total=29756 [2022-02-16 14:09:40,418 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 290 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 2403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1059 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:40,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 407 Invalid, 2403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1138 Invalid, 0 Unknown, 1059 Unchecked, 0.6s Time] [2022-02-16 14:09:40,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2022-02-16 14:09:40,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 693. [2022-02-16 14:09:40,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 1.6589595375722543) internal successors, (1148), 692 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:40,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 1148 transitions. [2022-02-16 14:09:40,434 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 1148 transitions. Word has length 37 [2022-02-16 14:09:40,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:40,434 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 1148 transitions. [2022-02-16 14:09:40,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 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) [2022-02-16 14:09:40,434 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 1148 transitions. [2022-02-16 14:09:40,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-16 14:09:40,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:40,436 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:40,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-16 14:09:40,659 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 [2022-02-16 14:09:40,660 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:09:40,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:40,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1367946808, now seen corresponding path program 10 times [2022-02-16 14:09:40,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:40,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836144761] [2022-02-16 14:09:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:40,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:09:40,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:40,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836144761] [2022-02-16 14:09:40,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836144761] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:40,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676148848] [2022-02-16 14:09:40,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:09:40,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:40,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:40,875 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) [2022-02-16 14:09:40,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-16 14:09:40,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:09:40,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:09:40,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:09:40,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:41,353 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-16 14:09:41,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-02-16 14:09:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:41,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:09:41,819 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:09:41,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-02-16 14:09:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:42,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676148848] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:09:42,307 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:09:42,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-02-16 14:09:42,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771795033] [2022-02-16 14:09:42,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:09:42,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-16 14:09:42,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:09:42,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-16 14:09:42,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1732, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 14:09:42,308 INFO L87 Difference]: Start difference. First operand 693 states and 1148 transitions. Second operand has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:58,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:09:58,657 INFO L93 Difference]: Finished difference Result 3016 states and 4683 transitions. [2022-02-16 14:09:58,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 311 states. [2022-02-16 14:09:58,657 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-02-16 14:09:58,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:09:58,664 INFO L225 Difference]: With dead ends: 3016 [2022-02-16 14:09:58,664 INFO L226 Difference]: Without dead ends: 2770 [2022-02-16 14:09:58,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53878 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=18662, Invalid=104890, Unknown=0, NotChecked=0, Total=123552 [2022-02-16 14:09:58,676 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 589 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 3688 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 4324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 3688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-16 14:09:58,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 1004 Invalid, 4324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 3688 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-16 14:09:58,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2022-02-16 14:09:58,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 498. [2022-02-16 14:09:58,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 1.5975855130784709) internal successors, (794), 497 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:58,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 794 transitions. [2022-02-16 14:09:58,694 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 794 transitions. Word has length 37 [2022-02-16 14:09:58,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:09:58,694 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 794 transitions. [2022-02-16 14:09:58,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:09:58,695 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 794 transitions. [2022-02-16 14:09:58,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-16 14:09:58,695 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:09:58,696 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:09:58,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-16 14:09:58,915 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 [2022-02-16 14:09:58,915 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:09:58,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:09:58,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1550576320, now seen corresponding path program 11 times [2022-02-16 14:09:58,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:09:58,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4955776] [2022-02-16 14:09:58,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:09:58,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:09:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:09:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:09:59,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:09:59,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4955776] [2022-02-16 14:09:59,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4955776] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:09:59,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142393710] [2022-02-16 14:09:59,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:09:59,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:09:59,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:09:59,164 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) [2022-02-16 14:09:59,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-16 14:09:59,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-16 14:09:59,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:09:59,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:09:59,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:09:59,688 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-16 14:09:59,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-02-16 14:09:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:09:59,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:10:00,151 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:10:00,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-02-16 14:10:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:00,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142393710] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:10:00,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:10:00,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-02-16 14:10:00,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334830961] [2022-02-16 14:10:00,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:10:00,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-16 14:10:00,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:10:00,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-16 14:10:00,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1734, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 14:10:00,762 INFO L87 Difference]: Start difference. First operand 498 states and 794 transitions. Second operand has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 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) [2022-02-16 14:10:17,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:10:17,972 INFO L93 Difference]: Finished difference Result 2205 states and 3284 transitions. [2022-02-16 14:10:17,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 323 states. [2022-02-16 14:10:17,972 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 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) Word has length 37 [2022-02-16 14:10:17,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:10:17,977 INFO L225 Difference]: With dead ends: 2205 [2022-02-16 14:10:17,977 INFO L226 Difference]: Without dead ends: 2163 [2022-02-16 14:10:17,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 362 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57822 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=18570, Invalid=113562, Unknown=0, NotChecked=0, Total=132132 [2022-02-16 14:10:17,983 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 526 mSDsluCounter, 1465 mSDsCounter, 0 mSdLazyCounter, 4033 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 4596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 4033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-16 14:10:17,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 1036 Invalid, 4596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 4033 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-16 14:10:17,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2022-02-16 14:10:17,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 577. [2022-02-16 14:10:17,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 1.6232638888888888) internal successors, (935), 576 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:17,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 935 transitions. [2022-02-16 14:10:17,998 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 935 transitions. Word has length 37 [2022-02-16 14:10:17,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:10:17,999 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 935 transitions. [2022-02-16 14:10:17,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 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) [2022-02-16 14:10:17,999 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 935 transitions. [2022-02-16 14:10:18,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-16 14:10:18,000 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:10:18,000 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:10:18,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-02-16 14:10:18,215 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 [2022-02-16 14:10:18,215 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:10:18,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:10:18,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1456721178, now seen corresponding path program 12 times [2022-02-16 14:10:18,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:10:18,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915746530] [2022-02-16 14:10:18,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:10:18,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:10:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:10:18,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:10:18,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915746530] [2022-02-16 14:10:18,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915746530] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:10:18,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358900868] [2022-02-16 14:10:18,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:10:18,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:18,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:10:18,452 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) [2022-02-16 14:10:18,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-16 14:10:18,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 14:10:18,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:10:18,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-16 14:10:18,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:10:18,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:10:18,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:10:18,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:10:18,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:10:18,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:10:18,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:10:18,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2022-02-16 14:10:19,035 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:19,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:10:19,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:10:19,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:10:19,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:10:19,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:10:19,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:10:19,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:10:19,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:10:19,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:10:19,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 98 [2022-02-16 14:10:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:19,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358900868] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:10:19,888 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:10:19,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-02-16 14:10:19,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147116647] [2022-02-16 14:10:19,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:10:19,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-16 14:10:19,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:10:19,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-16 14:10:19,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1586, Unknown=0, NotChecked=0, Total=1892 [2022-02-16 14:10:19,890 INFO L87 Difference]: Start difference. First operand 577 states and 935 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 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) [2022-02-16 14:10:37,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:10:37,441 INFO L93 Difference]: Finished difference Result 3247 states and 4969 transitions. [2022-02-16 14:10:37,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 293 states. [2022-02-16 14:10:37,441 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 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) Word has length 37 [2022-02-16 14:10:37,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:10:37,448 INFO L225 Difference]: With dead ends: 3247 [2022-02-16 14:10:37,448 INFO L226 Difference]: Without dead ends: 3057 [2022-02-16 14:10:37,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50673 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=18273, Invalid=92283, Unknown=0, NotChecked=0, Total=110556 [2022-02-16 14:10:37,458 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 983 mSDsluCounter, 1493 mSDsCounter, 0 mSdLazyCounter, 3681 mSolverCounterSat, 962 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 4968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 962 IncrementalHoareTripleChecker+Valid, 3681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:10:37,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 1088 Invalid, 4968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [962 Valid, 3681 Invalid, 0 Unknown, 325 Unchecked, 2.0s Time] [2022-02-16 14:10:37,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3057 states. [2022-02-16 14:10:37,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3057 to 879. [2022-02-16 14:10:37,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 1.6924829157175398) internal successors, (1486), 878 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:37,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1486 transitions. [2022-02-16 14:10:37,483 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1486 transitions. Word has length 37 [2022-02-16 14:10:37,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:10:37,484 INFO L470 AbstractCegarLoop]: Abstraction has 879 states and 1486 transitions. [2022-02-16 14:10:37,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 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) [2022-02-16 14:10:37,484 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1486 transitions. [2022-02-16 14:10:37,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-16 14:10:37,485 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:10:37,485 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:10:37,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-02-16 14:10:37,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-16 14:10:37,703 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:10:37,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:10:37,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2059691200, now seen corresponding path program 13 times [2022-02-16 14:10:37,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:10:37,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072841743] [2022-02-16 14:10:37,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:10:37,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:10:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:37,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:10:37,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072841743] [2022-02-16 14:10:37,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072841743] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:10:37,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652433013] [2022-02-16 