/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 20:14:36,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 20:14:36,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 20:14:36,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 20:14:36,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-03 20:14:36,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-03 20:14:36,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-03 20:14:36,621 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-03 20:14:36,655 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 20:14:36,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 20:14:36,656 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 20:14:36,656 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 20:14:36,656 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 20:14:36,657 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 20:14:36,657 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 20:14:36,657 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 20:14:36,657 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 20:14:36,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 20:14:36,658 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 20:14:36,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 20:14:36,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 20:14:36,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 20:14:36,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 20:14:36,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 20:14:36,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 20:14:36,658 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 20:14:36,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 20:14:36,659 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 20:14:36,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 20:14:36,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 20:14:36,659 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 20:14:36,659 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 20:14:36,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 20:14:36,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 20:14:36,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 20:14:36,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 20:14:36,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 20:14:36,660 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 20:14:36,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 20:14:36,660 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 20:14:36,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 20:14:36,661 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 20:14:36,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 20:14:36,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 20:14:36,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 20:14:36,887 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 20:14:36,888 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 20:14:36,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun.wvr.bpl [2022-03-03 20:14:36,890 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun.wvr.bpl' [2022-03-03 20:14:36,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 20:14:36,917 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 20:14:36,918 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 20:14:36,918 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 20:14:36,918 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 20:14:36,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:14:36" (1/1) ... [2022-03-03 20:14:36,932 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:14:36" (1/1) ... [2022-03-03 20:14:36,938 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 20:14:36,939 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 20:14:36,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 20:14:36,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 20:14:36,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 20:14:36,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:14:36" (1/1) ... [2022-03-03 20:14:36,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:14:36" (1/1) ... [2022-03-03 20:14:36,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:14:36" (1/1) ... [2022-03-03 20:14:36,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:14:36" (1/1) ... [2022-03-03 20:14:36,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:14:36" (1/1) ... [2022-03-03 20:14:36,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:14:36" (1/1) ... [2022-03-03 20:14:36,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:14:36" (1/1) ... [2022-03-03 20:14:36,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 20:14:36,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 20:14:36,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 20:14:36,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 20:14:36,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:14:36" (1/1) ... [2022-03-03 20:14:36,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 20:14:36,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:36,986 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-03 20:14:37,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-03 20:14:37,020 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 20:14:37,020 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 20:14:37,020 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 20:14:37,021 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 20:14:37,021 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 20:14:37,021 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 20:14:37,021 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 20:14:37,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 20:14:37,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 20:14:37,021 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 20:14:37,021 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 20:14:37,022 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 20:14:37,022 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 20:14:37,065 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 20:14:37,066 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 20:14:37,192 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 20:14:37,204 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 20:14:37,204 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 20:14:37,220 INFO L202 PluginConnector]: Adding new model sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 08:14:37 BoogieIcfgContainer [2022-03-03 20:14:37,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 20:14:37,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 20:14:37,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 20:14:37,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 20:14:37,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 08:14:36" (1/2) ... [2022-03-03 20:14:37,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a7a009 and model type sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 08:14:37, skipping insertion in model container [2022-03-03 20:14:37,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 08:14:37" (2/2) ... [2022-03-03 20:14:37,240 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-fun.wvr.bpl [2022-03-03 20:14:37,244 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 20:14:37,244 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 20:14:37,245 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 20:14:37,245 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 20:14:37,294 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-03 20:14:37,328 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 20:14:37,334 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 20:14:37,334 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-03 20:14:37,342 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-03-03 20:14:37,382 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:37,385 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:37,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 20:14:37,399 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:37,400 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:14:37,400 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:37,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:37,405 INFO L85 PathProgramCache]: Analyzing trace with hash 541406590, now seen corresponding path program 1 times [2022-03-03 20:14:37,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:37,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587689076] [2022-03-03 20:14:37,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:37,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:37,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:37,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587689076] [2022-03-03 20:14:37,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587689076] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:14:37,567 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 20:14:37,568 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 20:14:37,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411584804] [2022-03-03 20:14:37,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:14:37,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 20:14:37,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:37,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 20:14:37,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-03 20:14:37,602 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:37,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:37,676 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2022-03-03 20:14:37,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 20:14:37,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 20:14:37,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:37,696 INFO L225 Difference]: With dead ends: 154 [2022-03-03 20:14:37,697 INFO L226 Difference]: Without dead ends: 154 [2022-03-03 20:14:37,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 20:14:37,701 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 77 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:37,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:14:37,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-03 20:14:37,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2022-03-03 20:14:37,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:37,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-03-03 20:14:37,772 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2022-03-03 20:14:37,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:37,773 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-03-03 20:14:37,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:37,774 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-03-03 20:14:37,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 20:14:37,775 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:37,775 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] [2022-03-03 20:14:37,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 20:14:37,776 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:37,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:37,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1033477442, now seen corresponding path program 1 times [2022-03-03 20:14:37,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:37,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850440753] [2022-03-03 20:14:37,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:37,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:14:37,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:37,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850440753] [2022-03-03 20:14:37,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850440753] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 20:14:37,825 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 20:14:37,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 20:14:37,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977430873] [2022-03-03 20:14:37,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 20:14:37,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 20:14:37,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:37,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 20:14:37,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 20:14:37,828 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:37,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:37,872 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2022-03-03 20:14:37,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 20:14:37,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 20:14:37,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:37,874 INFO L225 Difference]: With dead ends: 158 [2022-03-03 20:14:37,874 INFO L226 Difference]: Without dead ends: 158 [2022-03-03 20:14:37,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 20:14:37,876 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:37,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 20:14:37,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-03 20:14:37,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-03-03 20:14:37,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:37,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-03-03 20:14:37,891 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-03-03 20:14:37,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:37,891 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-03-03 20:14:37,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:37,892 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-03-03 20:14:37,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:14:37,893 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:37,894 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] [2022-03-03 20:14:37,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 20:14:37,894 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:37,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:37,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1959936804, now seen corresponding path program 1 times [2022-03-03 20:14:37,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:37,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203574791] [2022-03-03 20:14:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:37,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:38,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:38,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203574791] [2022-03-03 20:14:38,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203574791] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:38,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234450244] [2022-03-03 20:14:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:38,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:38,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:38,326 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:38,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 20:14:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:38,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 20:14:38,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:38,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:14:38,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-03 20:14:38,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:38,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:38,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:38,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-03 20:14:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:39,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234450244] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:39,109 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:39,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:14:39,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679969658] [2022-03-03 20:14:39,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:39,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 20:14:39,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:39,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 20:14:39,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-03-03 20:14:39,113 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:39,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:39,454 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-03-03 20:14:39,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 20:14:39,455 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 20:14:39,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:39,458 INFO L225 Difference]: With dead ends: 366 [2022-03-03 20:14:39,458 INFO L226 Difference]: Without dead ends: 351 [2022-03-03 20:14:39,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:14:39,459 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 192 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:39,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 84 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 243 Invalid, 0 Unknown, 108 Unchecked, 0.2s Time] [2022-03-03 20:14:39,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-03-03 20:14:39,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-03-03 20:14:39,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:39,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-03-03 20:14:39,475 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-03-03 20:14:39,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:39,475 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-03-03 20:14:39,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:39,475 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-03-03 20:14:39,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:14:39,477 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:39,477 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] [2022-03-03 20:14:39,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:39,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:39,700 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:39,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:39,701 INFO L85 PathProgramCache]: Analyzing trace with hash -2127745896, now seen corresponding path program 2 times [2022-03-03 20:14:39,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:39,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309348395] [2022-03-03 20:14:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:39,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:39,934 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:39,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309348395] [2022-03-03 20:14:39,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309348395] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:39,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497766207] [2022-03-03 20:14:39,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:14:39,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:39,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:39,936 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:39,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 20:14:39,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:14:39,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:39,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 20:14:39,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:40,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:40,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-03-03 20:14:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:40,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:40,402 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:40,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-03 20:14:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:40,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497766207] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:40,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:40,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-03-03 20:14:40,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449240753] [2022-03-03 20:14:40,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:40,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 20:14:40,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:40,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 20:14:40,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-03-03 20:14:40,521 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-03-03 20:14:41,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:41,209 INFO L93 Difference]: Finished difference Result 478 states and 1385 transitions. [2022-03-03 20:14:41,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 20:14:41,209 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 22 [2022-03-03 20:14:41,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:41,212 INFO L225 Difference]: With dead ends: 478 [2022-03-03 20:14:41,212 INFO L226 Difference]: Without dead ends: 463 [2022-03-03 20:14:41,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2022-03-03 20:14:41,214 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 155 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:41,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 110 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 390 Invalid, 0 Unknown, 128 Unchecked, 0.3s Time] [2022-03-03 20:14:41,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-03-03 20:14:41,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 229. [2022-03-03 20:14:41,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-03-03 20:14:41,226 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-03-03 20:14:41,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:41,226 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-03-03 20:14:41,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-03-03 20:14:41,227 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-03-03 20:14:41,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:14:41,228 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:41,228 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] [2022-03-03 20:14:41,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:41,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-03 20:14:41,444 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:41,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:41,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1828972448, now seen corresponding path program 3 times [2022-03-03 20:14:41,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:41,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307112640] [2022-03-03 20:14:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:41,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:41,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:41,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307112640] [2022-03-03 20:14:41,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307112640] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:41,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59450061] [2022-03-03 20:14:41,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:14:41,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:41,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:41,614 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:41,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 20:14:41,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 20:14:41,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:41,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 20:14:41,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:41,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-03 20:14:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:41,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:41,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:41,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-03 20:14:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:42,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59450061] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:42,067 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:42,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-03 20:14:42,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118569149] [2022-03-03 20:14:42,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:42,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:14:42,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:42,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:14:42,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:14:42,069 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:42,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:42,305 INFO L93 Difference]: Finished difference Result 378 states and 1075 transitions. [2022-03-03 20:14:42,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 20:14:42,305 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 20:14:42,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:42,308 INFO L225 Difference]: With dead ends: 378 [2022-03-03 20:14:42,308 INFO L226 Difference]: Without dead ends: 363 [2022-03-03 20:14:42,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-03-03 20:14:42,309 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 69 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:42,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 141 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 261 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2022-03-03 20:14:42,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-03-03 20:14:42,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 241. [2022-03-03 20:14:42,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:42,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-03-03 20:14:42,321 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-03-03 20:14:42,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:42,321 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-03-03 20:14:42,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:42,321 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-03-03 20:14:42,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:14:42,322 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:42,322 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] [2022-03-03 20:14:42,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-03 20:14:42,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:42,546 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:42,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:42,546 INFO L85 PathProgramCache]: Analyzing trace with hash -258146848, now seen corresponding path program 4 times [2022-03-03 20:14:42,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:42,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243973238] [2022-03-03 20:14:42,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:42,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:42,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:42,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243973238] [2022-03-03 20:14:42,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243973238] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:42,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046497453] [2022-03-03 20:14:42,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:14:42,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:42,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:42,720 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:42,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 20:14:42,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:14:42,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:42,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 20:14:42,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:42,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:42,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-03 20:14:43,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:43,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:43,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:43,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-03 20:14:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:43,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046497453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:43,263 