14:10:37,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:10:37,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:37,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:10:37,964 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) [2022-02-16 14:10:37,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-16 14:10:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:37,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:10:37,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:10:38,450 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-16 14:10:38,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-02-16 14:10:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:38,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:10:38,905 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:10:38,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-02-16 14:10:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:39,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652433013] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:10:39,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:10:39,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-02-16 14:10:39,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998626704] [2022-02-16 14:10:39,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:10:39,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-16 14:10:39,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:10:39,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-16 14:10:39,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1782, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 14:10:39,385 INFO L87 Difference]: Start difference. First operand 879 states and 1486 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:46,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:10:46,782 INFO L93 Difference]: Finished difference Result 3536 states and 5692 transitions. [2022-02-16 14:10:46,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-02-16 14:10:46,783 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-02-16 14:10:46,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:10:46,791 INFO L225 Difference]: With dead ends: 3536 [2022-02-16 14:10:46,792 INFO L226 Difference]: Without dead ends: 3370 [2022-02-16 14:10:46,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15501 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=6339, Invalid=35481, Unknown=0, NotChecked=0, Total=41820 [2022-02-16 14:10:46,795 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 509 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 2026 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 2026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:10:46,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 459 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 2026 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-16 14:10:46,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3370 states. [2022-02-16 14:10:46,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3370 to 1018. [2022-02-16 14:10:46,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 1.6991150442477876) internal successors, (1728), 1017 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1728 transitions. [2022-02-16 14:10:46,821 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1728 transitions. Word has length 37 [2022-02-16 14:10:46,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:10:46,821 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 1728 transitions. [2022-02-16 14:10:46,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:46,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1728 transitions. [2022-02-16 14:10:46,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-16 14:10:46,823 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:10:46,823 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:10:46,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-02-16 14:10:47,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-16 14:10:47,037 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:10:47,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:10:47,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1672076424, now seen corresponding path program 14 times [2022-02-16 14:10:47,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:10:47,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302640641] [2022-02-16 14:10:47,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:10:47,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:10:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:47,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:10:47,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302640641] [2022-02-16 14:10:47,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302640641] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:10:47,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723588169] [2022-02-16 14:10:47,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:10:47,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:47,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:10:47,282 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) [2022-02-16 14:10:47,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-16 14:10:47,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:10:47,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:10:47,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:10:47,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:10:47,761 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-16 14:10:47,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-02-16 14:10:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:47,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:10:48,232 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:10:48,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-02-16 14:10:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:48,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723588169] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:10:48,700 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:10:48,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-02-16 14:10:48,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792110839] [2022-02-16 14:10:48,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:10:48,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-16 14:10:48,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:10:48,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-16 14:10:48,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1797, Unknown=0, NotChecked=0, Total=2070 [2022-02-16 14:10:48,702 INFO L87 Difference]: Start difference. First operand 1018 states and 1728 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 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) [2022-02-16 14:10:57,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:10:57,262 INFO L93 Difference]: Finished difference Result 2658 states and 4282 transitions. [2022-02-16 14:10:57,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2022-02-16 14:10:57,263 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 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) Word has length 37 [2022-02-16 14:10:57,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:10:57,270 INFO L225 Difference]: With dead ends: 2658 [2022-02-16 14:10:57,270 INFO L226 Difference]: Without dead ends: 2604 [2022-02-16 14:10:57,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15734 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=6768, Invalid=37542, Unknown=0, NotChecked=0, Total=44310 [2022-02-16 14:10:57,277 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 371 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 2463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:10:57,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 393 Invalid, 2463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 2126 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-16 14:10:57,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2022-02-16 14:10:57,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 986. [2022-02-16 14:10:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 1.6791878172588832) internal successors, (1654), 985 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:10:57,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1654 transitions. [2022-02-16 14:10:57,301 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1654 transitions. Word has length 37 [2022-02-16 14:10:57,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:10:57,302 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 1654 transitions. [2022-02-16 14:10:57,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 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) [2022-02-16 14:10:57,302 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1654 transitions. [2022-02-16 14:10:57,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-16 14:10:57,304 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:10:57,304 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:10:57,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-16 14:10:57,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:57,520 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:10:57,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:10:57,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1511907652, now seen corresponding path program 15 times [2022-02-16 14:10:57,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:10:57,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345590771] [2022-02-16 14:10:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:10:57,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:10:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:10:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-16 14:10:57,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:10:57,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345590771] [2022-02-16 14:10:57,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345590771] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:10:57,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378850405] [2022-02-16 14:10:57,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:10:57,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:10:57,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:10:57,738 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) [2022-02-16 14:10:57,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-16 14:10:57,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 14:10:57,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:10:57,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-16 14:10:57,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:10:58,196 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-16 14:10:58,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2022-02-16 14:10:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:58,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:10:58,657 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-16 14:10:58,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 40 treesize of output 104 [2022-02-16 14:10:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:10:59,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378850405] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:10:59,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:10:59,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-02-16 14:10:59,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024585070] [2022-02-16 14:10:59,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:10:59,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-16 14:10:59,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:10:59,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-16 14:10:59,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1721, Unknown=0, NotChecked=0, Total=1980 [2022-02-16 14:10:59,258 INFO L87 Difference]: Start difference. First operand 986 states and 1654 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 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) [2022-02-16 14:11:13,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:11:13,061 INFO L93 Difference]: Finished difference Result 3564 states and 5705 transitions. [2022-02-16 14:11:13,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2022-02-16 14:11:13,062 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 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) Word has length 37 [2022-02-16 14:11:13,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:11:13,070 INFO L225 Difference]: With dead ends: 3564 [2022-02-16 14:11:13,070 INFO L226 Difference]: Without dead ends: 3509 [2022-02-16 14:11:13,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37449 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=13110, Invalid=75396, Unknown=0, NotChecked=0, Total=88506 [2022-02-16 14:11:13,110 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 494 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 2478 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 3054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 2478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:11:13,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 373 Invalid, 3054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 2478 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-16 14:11:13,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-02-16 14:11:13,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 1041. [2022-02-16 14:11:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 1040 states have (on average 1.6807692307692308) internal successors, (1748), 1040 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:11:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1748 transitions. [2022-02-16 14:11:13,135 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1748 transitions. Word has length 37 [2022-02-16 14:11:13,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:11:13,135 INFO L470 AbstractCegarLoop]: Abstraction has 1041 states and 1748 transitions. [2022-02-16 14:11:13,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 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) [2022-02-16 14:11:13,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1748 transitions. [2022-02-16 14:11:13,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-16 14:11:13,137 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:11:13,137 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:11:13,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-02-16 14:11:13,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-16 14:11:13,341 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:11:13,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:11:13,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1967048907, now seen corresponding path program 16 times [2022-02-16 14:11:13,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:11:13,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908763017] [2022-02-16 14:11:13,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:11:13,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:11:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:11:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:13,378 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:11:13,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908763017] [2022-02-16 14:11:13,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908763017] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:11:13,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229680431] [2022-02-16 14:11:13,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:11:13,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:11:13,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:11:13,380 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) [2022-02-16 14:11:13,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-16 14:11:13,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:11:13,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:11:13,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-16 14:11:13,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:11:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:13,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:11:13,554 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:13,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229680431] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:11:13,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:11:13,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-02-16 14:11:13,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946227704] [2022-02-16 14:11:13,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:11:13,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-16 14:11:13,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:11:13,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-16 14:11:13,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-02-16 14:11:13,556 INFO L87 Difference]: Start difference. First operand 1041 states and 1748 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:11:13,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:11:13,590 INFO L93 Difference]: Finished difference Result 1625 states and 2695 transitions. [2022-02-16 14:11:13,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-16 14:11:13,590 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-16 14:11:13,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:11:13,598 INFO L225 Difference]: With dead ends: 1625 [2022-02-16 14:11:13,598 INFO L226 Difference]: Without dead ends: 1603 [2022-02-16 14:11:13,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-02-16 14:11:13,599 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 66 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 14:11:13,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 118 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 14:11:13,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2022-02-16 14:11:13,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1363. [2022-02-16 14:11:13,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 1.7011747430249633) internal successors, (2317), 1362 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:11:13,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 2317 transitions. [2022-02-16 14:11:13,619 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 2317 transitions. Word has length 40 [2022-02-16 14:11:13,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:11:13,619 INFO L470 AbstractCegarLoop]: Abstraction has 1363 states and 2317 transitions. [2022-02-16 14:11:13,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:11:13,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 2317 transitions. [2022-02-16 14:11:13,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-16 14:11:13,622 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:11:13,622 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:11:13,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-16 14:11:13,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:11:13,843 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:11:13,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:11:13,844 