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:43,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:14:43,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723406131] [2022-03-03 20:14:43,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:43,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 20:14:43,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:43,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 20:14:43,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-03-03 20:14:43,265 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:43,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:43,511 INFO L93 Difference]: Finished difference Result 381 states and 1109 transitions. [2022-03-03 20:14:43,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 20:14:43,512 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 20:14:43,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:43,514 INFO L225 Difference]: With dead ends: 381 [2022-03-03 20:14:43,514 INFO L226 Difference]: Without dead ends: 366 [2022-03-03 20:14:43,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:14:43,516 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:43,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 110 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 209 Invalid, 0 Unknown, 140 Unchecked, 0.1s Time] [2022-03-03 20:14:43,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-03-03 20:14:43,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 250. [2022-03-03 20:14:43,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.9437751004016066) internal successors, (733), 249 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:43,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 733 transitions. [2022-03-03 20:14:43,529 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 733 transitions. Word has length 22 [2022-03-03 20:14:43,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:43,529 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 733 transitions. [2022-03-03 20:14:43,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 733 transitions. [2022-03-03 20:14:43,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:14:43,530 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:43,530 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] [2022-03-03 20:14:43,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:43,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:43,754 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:43,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:43,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1789401154, now seen corresponding path program 5 times [2022-03-03 20:14:43,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:43,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781970255] [2022-03-03 20:14:43,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:43,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:43,912 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:43,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781970255] [2022-03-03 20:14:43,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781970255] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:43,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661988461] [2022-03-03 20:14:43,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:14:43,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:43,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:43,913 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:43,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 20:14:43,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:14:43,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:43,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 20:14:43,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:44,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:44,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-03-03 20:14:44,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:44,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:44,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:44,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-03 20:14:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:44,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661988461] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:44,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:44,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-03 20:14:44,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861128749] [2022-03-03 20:14:44,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:44,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:14:44,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:44,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:14:44,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:14:44,407 INFO L87 Difference]: Start difference. First operand 250 states and 733 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:45,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:45,097 INFO L93 Difference]: Finished difference Result 654 states and 1825 transitions. [2022-03-03 20:14:45,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 20:14:45,098 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 20:14:45,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:45,101 INFO L225 Difference]: With dead ends: 654 [2022-03-03 20:14:45,101 INFO L226 Difference]: Without dead ends: 625 [2022-03-03 20:14:45,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=790, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 20:14:45,102 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 173 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:45,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 215 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 344 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-03-03 20:14:45,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-03-03 20:14:45,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 253. [2022-03-03 20:14:45,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.9404761904761907) internal successors, (741), 252 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:45,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 741 transitions. [2022-03-03 20:14:45,112 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 741 transitions. Word has length 22 [2022-03-03 20:14:45,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:45,112 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 741 transitions. [2022-03-03 20:14:45,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:45,112 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 741 transitions. [2022-03-03 20:14:45,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 20:14:45,113 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:45,113 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] [2022-03-03 20:14:45,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-03 20:14:45,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:45,327 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:45,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:45,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1022431204, now seen corresponding path program 6 times [2022-03-03 20:14:45,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:45,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814492233] [2022-03-03 20:14:45,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:45,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:45,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:45,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814492233] [2022-03-03 20:14:45,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814492233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:45,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416046892] [2022-03-03 20:14:45,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:14:45,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:45,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:45,478 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:45,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 20:14:45,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 20:14:45,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:45,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 20:14:45,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:45,707 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 20:14:45,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 38 [2022-03-03 20:14:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:45,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:45,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:14:45,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-03 20:14:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:45,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416046892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:45,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:45,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-03 20:14:45,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616940388] [2022-03-03 20:14:45,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:45,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:14:45,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:45,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:14:45,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:14:45,948 INFO L87 Difference]: Start difference. First operand 253 states and 741 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:46,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:46,346 INFO L93 Difference]: Finished difference Result 465 states and 1325 transitions. [2022-03-03 20:14:46,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 20:14:46,347 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 20:14:46,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:46,349 INFO L225 Difference]: With dead ends: 465 [2022-03-03 20:14:46,349 INFO L226 Difference]: Without dead ends: 450 [2022-03-03 20:14:46,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:14:46,350 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 83 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:46,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 195 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 368 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-03-03 20:14:46,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-03-03 20:14:46,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 247. [2022-03-03 20:14:46,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:46,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2022-03-03 20:14:46,358 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2022-03-03 20:14:46,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:46,358 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2022-03-03 20:14:46,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:46,358 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2022-03-03 20:14:46,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:14:46,359 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:46,359 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:14:46,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:46,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:46,576 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:46,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:46,576 INFO L85 PathProgramCache]: Analyzing trace with hash 976010682, now seen corresponding path program 7 times [2022-03-03 20:14:46,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:46,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85633147] [2022-03-03 20:14:46,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:46,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:46,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:46,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:46,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85633147] [2022-03-03 20:14:46,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85633147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:46,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708698483] [2022-03-03 20:14:46,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:14:46,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:46,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:46,628 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:46,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 20:14:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:46,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:14:46,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:46,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:46,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708698483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:46,876 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:46,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 20:14:46,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836290243] [2022-03-03 20:14:46,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:46,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:14:46,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:46,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:14:46,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:14:46,877 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:47,752 INFO L93 Difference]: Finished difference Result 1099 states and 3110 transitions. [2022-03-03 20:14:47,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 20:14:47,752 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:14:47,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:47,758 INFO L225 Difference]: With dead ends: 1099 [2022-03-03 20:14:47,758 INFO L226 Difference]: Without dead ends: 1099 [2022-03-03 20:14:47,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 20:14:47,759 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 265 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:47,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 216 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:14:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-03-03 20:14:47,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 311. [2022-03-03 20:14:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.141935483870968) internal successors, (974), 310 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 974 transitions. [2022-03-03 20:14:47,773 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 974 transitions. Word has length 24 [2022-03-03 20:14:47,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:47,773 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 974 transitions. [2022-03-03 20:14:47,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:47,773 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 974 transitions. [2022-03-03 20:14:47,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:14:47,774 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:47,774 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:14:47,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:47,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:47,987 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:47,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:47,988 INFO L85 PathProgramCache]: Analyzing trace with hash -308162, now seen corresponding path program 8 times [2022-03-03 20:14:47,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:47,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816307909] [2022-03-03 20:14:47,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:47,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:48,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:48,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816307909] [2022-03-03 20:14:48,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816307909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:48,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842043451] [2022-03-03 20:14:48,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:14:48,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:48,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:48,060 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:48,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 20:14:48,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:14:48,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:48,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:14:48,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:48,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:48,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:48,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842043451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:48,308 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:48,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:14:48,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15794293] [2022-03-03 20:14:48,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:48,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:14:48,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:48,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:14:48,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:14:48,310 INFO L87 Difference]: Start difference. First operand 311 states and 974 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:50,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:50,151 INFO L93 Difference]: Finished difference Result 1794 states and 5013 transitions. [2022-03-03 20:14:50,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-03 20:14:50,151 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:14:50,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:50,160 INFO L225 Difference]: With dead ends: 1794 [2022-03-03 20:14:50,160 INFO L226 Difference]: Without dead ends: 1794 [2022-03-03 20:14:50,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-03-03 20:14:50,164 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 501 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:50,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 273 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:14:50,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-03-03 20:14:50,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 315. [2022-03-03 20:14:50,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1656050955414012) internal successors, (994), 314 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:50,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-03-03 20:14:50,185 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-03-03 20:14:50,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:50,185 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-03-03 20:14:50,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:50,185 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-03-03 20:14:50,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:14:50,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:50,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:14:50,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:50,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-03 20:14:50,399 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:50,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:50,400 INFO L85 PathProgramCache]: Analyzing trace with hash 566643918, now seen corresponding path program 9 times [2022-03-03 20:14:50,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:50,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069131048] [2022-03-03 20:14:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:50,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:50,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:50,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:50,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069131048] [2022-03-03 20:14:50,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069131048] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:50,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898029980] [2022-03-03 20:14:50,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:14:50,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:50,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:50,472 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:50,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 20:14:50,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:14:50,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:50,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:14:50,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:50,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:50,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898029980] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:50,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:50,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:14:50,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631114205] [2022-03-03 20:14:50,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:50,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:14:50,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:50,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:14:50,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:14:50,735 INFO L87 Difference]: Start difference. First operand 315 states and 994 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:51,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:51,658 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-03-03 20:14:51,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 20:14:51,658 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:14:51,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:51,665 INFO L225 Difference]: With dead ends: 1470 [2022-03-03 20:14:51,665 INFO L226 Difference]: Without dead ends: 1470 [2022-03-03 20:14:51,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-03-03 20:14:51,667 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 373 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:51,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 231 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:14:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-03-03 20:14:51,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-03-03 20:14:51,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1475409836065573) internal successors, (960), 305 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:51,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-03-03 20:14:51,685 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-03-03 20:14:51,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:51,685 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-03-03 20:14:51,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:51,685 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-03-03 20:14:51,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:14:51,687 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:51,687 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] [2022-03-03 20:14:51,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:51,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:51,911 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:51,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:51,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1502782590, now seen corresponding path program 1 times [2022-03-03 20:14:51,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:51,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513311177] [2022-03-03 20:14:51,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:51,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:51,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:14:51,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:51,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513311177] [2022-03-03 20:14:51,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513311177] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:51,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580883205] [2022-03-03 20:14:51,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:51,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:51,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:51,947 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:51,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 20:14:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:51,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:14:51,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:14:52,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:14:52,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580883205] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:52,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:52,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 20:14:52,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245409257] [2022-03-03 20:14:52,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:52,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 20:14:52,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:52,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 20:14:52,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:14:52,126 INFO L87 Difference]: Start difference. First operand 306 states and 960 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:52,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:52,263 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-03-03 20:14:52,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 20:14:52,263 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 24 [2022-03-03 20:14:52,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:52,266 INFO L225 Difference]: With dead ends: 685 [2022-03-03 20:14:52,266 INFO L226 Difference]: Without dead ends: 679 [2022-03-03 20:14:52,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:14:52,267 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 153 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:52,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 40 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:14:52,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-03-03 20:14:52,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-03-03 20:14:52,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2406542056074765) internal successors, (1387), 428 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:52,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-03-03 20:14:52,280 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-03-03 20:14:52,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:52,280 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-03-03 20:14:52,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:52,280 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-03-03 20:14:52,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:14:52,281 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:52,281 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:14:52,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:52,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-03 20:14:52,499 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:52,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:52,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1065813882, now seen corresponding path program 10 times [2022-03-03 20:14:52,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:52,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225674248] [2022-03-03 20:14:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:52,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:52,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:52,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225674248] [2022-03-03 20:14:52,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225674248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:52,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211932732] [2022-03-03 20:14:52,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:14:52,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:52,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:52,560 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:52,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 