INFO L85 PathProgramCache]: Analyzing trace with hash 720893605, now seen corresponding path program 17 times [2022-02-16 14:11:13,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:11:13,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185095481] [2022-02-16 14:11:13,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:11:13,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:11:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:11:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:14,195 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:11:14,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185095481] [2022-02-16 14:11:14,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185095481] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:11:14,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132827116] [2022-02-16 14:11:14,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:11:14,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:11:14,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:11:14,196 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) [2022-02-16 14:11:14,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-16 14:11:14,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 14:11:14,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:11:14,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-16 14:11:14,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:11:15,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:11:15,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:11:15,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:11:15,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:11:15,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:11:15,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:11:15,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:11:15,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:11:15,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:11:15,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:11:15,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:11:15,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:11:15,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2022-02-16 14:11:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:15,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:11:16,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:11:16,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:11:16,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:11:16,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:11:16,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:11:16,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:11:16,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:11:16,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:11:16,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:11:16,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:11:16,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:11:16,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:11:16,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:11:16,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:11:16,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:11:16,153 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:11:16,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 49 treesize of output 153 [2022-02-16 14:11:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:16,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132827116] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:11:16,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:11:16,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-02-16 14:11:16,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248706234] [2022-02-16 14:11:16,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:11:16,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-16 14:11:16,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:11:16,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-16 14:11:16,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=2805, Unknown=0, NotChecked=0, Total=3306 [2022-02-16 14:11:16,964 INFO L87 Difference]: Start difference. First operand 1363 states and 2317 transitions. Second operand has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:11:44,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:11:44,308 INFO L93 Difference]: Finished difference Result 4318 states and 6636 transitions. [2022-02-16 14:11:44,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-02-16 14:11:44,309 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-16 14:11:44,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:11:44,315 INFO L225 Difference]: With dead ends: 4318 [2022-02-16 14:11:44,315 INFO L226 Difference]: Without dead ends: 4172 [2022-02-16 14:11:44,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 75 SyntacticMatches, 12 SemanticMatches, 425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84416 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=25700, Invalid=156202, Unknown=0, NotChecked=0, Total=181902 [2022-02-16 14:11:44,325 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 918 mSDsluCounter, 2123 mSDsCounter, 0 mSdLazyCounter, 2692 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 7741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 2692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4565 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:11:44,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 1545 Invalid, 7741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 2692 Invalid, 0 Unknown, 4565 Unchecked, 1.3s Time] [2022-02-16 14:11:44,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2022-02-16 14:11:44,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 1672. [2022-02-16 14:11:44,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 1.698982645122681) internal successors, (2839), 1671 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:11:44,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2839 transitions. [2022-02-16 14:11:44,363 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2839 transitions. Word has length 43 [2022-02-16 14:11:44,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:11:44,363 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 2839 transitions. [2022-02-16 14:11:44,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:11:44,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2839 transitions. [2022-02-16 14:11:44,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-16 14:11:44,367 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:11:44,367 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:11:44,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-16 14:11:44,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:11:44,589 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:11:44,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:11:44,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1420185947, now seen corresponding path program 18 times [2022-02-16 14:11:44,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:11:44,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141608538] [2022-02-16 14:11:44,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:11:44,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:11:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:11:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:44,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:11:44,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141608538] [2022-02-16 14:11:44,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141608538] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:11:44,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150731545] [2022-02-16 14:11:44,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:11:44,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:11:44,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:11:44,951 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) [2022-02-16 14:11:44,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-16 14:11:44,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 14:11:44,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:11:44,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-16 14:11:44,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:11:45,706 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-16 14:11:45,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-16 14:11:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:45,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:11:46,462 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-16 14:11:46,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-16 14:11:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:11:47,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150731545] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:11:47,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:11:47,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-02-16 14:11:47,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519370115] [2022-02-16 14:11:47,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:11:47,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-16 14:11:47,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:11:47,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-16 14:11:47,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=2907, Unknown=0, NotChecked=0, Total=3306 [2022-02-16 14:11:47,769 INFO L87 Difference]: Start difference. First operand 1672 states and 2839 transitions. Second operand has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:12:20,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:12:20,622 INFO L93 Difference]: Finished difference Result 5434 states and 8419 transitions. [2022-02-16 14:12:20,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 492 states. [2022-02-16 14:12:20,623 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-16 14:12:20,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:12:20,629 INFO L225 Difference]: With dead ends: 5434 [2022-02-16 14:12:20,629 INFO L226 Difference]: Without dead ends: 5109 [2022-02-16 14:12:20,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 544 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133308 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=40195, Invalid=257375, Unknown=0, NotChecked=0, Total=297570 [2022-02-16 14:12:20,647 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 668 mSDsluCounter, 1526 mSDsCounter, 0 mSdLazyCounter, 7091 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 7723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 7091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:12:20,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [668 Valid, 1147 Invalid, 7723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 7091 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-16 14:12:20,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5109 states. [2022-02-16 14:12:20,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5109 to 1794. [2022-02-16 14:12:20,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 1.6965978806469604) internal successors, (3042), 1793 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:12:20,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 3042 transitions. [2022-02-16 14:12:20,687 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 3042 transitions. Word has length 43 [2022-02-16 14:12:20,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:12:20,688 INFO L470 AbstractCegarLoop]: Abstraction has 1794 states and 3042 transitions. [2022-02-16 14:12:20,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:12:20,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 3042 transitions. [2022-02-16 14:12:20,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-16 14:12:20,691 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:12:20,691 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:12:20,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-16 14:12:20,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:12:20,916 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:12:20,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:12:20,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1139514221, now seen corresponding path program 19 times [2022-02-16 14:12:20,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:12:20,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761956901] [2022-02-16 14:12:20,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:12:20,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:12:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:12:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:12:21,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:12:21,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761956901] [2022-02-16 14:12:21,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761956901] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:12:21,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560599775] [2022-02-16 14:12:21,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:12:21,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:12:21,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:12:21,301 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) [2022-02-16 14:12:21,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-16 14:12:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:12:21,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-16 14:12:21,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:12:22,064 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-16 14:12:22,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-16 14:12:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:12:22,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:12:22,862 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-16 14:12:22,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-16 14:12:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:12:24,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560599775] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:12:24,088 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:12:24,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-02-16 14:12:24,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189738017] [2022-02-16 14:12:24,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:12:24,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-16 14:12:24,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:12:24,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-16 14:12:24,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=2914, Unknown=0, NotChecked=0, Total=3306 [2022-02-16 14:12:24,090 INFO L87 Difference]: Start difference. First operand 1794 states and 3042 transitions. Second operand has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:12:56,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:12:56,836 INFO L93 Difference]: Finished difference Result 4613 states and 7117 transitions. [2022-02-16 14:12:56,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 489 states. [2022-02-16 14:12:56,836 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-16 14:12:56,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:12:56,844 INFO L225 Difference]: With dead ends: 4613 [2022-02-16 14:12:56,845 INFO L226 Difference]: Without dead ends: 4581 [2022-02-16 14:12:56,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 541 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129657 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=39582, Invalid=254724, Unknown=0, NotChecked=0, Total=294306 [2022-02-16 14:12:56,878 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 696 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 4945 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 5579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 4945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:12:56,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 884 Invalid, 5579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 4945 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-16 14:12:56,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4581 states. [2022-02-16 14:12:56,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4581 to 1868. [2022-02-16 14:12:56,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 1.6946973754686663) internal successors, (3164), 1867 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:12:56,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 3164 transitions. [2022-02-16 14:12:56,917 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 3164 transitions. Word has length 43 [2022-02-16 14:12:56,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:12:56,917 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 3164 transitions. [2022-02-16 14:12:56,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:12:56,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 3164 transitions. [2022-02-16 14:12:56,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-16 14:12:56,921 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:12:56,921 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:12:56,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-16 14:12:57,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:12:57,144 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:12:57,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:12:57,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1527128997, now seen corresponding path program 20 times [2022-02-16 14:12:57,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:12:57,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550069440] [2022-02-16 14:12:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:12:57,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:12:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:12:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:12:57,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:12:57,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550069440] [2022-02-16 14:12:57,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550069440] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:12:57,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529940219] [2022-02-16 14:12:57,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:12:57,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:12:57,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:12:57,497 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) [2022-02-16 14:12:57,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-16 14:12:57,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:12:57,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:12:57,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-16 14:12:57,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:12:58,297 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-16 14:12:58,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-16 14:12:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:12:58,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:12:59,082 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-16 14:12:59,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-16 