20:14:52,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:14:52,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:52,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:14:52,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:52,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:52,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211932732] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:52,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:52,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-03 20:14:52,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522227055] [2022-03-03 20:14:52,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:52,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:14:52,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:52,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:14:52,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:14:52,760 INFO L87 Difference]: Start difference. First operand 429 states and 1387 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:53,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:53,102 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-03-03 20:14:53,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 20:14:53,102 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:14:53,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:53,106 INFO L225 Difference]: With dead ends: 1159 [2022-03-03 20:14:53,106 INFO L226 Difference]: Without dead ends: 1111 [2022-03-03 20:14:53,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-03-03 20:14:53,107 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 288 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:53,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 108 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:14:53,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-03-03 20:14:53,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-03-03 20:14:53,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.3448275862068964) internal successors, (2134), 638 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:53,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-03-03 20:14:53,140 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-03-03 20:14:53,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:53,140 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-03-03 20:14:53,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:53,140 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-03-03 20:14:53,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:14:53,142 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:53,142 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] [2022-03-03 20:14:53,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:53,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-03 20:14:53,359 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:53,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:53,360 INFO L85 PathProgramCache]: Analyzing trace with hash 359856550, now seen corresponding path program 2 times [2022-03-03 20:14:53,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:53,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576523701] [2022-03-03 20:14:53,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:53,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:14:53,390 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:53,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576523701] [2022-03-03 20:14:53,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576523701] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:53,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073840641] [2022-03-03 20:14:53,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:14:53,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:53,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:53,391 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:53,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 20:14:53,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:14:53,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:53,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:14:53,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:14:53,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:53,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:14:53,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073840641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:53,594 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:53,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 20:14:53,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105117252] [2022-03-03 20:14:53,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:53,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 20:14:53,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:53,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 20:14:53,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:14:53,595 INFO L87 Difference]: Start difference. First operand 639 states and 2134 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:53,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:53,801 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-03-03 20:14:53,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 20:14:53,801 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 24 [2022-03-03 20:14:53,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:53,806 INFO L225 Difference]: With dead ends: 1267 [2022-03-03 20:14:53,806 INFO L226 Difference]: Without dead ends: 1267 [2022-03-03 20:14:53,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-03-03 20:14:53,807 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 173 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:53,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 66 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:14:53,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-03-03 20:14:53,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-03-03 20:14:53,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.3167155425219943) internal successors, (2262), 682 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:53,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-03-03 20:14:53,829 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-03-03 20:14:53,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:53,829 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-03-03 20:14:53,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:53,829 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-03-03 20:14:53,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:14:53,831 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:53,831 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:14:53,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:54,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-03 20:14:54,054 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:54,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:54,055 INFO L85 PathProgramCache]: Analyzing trace with hash -986825016, now seen corresponding path program 11 times [2022-03-03 20:14:54,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:54,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34107988] [2022-03-03 20:14:54,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:54,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:54,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:54,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34107988] [2022-03-03 20:14:54,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34107988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:54,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107881543] [2022-03-03 20:14:54,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:14:54,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:54,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:54,104 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:54,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 20:14:54,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:14:54,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:54,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:14:54,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:54,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:54,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107881543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:54,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:54,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:14:54,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873788964] [2022-03-03 20:14:54,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:54,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:14:54,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:54,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:14:54,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:14:54,294 INFO L87 Difference]: Start difference. First operand 683 states and 2262 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:54,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:54,837 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-03-03 20:14:54,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 20:14:54,838 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:14:54,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:54,847 INFO L225 Difference]: With dead ends: 2268 [2022-03-03 20:14:54,847 INFO L226 Difference]: Without dead ends: 2268 [2022-03-03 20:14:54,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 20:14:54,848 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 273 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:54,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 168 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:14:54,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-03-03 20:14:54,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-03-03 20:14:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.312320916905444) internal successors, (2312), 698 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:54,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-03-03 20:14:54,899 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-03-03 20:14:54,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:54,900 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-03-03 20:14:54,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:54,900 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-03-03 20:14:54,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:14:54,902 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:54,902 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:14:54,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:55,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-03 20:14:55,115 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:55,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:55,116 INFO L85 PathProgramCache]: Analyzing trace with hash -201910922, now seen corresponding path program 12 times [2022-03-03 20:14:55,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:55,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817904799] [2022-03-03 20:14:55,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:55,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:55,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:55,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:55,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817904799] [2022-03-03 20:14:55,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817904799] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:55,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049954068] [2022-03-03 20:14:55,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:14:55,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:55,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:55,168 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:55,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 20:14:55,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 20:14:55,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:55,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:14:55,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:55,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:55,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049954068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:55,362 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:55,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:14:55,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086940404] [2022-03-03 20:14:55,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:55,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:14:55,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:55,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:14:55,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:14:55,363 INFO L87 Difference]: Start difference. First operand 699 states and 2312 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:56,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:56,013 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-03-03 20:14:56,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 20:14:56,013 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:14:56,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:56,024 INFO L225 Difference]: With dead ends: 2256 [2022-03-03 20:14:56,024 INFO L226 Difference]: Without dead ends: 2256 [2022-03-03 20:14:56,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 20:14:56,026 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 296 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:56,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 159 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:14:56,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-03-03 20:14:56,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-03-03 20:14:56,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.289405684754522) internal successors, (2546), 774 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:56,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-03-03 20:14:56,065 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-03-03 20:14:56,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:56,066 