14:13:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:13:00,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529940219] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:13:00,144 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:13:00,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-02-16 14:13:00,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262421738] [2022-02-16 14:13:00,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:13:00,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-16 14:13:00,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:13:00,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-16 14:13:00,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=2922, Unknown=0, NotChecked=0, Total=3306 [2022-02-16 14:13:00,146 INFO L87 Difference]: Start difference. First operand 1868 states and 3164 transitions. Second operand has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:13:33,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:13:33,929 INFO L93 Difference]: Finished difference Result 4479 states and 6974 transitions. [2022-02-16 14:13:33,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 505 states. [2022-02-16 14:13:33,930 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-16 14:13:33,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:13:33,937 INFO L225 Difference]: With dead ends: 4479 [2022-02-16 14:13:33,937 INFO L226 Difference]: Without dead ends: 4452 [2022-02-16 14:13:33,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 557 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136304 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=37031, Invalid=274891, Unknown=0, NotChecked=0, Total=311922 [2022-02-16 14:13:33,970 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 626 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 5683 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 6315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 5683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-16 14:13:33,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 1037 Invalid, 6315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 5683 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-16 14:13:33,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4452 states. [2022-02-16 14:13:34,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4452 to 1992. [2022-02-16 14:13:34,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1992 states, 1991 states have (on average 1.6926167754897037) internal successors, (3370), 1991 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:13:34,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 3370 transitions. [2022-02-16 14:13:34,009 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 3370 transitions. Word has length 43 [2022-02-16 14:13:34,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:13:34,009 INFO L470 AbstractCegarLoop]: Abstraction has 1992 states and 3370 transitions. [2022-02-16 14:13:34,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:13:34,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 3370 transitions. [2022-02-16 14:13:34,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-16 14:13:34,012 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:13:34,012 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:13:34,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-16 14:13:34,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-02-16 14:13:34,227 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:13:34,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:13:34,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2077562711, now seen corresponding path program 21 times [2022-02-16 14:13:34,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:13:34,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859327191] [2022-02-16 14:13:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:13:34,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:13:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:13:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:13:34,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:13:34,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859327191] [2022-02-16 14:13:34,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859327191] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:13:34,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146487951] [2022-02-16 14:13:34,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:13:34,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:13:34,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:13:34,613 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) [2022-02-16 14:13:34,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-16 14:13:34,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 14:13:34,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:13:34,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-16 14:13:34,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:13:35,375 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-16 14:13:35,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-16 14:13:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:13:35,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:13:36,191 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-16 14:13:36,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 52 treesize of output 176 [2022-02-16 14:13:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:13:37,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146487951] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:13:37,959 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:13:37,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 57 [2022-02-16 14:13:37,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308795443] [2022-02-16 14:13:37,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:13:37,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-16 14:13:37,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:13:37,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-16 14:13:37,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=2832, Unknown=0, NotChecked=0, Total=3192 [2022-02-16 14:13:37,960 INFO L87 Difference]: Start difference. First operand 1992 states and 3370 transitions. Second operand has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:14:19,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:14:19,773 INFO L93 Difference]: Finished difference Result 7468 states and 11502 transitions. [2022-02-16 14:14:19,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 610 states. [2022-02-16 14:14:19,774 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-16 14:14:19,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:14:19,781 INFO L225 Difference]: With dead ends: 7468 [2022-02-16 14:14:19,781 INFO L226 Difference]: Without dead ends: 7173 [2022-02-16 14:14:19,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 661 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202914 ImplicationChecksByTransitivity, 38.4s TimeCoverageRelationStatistics Valid=53559, Invalid=385347, Unknown=0, NotChecked=0, Total=438906 [2022-02-16 14:14:19,808 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 698 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 7784 mSolverCounterSat, 744 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 8528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 744 IncrementalHoareTripleChecker+Valid, 7784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-02-16 14:14:19,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 1639 Invalid, 8528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [744 Valid, 7784 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-02-16 14:14:19,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7173 states. [2022-02-16 14:14:19,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7173 to 2213. [2022-02-16 14:14:19,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 2212 states have (on average 1.6989150090415914) internal successors, (3758), 2212 states have internal predecessors, (3758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:14:19,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 3758 transitions. [2022-02-16 14:14:19,855 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 3758 transitions. Word has length 43 [2022-02-16 14:14:19,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:14:19,855 INFO L470 AbstractCegarLoop]: Abstraction has 2213 states and 3758 transitions. [2022-02-16 14:14:19,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:14:19,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 3758 transitions. [2022-02-16 14:14:19,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-16 14:14:19,859 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:14:19,859 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:14:19,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-16 14:14:20,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-02-16 14:14:20,083 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:14:20,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:14:20,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1689947935, now seen corresponding path program 22 times [2022-02-16 14:14:20,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:14:20,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352564091] [2022-02-16 14:14:20,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:14:20,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:14:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:14:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:14:20,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:14:20,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352564091] [2022-02-16 14:14:20,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352564091] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:14:20,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843531808] [2022-02-16 14:14:20,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:14:20,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:14:20,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:14:20,418 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) [2022-02-16 14:14:20,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-16 14:14:20,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:14:20,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:14:20,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-16 14:14:20,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:14:21,175 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-16 14:14:21,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-16 14:14:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:14:21,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:14:21,958 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-16 14:14:21,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-16 14:14:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:14:23,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843531808] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:14:23,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:14:23,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 57 [2022-02-16 14:14:23,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904416135] [2022-02-16 14:14:23,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:14:23,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-16 14:14:23,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:14:23,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-16 14:14:23,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=2837, Unknown=0, NotChecked=0, Total=3192 [2022-02-16 14:14:23,840 INFO L87 Difference]: Start difference. First operand 2213 states and 3758 transitions. Second operand has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:15:02,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:15:02,891 INFO L93 Difference]: Finished difference Result 6167 states and 9701 transitions. [2022-02-16 14:15:02,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 568 states. [2022-02-16 14:15:02,892 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-16 14:15:02,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:15:02,898 INFO L225 Difference]: With dead ends: 6167 [2022-02-16 14:15:02,899 INFO L226 Difference]: Without dead ends: 6115 [2022-02-16 14:15:02,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 619 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173953 ImplicationChecksByTransitivity, 36.4s TimeCoverageRelationStatistics Valid=44520, Invalid=340500, Unknown=0, NotChecked=0, Total=385020 [2022-02-16 14:15:02,930 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 718 mSDsluCounter, 2181 mSDsCounter, 0 mSdLazyCounter, 6367 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 7180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 6367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:15:02,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 1582 Invalid, 7180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [813 Valid, 6367 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-02-16 14:15:02,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6115 states. [2022-02-16 14:15:02,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6115 to 2429. [2022-02-16 14:15:02,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 2428 states have (on average 1.7038714991762767) internal successors, (4137), 2428 states have internal predecessors, (4137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:15:02,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 4137 transitions. [2022-02-16 14:15:02,978 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 4137 transitions. Word has length 43 [2022-02-16 14:15:02,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:15:02,978 INFO L470 AbstractCegarLoop]: Abstraction has 2429 states and 4137 transitions. [2022-02-16 14:15:02,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:15:02,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 4137 transitions. [2022-02-16 14:15:02,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-16 14:15:02,983 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:15:02,983 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:15:03,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-16 14:15:03,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:15:03,206 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:15:03,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:15:03,206 INFO L85 PathProgramCache]: Analyzing trace with hash 540468931, now seen corresponding path program 23 times [2022-02-16 14:15:03,206 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:15:03,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601079047] [2022-02-16 14:15:03,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:15:03,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:15:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:15:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:15:03,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:15:03,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601079047] [2022-02-16 14:15:03,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601079047] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:15:03,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784550900] [2022-02-16 14:15:03,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:15:03,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:15:03,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:15:03,521 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) [2022-02-16 14:15:03,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-16 14:15:03,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 14:15:03,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:15:03,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-16 14:15:03,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:15:04,338 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-16 14:15:04,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-16 14:15:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:15:04,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:15:05,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:15:05,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:15:05,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:15:05,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:15:05,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:15:05,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:15:05,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:15:05,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:15:05,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:15:05,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:15:05,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:15:05,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:15:05,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:15:05,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:15:05,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:15:05,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:15:05,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:15:05,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:15:05,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:15:05,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 135 [2022-02-16 14:15:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:15:05,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784550900] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:15:05,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:15:05,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 56 [2022-02-16 14:15:05,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422172348] [2022-02-16 14:15:05,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:15:05,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-16 14:15:05,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:15:05,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-16 14:15:05,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=2607, Unknown=0, NotChecked=0, Total=3080 [2022-02-16 14:15:05,562 INFO L87 Difference]: Start difference. First operand 2429 states and 4137 transitions. Second operand has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:15:40,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:15:40,461 INFO L93 Difference]: Finished difference Result 10638 states and 17350 transitions. [2022-02-16 14:15:40,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 475 states. [2022-02-16 14:15:40,462 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-16 14:15:40,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:15:40,475 INFO L225 Difference]: With dead ends: 10638 [2022-02-16 14:15:40,475 INFO L226 Difference]: Without dead ends: 10277 [2022-02-16 14:15:40,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 525 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133095 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=42344, Invalid=234858, Unknown=0, NotChecked=0, Total=277202 [2022-02-16 14:15:40,499 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 1376 mSDsluCounter, 1852 mSDsCounter, 0 mSdLazyCounter, 5718 mSolverCounterSat, 