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-03-03 20:14:56,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:56,067 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-03-03 20:14:56,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:14:56,070 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:56,070 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:14:56,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:56,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:56,283 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:56,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:56,284 INFO L85 PathProgramCache]: Analyzing trace with hash 186144540, now seen corresponding path program 13 times [2022-03-03 20:14:56,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:56,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593018777] [2022-03-03 20:14:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:56,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:56,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:56,331 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:56,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593018777] [2022-03-03 20:14:56,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593018777] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:56,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243470031] [2022-03-03 20:14:56,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:14:56,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:56,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:56,333 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:56,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 20:14:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:56,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:14:56,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:56,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:56,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243470031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:56,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:56,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-03 20:14:56,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285116885] [2022-03-03 20:14:56,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:56,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:14:56,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:56,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:14:56,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:14:56,490 INFO L87 Difference]: Start difference. First operand 775 states and 2546 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:56,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:56,772 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-03-03 20:14:56,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 20:14:56,772 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:14:56,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:56,780 INFO L225 Difference]: With dead ends: 1611 [2022-03-03 20:14:56,780 INFO L226 Difference]: Without dead ends: 1611 [2022-03-03 20:14:56,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:14:56,781 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 222 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:56,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 118 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:14:56,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-03-03 20:14:56,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-03-03 20:14:56,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.370810810810811) internal successors, (3118), 925 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:56,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-03-03 20:14:56,811 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-03-03 20:14:56,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:56,811 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-03-03 20:14:56,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:56,811 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-03-03 20:14:56,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:14:56,813 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:56,813 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:14:56,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:57,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-03 20:14:57,027 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:57,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:57,028 INFO L85 PathProgramCache]: Analyzing trace with hash -246732064, now seen corresponding path program 14 times [2022-03-03 20:14:57,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:57,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292040548] [2022-03-03 20:14:57,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:57,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:57,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:57,071 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:57,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292040548] [2022-03-03 20:14:57,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292040548] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:57,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809533215] [2022-03-03 20:14:57,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:14:57,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:57,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:57,073 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:57,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 20:14:57,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:14:57,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:57,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:14:57,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:57,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:57,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809533215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:57,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:57,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:14:57,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357420534] [2022-03-03 20:14:57,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:57,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:14:57,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:57,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:14:57,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:14:57,247 INFO L87 Difference]: Start difference. First operand 926 states and 3118 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:57,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:57,774 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-03-03 20:14:57,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 20:14:57,775 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:14:57,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:57,784 INFO L225 Difference]: With dead ends: 2408 [2022-03-03 20:14:57,784 INFO L226 Difference]: Without dead ends: 2404 [2022-03-03 20:14:57,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 20:14:57,785 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 307 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:57,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 147 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:14:57,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-03-03 20:14:57,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-03-03 20:14:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.356913183279743) internal successors, (3132), 933 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-03-03 20:14:57,821 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-03-03 20:14:57,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:57,821 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-03-03 20:14:57,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:57,821 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-03-03 20:14:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:14:57,824 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:57,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:14:57,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:58,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-03 20:14:58,039 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:58,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:58,040 INFO L85 PathProgramCache]: Analyzing trace with hash -112101728, now seen corresponding path program 15 times [2022-03-03 20:14:58,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:58,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564135736] [2022-03-03 20:14:58,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:58,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:58,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:58,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564135736] [2022-03-03 20:14:58,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564135736] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:58,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644752815] [2022-03-03 20:14:58,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:14:58,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:58,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:58,092 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:58,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 20:14:58,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:14:58,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:58,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:14:58,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:58,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:58,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644752815] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:58,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:58,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:14:58,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371648169] [2022-03-03 20:14:58,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:58,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:14:58,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:58,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:14:58,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:14:58,293 INFO L87 Difference]: Start difference. First operand 934 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:59,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:14:59,320 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-03-03 20:14:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 20:14:59,320 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:14:59,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:14:59,330 INFO L225 Difference]: With dead ends: 3509 [2022-03-03 20:14:59,330 INFO L226 Difference]: Without dead ends: 3509 [2022-03-03 20:14:59,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 20:14:59,333 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 470 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:14:59,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 268 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:14:59,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-03-03 20:14:59,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-03-03 20:14:59,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.399390243902439) internal successors, (3345), 984 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:59,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-03-03 20:14:59,380 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-03-03 20:14:59,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:14:59,381 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-03-03 20:14:59,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:14:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-03-03 20:14:59,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:14:59,383 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:14:59,383 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:14:59,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 20:14:59,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:59,598 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:14:59,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:14:59,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1530937426, now seen corresponding path program 16 times [2022-03-03 20:14:59,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:14:59,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981981777] [2022-03-03 20:14:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:14:59,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:14:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:14:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:59,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:14:59,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981981777] [2022-03-03 20:14:59,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981981777] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:14:59,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479185667] [2022-03-03 20:14:59,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:14:59,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:14:59,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:14:59,643 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:14:59,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 20:14:59,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:14:59,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:14:59,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:14:59,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:14:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:59,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:14:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:14:59,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479185667] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:14:59,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:14:59,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:14:59,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907364141] [2022-03-03 