1345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1376 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 7063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1345 IncrementalHoareTripleChecker+Valid, 5718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:15:40,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1376 Valid, 1401 Invalid, 7063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1345 Valid, 5718 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-16 14:15:40,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10277 states. [2022-02-16 14:15:40,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10277 to 3494. [2022-02-16 14:15:40,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3494 states, 3493 states have (on average 1.7466361294016604) internal successors, (6101), 3493 states have internal predecessors, (6101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:15:40,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3494 states to 3494 states and 6101 transitions. [2022-02-16 14:15:40,592 INFO L78 Accepts]: Start accepts. Automaton has 3494 states and 6101 transitions. Word has length 43 [2022-02-16 14:15:40,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:15:40,592 INFO L470 AbstractCegarLoop]: Abstraction has 3494 states and 6101 transitions. [2022-02-16 14:15:40,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:15:40,592 INFO L276 IsEmpty]: Start isEmpty. Operand 3494 states and 6101 transitions. [2022-02-16 14:15:40,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-16 14:15:40,597 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:15:40,597 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:15:40,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-16 14:15:40,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:15:40,820 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:15:40,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:15:40,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1086049285, now seen corresponding path program 24 times [2022-02-16 14:15:40,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:15:40,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599607447] [2022-02-16 14:15:40,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:15:40,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:15:40,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:15:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:15:41,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:15:41,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599607447] [2022-02-16 14:15:41,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599607447] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:15:41,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938626727] [2022-02-16 14:15:41,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:15:41,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:15:41,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:15:41,148 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) [2022-02-16 14:15:41,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-16 14:15:41,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-16 14:15:41,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:15:41,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-16 14:15:41,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:15:41,949 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-16 14:15:41,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-16 14:15:42,037 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:15:42,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:15:42,719 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-16 14:15:42,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-16 14:15:44,562 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:15:44,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938626727] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:15:44,562 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:15:44,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 56 [2022-02-16 14:15:44,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182323085] [2022-02-16 14:15:44,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:15:44,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-16 14:15:44,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:15:44,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-16 14:15:44,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=2721, Unknown=0, NotChecked=0, Total=3080 [2022-02-16 14:15:44,563 INFO L87 Difference]: Start difference. First operand 3494 states and 6101 transitions. Second operand has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:16:21,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:16:21,809 INFO L93 Difference]: Finished difference Result 11103 states and 18458 transitions. [2022-02-16 14:16:21,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 565 states. [2022-02-16 14:16:21,810 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-16 14:16:21,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:16:21,822 INFO L225 Difference]: With dead ends: 11103 [2022-02-16 14:16:21,822 INFO L226 Difference]: Without dead ends: 11047 [2022-02-16 14:16:21,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 615 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176334 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=45687, Invalid=334385, Unknown=0, NotChecked=0, Total=380072 [2022-02-16 14:16:21,841 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 978 mSDsluCounter, 2362 mSDsCounter, 0 mSdLazyCounter, 6670 mSolverCounterSat, 1098 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 7768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1098 IncrementalHoareTripleChecker+Valid, 6670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:16:21,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [978 Valid, 1726 Invalid, 7768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1098 Valid, 6670 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-02-16 14:16:21,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11047 states. [2022-02-16 14:16:21,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11047 to 4379. [2022-02-16 14:16:21,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4379 states, 4378 states have (on average 1.7633622658748287) internal successors, (7720), 4378 states have internal predecessors, (7720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:16:21,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4379 states to 4379 states and 7720 transitions. [2022-02-16 14:16:21,918 INFO L78 Accepts]: Start accepts. Automaton has 4379 states and 7720 transitions. Word has length 43 [2022-02-16 14:16:21,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:16:21,918 INFO L470 AbstractCegarLoop]: Abstraction has 4379 states and 7720 transitions. [2022-02-16 14:16:21,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:16:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 4379 states and 7720 transitions. [2022-02-16 14:16:21,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-16 14:16:21,924 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:16:21,924 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:16:21,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-16 14:16:22,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-16 14:16:22,134 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:16:22,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:16:22,134 INFO L85 PathProgramCache]: Analyzing trace with hash 201620513, now seen corresponding path program 25 times [2022-02-16 14:16:22,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:16:22,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334592919] [2022-02-16 14:16:22,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:16:22,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:16:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:16:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 14:16:22,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:16:22,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334592919] [2022-02-16 14:16:22,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334592919] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:16:22,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648498906] [2022-02-16 14:16:22,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:16:22,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:16:22,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:16:22,464 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) [2022-02-16 14:16:22,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-16 14:16:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:16:22,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-16 14:16:22,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:16:23,216 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-16 14:16:23,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-16 14:16:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:16:23,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:16:23,995 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-16 14:16:23,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-16 14:16:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:16:25,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648498906] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:16:25,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:16:25,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 22] total 55 [2022-02-16 14:16:25,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218247687] [2022-02-16 14:16:25,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:16:25,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-16 14:16:25,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:16:25,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-16 14:16:25,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=2590, Unknown=0, NotChecked=0, Total=2970 [2022-02-16 14:16:25,351 INFO L87 Difference]: Start difference. First operand 4379 states and 7720 transitions. Second operand has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:16:49,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:16:49,749 INFO L93 Difference]: Finished difference Result 14417 states and 24893 transitions. [2022-02-16 14:16:49,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 379 states. [2022-02-16 14:16:49,750 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-16 14:16:49,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:16:49,769 INFO L225 Difference]: With dead ends: 14417 [2022-02-16 14:16:49,769 INFO L226 Difference]: Without dead ends: 14199 [2022-02-16 14:16:49,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 428 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83122 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=25162, Invalid=159308, Unknown=0, NotChecked=0, Total=184470 [2022-02-16 14:16:49,782 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1024 mSDsluCounter, 1994 mSDsCounter, 0 mSdLazyCounter, 5382 mSolverCounterSat, 1461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 6843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1461 IncrementalHoareTripleChecker+Valid, 5382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-16 14:16:49,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1024 Valid, 1502 Invalid, 6843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1461 Valid, 5382 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-02-16 14:16:49,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14199 states. [2022-02-16 14:16:49,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14199 to 5598. [2022-02-16 14:16:49,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5598 states, 5597 states have (on average 1.7789887439699839) internal successors, (9957), 5597 states have internal predecessors, (9957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:16:49,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5598 states to 5598 states and 9957 transitions. [2022-02-16 14:16:49,890 INFO L78 Accepts]: Start accepts. Automaton has 5598 states and 9957 transitions. Word has length 43 [2022-02-16 14:16:49,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:16:49,891 INFO L470 AbstractCegarLoop]: Abstraction has 5598 states and 9957 transitions. [2022-02-16 14:16:49,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:16:49,891 INFO L276 IsEmpty]: Start isEmpty. Operand 5598 states and 9957 transitions. [2022-02-16 14:16:49,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-16 14:16:49,898 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:16:49,898 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:16:49,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-16 14:16:50,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-16 14:16:50,121 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:16:50,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:16:50,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1573475569, now seen corresponding path program 26 times [2022-02-16 14:16:50,121 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:16:50,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771336228] [2022-02-16 14:16:50,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:16:50,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:16:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:16:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:16:50,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:16:50,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771336228] [2022-02-16 14:16:50,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771336228] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:16:50,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344047861] [2022-02-16 14:16:50,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:16:50,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:16:50,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:16:50,472 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) [2022-02-16 14:16:50,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-16 14:16:50,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:16:50,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:16:50,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-16 14:16:50,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:16:51,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:16:51,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:16:51,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:16:51,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:16:51,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:16:51,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:16:51,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:16:51,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2022-02-16 14:16:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:16:51,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:16:52,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:16:52,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:16:52,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:16:52,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:16:52,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:16:52,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:16:52,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:16:52,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:16:52,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:16:52,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:16:52,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:16:52,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:16:52,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:16:52,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:16:52,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:16:52,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:16:52,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 49 treesize of output 153 [2022-02-16 14:16:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:16:53,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344047861] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:16:53,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:16:53,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-02-16 14:16:53,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117109194] [2022-02-16 14:16:53,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:16:53,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-16 14:16:53,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:16:53,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-16 14:16:53,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=2821, Unknown=0, NotChecked=0, Total=3306 [2022-02-16 14:16:53,300 INFO L87 Difference]: Start difference. First operand 5598 states and 9957 transitions. Second operand has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:16:57,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:16:57,396 INFO L93 Difference]: Finished difference Result 5963 states and 10424 transitions. [2022-02-16 14:16:57,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-16 14:16:57,397 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-16 14:16:57,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:16:57,403 INFO L225 Difference]: With dead ends: 5963 [2022-02-16 14:16:57,403 INFO L226 Difference]: Without dead ends: 5937 [2022-02-16 14:16:57,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5608 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2399, Invalid=14371, Unknown=0, NotChecked=0, Total=16770 [2022-02-16 14:16:57,405 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 238 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1460 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-16 14:16:57,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 486 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 607 Invalid, 0 Unknown, 1460 Unchecked, 0.3s Time] [2022-02-16 14:16:57,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5937 states. [2022-02-16 14:16:57,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5937 to 5603. [2022-02-16 14:16:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5603 states, 5602 states have (on average 1.7781149589432346) internal successors, (9961), 5602 states have internal predecessors, (9961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:16:57,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 9961 transitions. [2022-02-16 14:16:57,486 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 9961 transitions. Word has length 43 [2022-02-16 14:16:57,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:16:57,486 INFO L470 AbstractCegarLoop]: Abstraction has 5603 states and 9961 transitions. [2022-02-16 14:16:57,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:16:57,486 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 9961 transitions. [2022-02-16 14:16:57,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-16 14:16:57,493 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:16:57,493 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:16:57,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-16 14:16:57,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-16 