20:14:59,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:14:59,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:14:59,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:14:59,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:14:59,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:14:59,839 INFO L87 Difference]: Start difference. First operand 985 states and 3345 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:01,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:01,085 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-03-03 20:15:01,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-03 20:15:01,085 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:15:01,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:01,093 INFO L225 Difference]: With dead ends: 3211 [2022-03-03 20:15:01,094 INFO L226 Difference]: Without dead ends: 3207 [2022-03-03 20:15:01,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-03-03 20:15:01,096 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 495 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:01,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 270 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:15:01,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-03-03 20:15:01,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-03-03 20:15:01,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.397357723577236) internal successors, (3343), 984 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:01,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-03-03 20:15:01,139 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-03-03 20:15:01,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:01,139 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-03-03 20:15:01,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:01,139 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-03-03 20:15:01,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:15:01,142 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:01,142 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] [2022-03-03 20:15:01,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:01,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:01,355 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:01,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:01,356 INFO L85 PathProgramCache]: Analyzing trace with hash 618651874, now seen corresponding path program 3 times [2022-03-03 20:15:01,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:01,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666646054] [2022-03-03 20:15:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:01,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:15:01,390 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:01,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666646054] [2022-03-03 20:15:01,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666646054] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:01,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992688988] [2022-03-03 20:15:01,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:15:01,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:01,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:01,391 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:01,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 20:15:01,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 20:15:01,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:01,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 20:15:01,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:15:01,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:01,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:15:01,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992688988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:01,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:01,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-03-03 20:15:01,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021164317] [2022-03-03 20:15:01,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:01,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 20:15:01,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:01,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 20:15:01,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-03 20:15:01,528 INFO L87 Difference]: Start difference. First operand 985 states and 3343 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:01,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:01,655 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-03-03 20:15:01,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 20:15:01,656 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:15:01,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:01,659 INFO L225 Difference]: With dead ends: 1333 [2022-03-03 20:15:01,659 INFO L226 Difference]: Without dead ends: 1333 [2022-03-03 20:15:01,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:15:01,659 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:01,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 51 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:15:01,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-03-03 20:15:01,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-03-03 20:15:01,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.378205128205128) internal successors, (3162), 936 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:01,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-03-03 20:15:01,683 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-03-03 20:15:01,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:01,683 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-03-03 20:15:01,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:01,684 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-03-03 20:15:01,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:15:01,686 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:01,686 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:01,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:01,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:01,909 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:01,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:01,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1548851618, now seen corresponding path program 17 times [2022-03-03 20:15:01,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:01,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489659143] [2022-03-03 20:15:01,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:01,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:01,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:01,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489659143] [2022-03-03 20:15:01,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489659143] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:01,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099631653] [2022-03-03 20:15:01,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:15:01,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:01,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:01,952 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:01,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 20:15:01,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:15:01,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:01,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:15:01,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:02,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:02,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099631653] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:02,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:02,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-03 20:15:02,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972691010] [2022-03-03 20:15:02,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:02,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:15:02,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:02,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:15:02,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:15:02,099 INFO L87 Difference]: Start difference. First operand 937 states and 3162 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:02,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:02,457 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-03-03 20:15:02,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 20:15:02,458 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:15:02,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:02,463 INFO L225 Difference]: With dead ends: 2129 [2022-03-03 20:15:02,463 INFO L226 Difference]: Without dead ends: 2129 [2022-03-03 20:15:02,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 20:15:02,464 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 176 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:02,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 140 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:15:02,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-03-03 20:15:02,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-03-03 20:15:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 3.3642714570858283) internal successors, (3371), 1002 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:02,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-03-03 20:15:02,496 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-03-03 20:15:02,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:02,497 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-03-03 20:15:02,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:02,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-03-03 20:15:02,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:15:02,500 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:02,500 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:02,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:02,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-03 20:15:02,720 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:02,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:02,720 INFO L85 PathProgramCache]: Analyzing trace with hash -843436226, now seen corresponding path program 18 times [2022-03-03 20:15:02,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:02,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825598620] [2022-03-03 20:15:02,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:02,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:02,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:02,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825598620] [2022-03-03 20:15:02,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825598620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:02,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410036694] [2022-03-03 20:15:02,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:15:02,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:02,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:02,761 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:02,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 20:15:02,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:15:02,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:02,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:15:02,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:02,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:02,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410036694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:02,910 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:02,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 20:15:02,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933392119] [2022-03-03 20:15:02,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:02,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 20:15:02,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:02,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 20:15:02,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:15:02,911 INFO L87 Difference]: Start difference. First operand 1003 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:03,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:03,255 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-03-03 20:15:03,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 20:15:03,259 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:15:03,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:03,267 INFO L225 Difference]: With dead ends: 2262 [2022-03-03 20:15:03,267 INFO L226 Difference]: Without dead ends: 2262 [2022-03-03 20:15:03,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 20:15:03,268 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 163 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:03,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 127 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:15:03,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-03-03 20:15:03,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-03-03 20:15:03,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.3563432835820897) internal successors, (3598), 1072 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:03,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-03-03 20:15:03,305 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-03-03 20:15:03,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:03,306 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-03-03 20:15:03,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:03,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-03-03 20:15:03,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:15:03,308 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:03,309 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:03,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:03,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-03 20:15:03,531 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:03,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:03,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1926458882, now