14:16:57,707 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:16:57,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:16:57,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1961090345, now seen corresponding path program 27 times [2022-02-16 14:16:57,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:16:57,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779266426] [2022-02-16 14:16:57,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:16:57,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:16:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:16:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:16:58,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:16:58,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779266426] [2022-02-16 14:16:58,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779266426] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:16:58,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897002075] [2022-02-16 14:16:58,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:16:58,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:16:58,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:16:58,114 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) [2022-02-16 14:16:58,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-16 14:16:58,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 14:16:58,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:16:58,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-16 14:16:58,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:16:58,890 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-16 14:16:58,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-16 14:16:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:16:58,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:16:59,685 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-16 14:16:59,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-16 14:17:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:17:01,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897002075] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:17:01,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:17:01,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-02-16 14:17:01,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381722507] [2022-02-16 14:17:01,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:17:01,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-16 14:17:01,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:17:01,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-16 14:17:01,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2923, Unknown=0, NotChecked=0, Total=3306 [2022-02-16 14:17:01,405 INFO L87 Difference]: Start difference. First operand 5603 states and 9961 transitions. Second operand has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:17:29,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:17:29,125 INFO L93 Difference]: Finished difference Result 14084 states and 23924 transitions. [2022-02-16 14:17:29,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-02-16 14:17:29,127 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-16 14:17:29,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:17:29,146 INFO L225 Difference]: With dead ends: 14084 [2022-02-16 14:17:29,147 INFO L226 Difference]: Without dead ends: 13874 [2022-02-16 14:17:29,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 456 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89394 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=26497, Invalid=182809, Unknown=0, NotChecked=0, Total=209306 [2022-02-16 14:17:29,162 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 651 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 3986 mSolverCounterSat, 789 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 4775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 789 IncrementalHoareTripleChecker+Valid, 3986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-16 14:17:29,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 658 Invalid, 4775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [789 Valid, 3986 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-16 14:17:29,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13874 states. [2022-02-16 14:17:29,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13874 to 6264. [2022-02-16 14:17:29,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6264 states, 6263 states have (on average 1.777103624461121) internal successors, (11130), 6263 states have internal predecessors, (11130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:17:29,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6264 states to 6264 states and 11130 transitions. [2022-02-16 14:17:29,311 INFO L78 Accepts]: Start accepts. Automaton has 6264 states and 11130 transitions. Word has length 43 [2022-02-16 14:17:29,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:17:29,312 INFO L470 AbstractCegarLoop]: Abstraction has 6264 states and 11130 transitions. [2022-02-16 14:17:29,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:17:29,312 INFO L276 IsEmpty]: Start isEmpty. Operand 6264 states and 11130 transitions. [2022-02-16 14:17:29,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-16 14:17:29,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:17:29,320 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:17:29,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-02-16 14:17:29,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:17:29,543 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:17:29,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:17:29,543 INFO L85 PathProgramCache]: Analyzing trace with hash -320459273, now seen corresponding path program 28 times [2022-02-16 14:17:29,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:17:29,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647335471] [2022-02-16 14:17:29,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:17:29,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:17:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:17:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:17:29,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:17:29,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647335471] [2022-02-16 14:17:29,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647335471] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:17:29,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328978474] [2022-02-16 14:17:29,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:17:29,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:17:29,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:17:29,843 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) [2022-02-16 14:17:29,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-16 14:17:29,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:17:29,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:17:29,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-16 14:17:29,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:17:30,570 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-16 14:17:30,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-16 14:17:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:17:30,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:17:31,349 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-16 14:17:31,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-16 14:17:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:17:33,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328978474] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:17:33,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:17:33,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 56 [2022-02-16 14:17:33,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755365251] [2022-02-16 14:17:33,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:17:33,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-16 14:17:33,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:17:33,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-16 14:17:33,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=2718, Unknown=0, NotChecked=0, Total=3080 [2022-02-16 14:17:33,278 INFO L87 Difference]: Start difference. First operand 6264 states and 11130 transitions. Second operand has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:18:04,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:18:04,985 INFO L93 Difference]: Finished difference Result 19952 states and 34254 transitions. [2022-02-16 14:18:04,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 470 states. [2022-02-16 14:18:04,986 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-16 14:18:04,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:18:05,012 INFO L225 Difference]: With dead ends: 19952 [2022-02-16 14:18:05,012 INFO L226 Difference]: Without dead ends: 19664 [2022-02-16 14:18:05,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 520 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124518 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=35746, Invalid=236216, Unknown=0, NotChecked=0, Total=271962 [2022-02-16 14:18:05,029 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 637 mSDsluCounter, 1532 mSDsCounter, 0 mSdLazyCounter, 5260 mSolverCounterSat, 783 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 6043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 783 IncrementalHoareTripleChecker+Valid, 5260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-16 14:18:05,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 1110 Invalid, 6043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [783 Valid, 5260 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-16 14:18:05,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19664 states. [2022-02-16 14:18:05,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19664 to 7191. [2022-02-16 14:18:05,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7191 states, 7190 states have (on average 1.7749652294853964) internal successors, (12762), 7190 states have internal predecessors, (12762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:18:05,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7191 states to 7191 states and 12762 transitions. [2022-02-16 14:18:05,180 INFO L78 Accepts]: Start accepts. Automaton has 7191 states and 12762 transitions. Word has length 43 [2022-02-16 14:18:05,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:18:05,181 INFO L470 AbstractCegarLoop]: Abstraction has 7191 states and 12762 transitions. [2022-02-16 14:18:05,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:18:05,181 INFO L276 IsEmpty]: Start isEmpty. Operand 7191 states and 12762 transitions. [2022-02-16 14:18:05,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-16 14:18:05,186 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:18:05,186 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:18:05,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-16 14:18:05,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:18:05,387 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:18:05,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:18:05,388 INFO L85 PathProgramCache]: Analyzing trace with hash 67155503, now seen corresponding path program 29 times [2022-02-16 14:18:05,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:18:05,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110186583] [2022-02-16 14:18:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:18:05,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:18:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:18:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:18:05,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:18:05,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110186583] [2022-02-16 14:18:05,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110186583] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:18:05,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867704673] [2022-02-16 14:18:05,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:18:05,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:18:05,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:18:05,692 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) [2022-02-16 14:18:05,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-16 14:18:05,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 14:18:05,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:18:05,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-16 14:18:05,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:18:06,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:18:06,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:18:06,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:18:06,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:18:06,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:06,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:18:06,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:18:06,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:18:06,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:18:06,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:06,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:18:06,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:18:06,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:06,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:18:06,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:18:06,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:06,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2022-02-16 14:18:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:18:06,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:18:07,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:07,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:07,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:07,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:07,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:07,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:07,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:07,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:07,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:07,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:07,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:07,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:07,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:07,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:07,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:07,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:07,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:07,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:18:07,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:18:07,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 135 [2022-02-16 14:18:07,780 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:18:07,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867704673] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:18:07,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:18:07,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 56 [2022-02-16 14:18:07,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559445289] [2022-02-16 14:18:07,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:18:07,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-16 14:18:07,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:18:07,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-16 14:18:07,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2022-02-16 14:18:07,782 INFO L87 Difference]: Start difference. First operand 7191 states and 12762 transitions. Second operand has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:18:21,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:18:21,631 INFO L93 Difference]: Finished difference Result 10839 states and 18782 transitions. [2022-02-16 14:18:21,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-02-16 14:18:21,632 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-16 14:18:21,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:18:21,644 INFO L225 Difference]: With dead ends: 10839 [2022-02-16 14:18:21,645 INFO L226 Difference]: Without dead ends: 10817 [2022-02-16 14:18:21,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 74 SyntacticMatches, 16 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24953 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=8612, Invalid=53140, Unknown=0, NotChecked=0, Total=61752 [2022-02-16 14:18:21,652 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 542 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 2738 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 3806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 2738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:18:21,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 553 Invalid, 3806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 2738 Invalid, 0 Unknown, 367 Unchecked, 1.5s Time] [2022-02-16 14:18:21,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10817 states. [2022-02-16 14:18:21,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10817 to 7719. [2022-02-16 14:18:21,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7719 states, 7718 states have (on average 1.7709251101321586) internal successors, (13668), 7718 states have internal predecessors, (13668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:18:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7719 states to 7719 states and 13668 transitions. [2022-02-16 14:18:21,758 INFO L78 Accepts]: Start accepts. Automaton has 7719 states and 13668 transitions. Word has length 43 [2022-02-16 14:18:21,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:18:21,758 INFO L470 AbstractCegarLoop]: Abstraction has 7719 states and 13668 transitions. [2022-02-16 14:18:21,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:18:21,758 INFO L276 IsEmpty]: Start isEmpty. Operand 7719 states and 13668 transitions. [2022-02-16 14:18:21,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-16 14:18:21,765 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:18:21,765 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:18:21,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-16 14:18:21,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:18:21,966 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:18:21,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:18:21,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1290351525, now seen corresponding path program 30 times [2022-02-16 14:18:21,966 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:18:21,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408284887] [2022-02-16 14:18:21,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:18:21,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:18:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:18:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-16 14:18:22,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:18:22,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408284887] [2022-02-16 14:18:22,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408284887] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:18:22,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258563612] [2022-02-16 14:18:22,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-16 14:18:22,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:18:22,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:18:22,295 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) [2022-02-16 14:18:22,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-16 14:18:22,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-16 14:18:22,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:18:22,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-16 14:18:22,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:18:23,094 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-16 14:18:23,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-16 14:18:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:18:23,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:18:23,867 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-16 14:18:23,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-16 14:18:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:18:25,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258563612] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:18:25,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:18:25,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 22] total 55 [2022-02-16 14:18:25,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340109749] [2022-02-16 14:18:25,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:18:25,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-16 14:18:25,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:18:25,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-16 14:18:25,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=2626, Unknown=0, NotChecked=0, Total=2970 [2022-02-16 14:18:25,482 INFO L87 Difference]: Start difference. First operand 7719 states and 13668 transitions. Second operand has 55 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 55 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:18:52,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:18:52,012 INFO L93 Difference]: Finished difference Result 19076 states and 32898 transitions. [2022-02-16 14:18:52,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 399 states. [2022-02-16 14:18:52,013 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 55 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-16 14:18:52,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:18:52,033 INFO L225 Difference]: With dead ends: 19076 [2022-02-16 14:18:52,033 INFO L226 Difference]: Without dead ends: 18982 [2022-02-16 14:18:52,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 448 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90402 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=28573, Invalid=173477, Unknown=0, NotChecked=0, Total=202050 [2022-02-16 14:18:52,043 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 616 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 5195 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 5779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 5195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-16 14:18:52,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 1156 Invalid, 5779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 5195 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-16 14:18:52,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18982 states. [2022-02-16 14:18:52,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18982 to 8450. [2022-02-16 14:18:52,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 1.7778435317789087) internal successors, (15021), 8449 states have internal predecessors, (15021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:18:52,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 15021 transitions. [2022-02-16 14:18:52,176 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 15021 transitions. Word has length 43 [2022-02-16 14:18:52,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:18:52,176 INFO L470 AbstractCegarLoop]: Abstraction has 8450 states and 15021 transitions. [2022-02-16 14:18:52,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 55 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:18:52,177 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 15021 transitions. [2022-02-16 14:18:52,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-16 14:18:52,183 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:18:52,183 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:18:52,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-16 14:18:52,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-02-16 14:18:52,384 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:18:52,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:18:52,384 INFO L85 PathProgramCache]: Analyzing trace with hash -738709847, now seen corresponding path program 31 times [2022-02-16 14:18:52,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:18:52,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710599283] [2022-02-16 14:18:52,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:18:52,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:18:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:18:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-16 14:18:52,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:18:52,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710599283] [2022-02-16 14:18:52,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710599283] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:18:52,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042706111] [2022-02-16 14:18:52,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-16 14:18:52,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:18:52,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:18:52,682 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) [2022-02-16 14:18:52,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-16 14:18:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:18:52,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-16 14:18:52,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:18:53,401 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-16 14:18:53,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-16 14:18:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:18:53,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:18:54,176 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-16 14:18:54,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-16 14:18:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:18:55,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042706111] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:18:55,717 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:18:55,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 22] total 54 [2022-02-16 14:18:55,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021183255] [2022-02-16 14:18:55,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:18:55,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-16 14:18:55,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:18:55,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-16 14:18:55,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=2507, Unknown=0, NotChecked=0, Total=2862 [2022-02-16 14:18:55,718 INFO L87 Difference]: Start difference. First operand 8450 states and 15021 transitions. Second operand has 54 states, 54 states have (on average 1.962962962962963) internal successors, (106), 54 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:27,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:27,044 INFO L93 Difference]: Finished difference Result 17420 states and 29910 transitions. [2022-02-16 14:19:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 449 states. [2022-02-16 14:19:27,044 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.962962962962963) internal successors, (106), 54 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-16 14:19:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:27,066 INFO L225 Difference]: With dead ends: 17420 [2022-02-16 14:19:27,066 INFO L226 Difference]: Without dead ends: 17353 [2022-02-16 14:19:27,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 497 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112943 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=34957, Invalid=213545, Unknown=0, NotChecked=0, Total=248502 [2022-02-16 14:19:27,086 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 656 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 5699 mSolverCounterSat, 815 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 6514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 815 IncrementalHoareTripleChecker+Valid, 5699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:27,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 1284 Invalid, 6514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [815 Valid, 5699 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-16 14:19:27,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17353 states. [2022-02-16 14:19:27,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17353 to 8945. [2022-02-16 14:19:27,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8945 states, 8944 states have (on average 1.7823121645796065) internal successors, (15941), 8944 states have internal predecessors, (15941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:27,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8945 states to 8945 states and 15941 transitions. [2022-02-16 14:19:27,226 INFO L78 Accepts]: Start accepts. Automaton has 8945 states and 15941 transitions. Word has length 43 [2022-02-16 14:19:27,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:27,226 INFO L470 AbstractCegarLoop]: Abstraction has 8945 states and 15941 transitions. [2022-02-16 14:19:27,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.962962962962963) internal successors, (106), 54 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:27,226 INFO L276 IsEmpty]: Start isEmpty. Operand 8945 states and 15941 transitions. [2022-02-16 14:19:27,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-16 14:19:27,287 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:27,287 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:27,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:27,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:27,487 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:19:27,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:27,488 INFO L85 PathProgramCache]: Analyzing trace with hash -695267291, now seen corresponding path program 32 times [2022-02-16 14:19:27,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:27,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189702218] [2022-02-16 14:19:27,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:27,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:27,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:27,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189702218] [2022-02-16 14:19:27,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189702218] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:27,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046809624] [2022-02-16 14:19:27,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-16 14:19:27,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:27,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:27,873 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) [2022-02-16 14:19:27,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-16 14:19:27,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-16 14:19:27,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:27,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-16 14:19:27,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:28,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:28,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:28,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:28,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:28,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:28,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:28,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:28,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-16 14:19:28,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 22 [2022-02-16 14:19:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:28,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:29,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:29,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:29,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:29,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:29,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:29,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:29,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:29,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:29,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:29,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:29,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:29,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:29,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:29,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:29,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:29,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:29,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:29,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:19:29,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:19:29,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 127 [2022-02-16 14:19:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:30,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046809624] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:30,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:30,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-02-16 14:19:30,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225769074] [2022-02-16 14:19:30,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:30,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-16 14:19:30,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:30,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-16 14:19:30,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=524, Invalid=2782, Unknown=0, NotChecked=0, Total=3306 [2022-02-16 14:19:30,297 INFO L87 Difference]: Start difference. First operand 8945 states and 15941 transitions. Second operand has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:36,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:19:36,895 INFO L93 Difference]: Finished difference Result 12302 states and 21404 transitions. [2022-02-16 14:19:36,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-02-16 14:19:36,896 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-16 14:19:36,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:19:36,909 INFO L225 Difference]: With dead ends: 12302 [2022-02-16 14:19:36,909 INFO L226 Difference]: Without dead ends: 12273 [2022-02-16 14:19:36,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13666 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=5559, Invalid=29973, Unknown=0, NotChecked=0, Total=35532 [2022-02-16 14:19:36,914 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 608 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 3443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2184 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-16 14:19:36,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 524 Invalid, 3443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 978 Invalid, 0 Unknown, 2184 Unchecked, 0.5s Time] [2022-02-16 14:19:36,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12273 states. [2022-02-16 14:19:37,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12273 to 8953. [2022-02-16 14:19:37,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8953 states, 8952 states have (on average 1.7818364611260054) internal successors, (15951), 8952 states have internal predecessors, (15951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:37,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8953 states to 8953 states and 15951 transitions. [2022-02-16 14:19:37,034 INFO L78 Accepts]: Start accepts. Automaton has 8953 states and 15951 transitions. Word has length 43 [2022-02-16 14:19:37,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:19:37,034 INFO L470 AbstractCegarLoop]: Abstraction has 8953 states and 15951 transitions. [2022-02-16 14:19:37,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:19:37,034 INFO L276 IsEmpty]: Start isEmpty. Operand 8953 states and 15951 transitions. [2022-02-16 14:19:37,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-16 14:19:37,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:19:37,041 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:19:37,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-16 14:19:37,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:37,242 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:19:37,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:19:37,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1864432877, now seen corresponding path program 33 times [2022-02-16 14:19:37,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:19:37,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989625549] [2022-02-16 14:19:37,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:19:37,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:19:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:19:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:37,636 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:19:37,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989625549] [2022-02-16 14:19:37,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989625549] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:19:37,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641607836] [2022-02-16 14:19:37,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-16 14:19:37,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:19:37,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:19:37,639 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) [2022-02-16 14:19:37,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-16 14:19:37,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-16 14:19:37,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:19:37,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-16 14:19:37,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:19:38,414 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-16 14:19:38,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-16 14:19:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:38,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:19:39,197 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-16 14:19:39,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-16 14:19:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:19:40,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641607836] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:19:40,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:19:40,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-02-16 14:19:40,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074608188] [2022-02-16 14:19:40,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:19:40,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-16 14:19:40,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:19:40,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-16 14:19:40,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2911, Unknown=0, NotChecked=0, Total=3306 [2022-02-16 14:19:40,843 INFO L87 Difference]: Start difference. First operand 8953 states and 15951 transitions. Second operand has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:09,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:20:09,153 INFO L93 Difference]: Finished difference Result 19694 states and 33715 transitions. [2022-02-16 14:20:09,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 412 states. [2022-02-16 14:20:09,153 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-16 14:20:09,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:20:09,179 INFO L225 Difference]: With dead ends: 19694 [2022-02-16 14:20:09,179 INFO L226 Difference]: Without dead ends: 19380 [2022-02-16 14:20:09,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 464 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94679 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=30429, Invalid=186261, Unknown=0, NotChecked=0, Total=216690 [2022-02-16 14:20:09,193 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 653 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 4716 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 5342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 4716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:20:09,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 883 Invalid, 5342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 4716 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-16 14:20:09,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19380 states. [2022-02-16 14:20:09,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19380 to 9574. [2022-02-16 14:20:09,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9574 states, 9573 states have (on average 1.7804241094745639) internal successors, (17044), 9573 states have internal predecessors, (17044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:09,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9574 states to 9574 states and 17044 transitions. [2022-02-16 14:20:09,359 INFO L78 Accepts]: Start accepts. Automaton has 9574 states and 17044 transitions. Word has length 43 [2022-02-16 14:20:09,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:20:09,360 INFO L470 AbstractCegarLoop]: Abstraction has 9574 states and 17044 transitions. [2022-02-16 14:20:09,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:09,360 INFO L276 IsEmpty]: Start isEmpty. Operand 9574 states and 17044 transitions. [2022-02-16 14:20:09,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-16 14:20:09,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:20:09,366 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:20:09,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-16 14:20:09,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-16 14:20:09,567 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:20:09,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:20:09,568 INFO L85 PathProgramCache]: Analyzing trace with hash -2042919643, now seen corresponding path program 34 times [2022-02-16 14:20:09,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:20:09,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284558802] [2022-02-16 14:20:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:20:09,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:20:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:20:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:09,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:20:09,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284558802] [2022-02-16 14:20:09,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284558802] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:20:09,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567671644] [2022-02-16 14:20:09,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-16 14:20:09,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:20:09,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:20:09,975 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) [2022-02-16 14:20:09,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-16 14:20:10,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-16 14:20:10,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:20:10,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-16 14:20:10,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:20:10,796 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-16 14:20:10,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-16 14:20:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:10,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:20:11,595 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-16 14:20:11,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 53 treesize of output 177 [2022-02-16 14:20:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:13,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567671644] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:20:13,121 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:20:13,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-02-16 14:20:13,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610903999] [2022-02-16 14:20:13,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:20:13,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-16 14:20:13,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:20:13,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-16 14:20:13,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=2918, Unknown=0, NotChecked=0, Total=3306 [2022-02-16 14:20:13,123 INFO L87 Difference]: Start difference. First operand 9574 states and 17044 transitions. Second operand has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:33,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 14:20:33,918 INFO L93 Difference]: Finished difference Result 15966 states and 27607 transitions. [2022-02-16 14:20:33,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 304 states. [2022-02-16 14:20:33,918 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-16 14:20:33,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 14:20:33,937 INFO L225 Difference]: With dead ends: 15966 [2022-02-16 14:20:33,937 INFO L226 Difference]: Without dead ends: 15908 [2022-02-16 14:20:33,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51473 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=17999, Invalid=109807, Unknown=0, NotChecked=0, Total=127806 [2022-02-16 14:20:33,947 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 547 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 3710 mSolverCounterSat, 510 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 4220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 510 IncrementalHoareTripleChecker+Valid, 3710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-16 14:20:33,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 673 Invalid, 4220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [510 Valid, 3710 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-16 14:20:33,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15908 states. [2022-02-16 14:20:34,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15908 to 9654. [2022-02-16 14:20:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9654 states, 9653 states have (on average 1.7784108567284782) internal successors, (17167), 9653 states have internal predecessors, (17167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:34,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9654 states to 9654 states and 17167 transitions. [2022-02-16 14:20:34,086 INFO L78 Accepts]: Start accepts. Automaton has 9654 states and 17167 transitions. Word has length 43 [2022-02-16 14:20:34,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 14:20:34,086 INFO L470 AbstractCegarLoop]: Abstraction has 9654 states and 17167 transitions. [2022-02-16 14:20:34,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-16 14:20:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 9654 states and 17167 transitions. [2022-02-16 14:20:34,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-16 14:20:34,093 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 14:20:34,093 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-16 14:20:34,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-16 14:20:34,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-16 14:20:34,294 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-16 14:20:34,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 14:20:34,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1960767709, now seen corresponding path program 35 times [2022-02-16 14:20:34,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 14:20:34,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801846980] [2022-02-16 14:20:34,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 14:20:34,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 14:20:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 14:20:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:34,648 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 14:20:34,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801846980] [2022-02-16 14:20:34,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801846980] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-16 14:20:34,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555122453] [2022-02-16 14:20:34,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-16 14:20:34,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-16 14:20:34,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 14:20:34,649 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) [2022-02-16 14:20:34,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-16 14:20:34,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-16 14:20:34,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-16 14:20:34,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-16 14:20:34,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-16 14:20:35,410 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-16 14:20:35,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2022-02-16 14:20:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:35,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-16 14:20:36,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:36,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:36,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:36,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:36,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:36,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:36,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:36,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:36,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:36,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:36,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:36,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:36,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:36,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:36,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:36,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:36,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:36,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-16 14:20:36,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-16 14:20:36,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 135 [2022-02-16 14:20:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 14:20:36,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555122453] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-16 14:20:36,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-16 14:20:36,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 58 [2022-02-16 14:20:36,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773432900] [2022-02-16 14:20:36,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-16 14:20:36,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-16 14:20:36,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 14:20:36,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-16 14:20:36,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=2931, Unknown=0, NotChecked=0, Total=3306 [2022-02-16 14:20:36,765 INFO L87 Difference]: Start difference. First operand 9654 states and 17167 transitions. Second operand has 58 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 58 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-02-16 14:20:38,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-16 14:20:38,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2374 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1279, Invalid=7841, Unknown=0, NotChecked=0, Total=9120 [2022-02-16 14:20:38,576 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 124 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-16 14:20:38,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 27 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-16 14:20:38,577 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-02-16 14:20:38,587 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 [2022-02-16 14:20:38,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-16 14:20:38,605 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-16 14:20:38,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-16 14:20:38,788 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (9654states) and FLOYD_HOARE automaton (currently 42 states, 58 states before enhancement),while ReachableStatesComputation was computing reachable states (98 states constructed, input type IntersectNwa). [2022-02-16 14:20:38,789 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-02-16 14:20:38,790 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-02-16 14:20:38,790 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-02-16 14:20:38,791 INFO L732 BasicCegarLoop]: Path program histogram: [35, 2, 1] [2022-02-16 14:20:38,793 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-16 14:20:38,793 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-16 14:20:38,795 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.02 02:20:38 BasicIcfg [2022-02-16 14:20:38,795 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-16 14:20:38,795 INFO L158 Benchmark]: Toolchain (without parser) took 721639.13ms. Allocated memory was 185.6MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 142.8MB in the beginning and 928.0MB in the end (delta: -785.3MB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2022-02-16 14:20:38,795 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 185.6MB. Free memory is still 143.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-16 14:20:38,795 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.49ms. Allocated memory is still 185.6MB. Free memory was 142.7MB in the beginning and 141.2MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-02-16 14:20:38,795 INFO L158 Benchmark]: Boogie Preprocessor took 15.33ms. Allocated memory is still 185.6MB. Free memory was 141.2MB in the beginning and 140.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-16 14:20:38,795 INFO L158 Benchmark]: RCFGBuilder took 194.83ms. Allocated memory is still 185.6MB. Free memory was 140.1MB in the beginning and 130.9MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-16 14:20:38,796 INFO L158 Benchmark]: TraceAbstraction took 721395.92ms. Allocated memory was 185.6MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 130.4MB in the beginning and 928.0MB in the end (delta: -797.6MB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2022-02-16 14:20:38,797 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13ms. Allocated memory is still 185.6MB. Free memory is still 143.8MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 23.49ms. Allocated memory is still 185.6MB. Free memory was 142.7MB in the beginning and 141.2MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 15.33ms. Allocated memory is still 185.6MB. Free memory was 141.2MB in the beginning and 140.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 194.83ms. Allocated memory is still 185.6MB. Free memory was 140.1MB in the beginning and 130.9MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 721395.92ms. Allocated memory was 185.6MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 130.4MB in the beginning and 928.0MB in the end (delta: -797.6MB). Peak memory consumption was 1.4GB. 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: 64]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (9654states) and FLOYD_HOARE automaton (currently 42 states, 58 states before enhancement),while ReachableStatesComputation was computing reachable states (98 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (9654states) and FLOYD_HOARE automaton (currently 42 states, 58 states before enhancement),while ReachableStatesComputation was computing reachable states (98 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (9654states) and FLOYD_HOARE automaton (currently 42 states, 58 states before enhancement),while ReachableStatesComputation was computing reachable states (98 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (9654states) and FLOYD_HOARE automaton (currently 42 states, 58 states before enhancement),while ReachableStatesComputation was computing reachable states (98 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 721.3s, OverallIterations: 38, TraceHistogramMax: 4, PathProgramHistogramMax: 35, EmptinessCheckTime: 0.6s, AutomataDifference: 624.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.5s, PartialOrderReductionTime: 2.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19302 SdHoareTripleChecker+Valid, 58.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19302 mSDsluCounter, 26872 SdHoareTripleChecker+Invalid, 49.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 11043 IncrementalHoareTripleChecker+Unchecked, 36042 mSDsCounter, 18766 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 113930 IncrementalHoareTripleChecker+Invalid, 143739 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18766 mSolverCounterUnsat, 1343 mSDtfsCounter, 113930 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13279 GetRequests, 1906 SyntacticMatches, 57 SemanticMatches, 11316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2199781 ImplicationChecksByTransitivity, 582.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49040occurred in iteration=0, InterpolantAutomatonStates: 9901, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.0s AutomataMinimizationTime, 37 MinimizatonAttempts, 123472 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 81.9s InterpolantComputationTime, 2812 NumberOfCodeBlocks, 2812 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 4080 ConstructedInterpolants, 125 QuantifiedInterpolants, 62742 SizeOfPredicates, 439 NumberOfNonLiveVariables, 3366 ConjunctsInSsa, 984 ConjunctsInUnsatCore, 108 InterpolantComputations, 3 PerfectInterpolantSequences, 282/3466 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