seen corresponding path program 19 times [2022-03-03 20:15:03,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:03,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584629621] [2022-03-03 20:15:03,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:03,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:03,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:03,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:03,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584629621] [2022-03-03 20:15:03,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584629621] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:03,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239607655] [2022-03-03 20:15:03,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:15:03,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:03,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:03,577 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:03,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 20:15:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:03,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:15:03,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:03,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:15:03,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239607655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:03,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:03,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-03-03 20:15:03,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992663490] [2022-03-03 20:15:03,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:03,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:15:03,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:03,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:15:03,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:15:03,759 INFO L87 Difference]: Start difference. First operand 1073 states and 3598 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:04,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:04,026 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-03-03 20:15:04,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 20:15:04,026 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:15:04,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:04,029 INFO L225 Difference]: With dead ends: 1474 [2022-03-03 20:15:04,029 INFO L226 Difference]: Without dead ends: 1464 [2022-03-03 20:15:04,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:15:04,030 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 135 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:04,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 116 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:15:04,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-03-03 20:15:04,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-03-03 20:15:04,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.395961369622476) internal successors, (3868), 1139 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:04,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-03-03 20:15:04,051 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-03-03 20:15:04,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:04,052 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-03-03 20:15:04,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:04,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-03-03 20:15:04,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:15:04,055 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:04,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:04,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:04,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:04,269 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:04,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:04,269 INFO L85 PathProgramCache]: Analyzing trace with hash -888257368, now seen corresponding path program 20 times [2022-03-03 20:15:04,269 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:04,269 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213005468] [2022-03-03 20:15:04,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:04,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:15:04,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:04,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213005468] [2022-03-03 20:15:04,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213005468] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:04,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687278724] [2022-03-03 20:15:04,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:15:04,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:04,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:04,305 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:04,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 20:15:04,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:15:04,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:04,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:15:04,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:15:04,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:15:04,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687278724] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:04,428 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:04,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 20:15:04,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031465511] [2022-03-03 20:15:04,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:04,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 20:15:04,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:04,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 20:15:04,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-03 20:15:04,429 INFO L87 Difference]: Start difference. First operand 1140 states and 3868 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:04,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:04,695 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-03-03 20:15:04,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 20:15:04,696 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:15:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:04,700 INFO L225 Difference]: With dead ends: 2318 [2022-03-03 20:15:04,700 INFO L226 Difference]: Without dead ends: 2314 [2022-03-03 20:15:04,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:15:04,704 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 179 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:04,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 100 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:15:04,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-03-03 20:15:04,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-03-03 20:15:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.394205443371378) internal successors, (3866), 1139 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:04,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-03-03 20:15:04,768 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-03-03 20:15:04,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:04,768 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-03-03 20:15:04,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:04,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-03-03 20:15:04,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:15:04,771 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:04,771 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:04,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:04,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:04,992 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:04,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:04,992 INFO L85 PathProgramCache]: Analyzing trace with hash -290920710, now seen corresponding path program 21 times [2022-03-03 20:15:04,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:04,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776885377] [2022-03-03 20:15:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:04,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:05,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:05,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:05,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776885377] [2022-03-03 20:15:05,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776885377] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:05,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948059396] [2022-03-03 20:15:05,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:15:05,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:05,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:05,038 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:05,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 20:15:05,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:15:05,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:05,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:15:05,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:05,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:05,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948059396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:05,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:05,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-03 20:15:05,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972293967] [2022-03-03 20:15:05,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:05,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 20:15:05,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:05,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 20:15:05,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-03 20:15:05,165 INFO L87 Difference]: Start difference. First operand 1140 states and 3866 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:05,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:05,464 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-03-03 20:15:05,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 20:15:05,465 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:15:05,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:05,469 INFO L225 Difference]: With dead ends: 2302 [2022-03-03 20:15:05,469 INFO L226 Difference]: Without dead ends: 2290 [2022-03-03 20:15:05,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-03-03 20:15:05,470 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 230 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:05,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 119 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:15:05,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-03-03 20:15:05,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-03-03 20:15:05,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.3844812554489976) internal successors, (3882), 1147 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-03-03 20:15:05,521 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-03-03 20:15:05,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:05,521 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-03-03 20:15:05,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:05,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-03-03 20:15:05,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:15:05,523 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:05,524 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:05,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-03 20:15:05,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-03 20:15:05,743 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:05,744 INFO L85 PathProgramCache]: Analyzing trace with hash -817340994, now seen corresponding path program 22 times [2022-03-03 20:15:05,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:05,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274912955] [2022-03-03 20:15:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:05,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:05,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:05,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274912955] [2022-03-03 20:15:05,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274912955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:05,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925993204] [2022-03-03 20:15:05,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:15:05,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:05,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:05,794 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:05,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 20:15:05,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:15:05,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:05,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:15:05,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:05,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:15:06,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925993204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:06,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:06,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:15:06,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744819150] [2022-03-03 20:15:06,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:06,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:15:06,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:06,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:15:06,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:15:06,036 INFO L87 Difference]: Start difference. First operand 1148 states and 3882 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:06,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:06,938 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-03-03 20:15:06,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 20:15:06,938 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:15:06,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:06,953 INFO L225 Difference]: With dead ends: 4760 [2022-03-03 20:15:06,954 INFO L226 Difference]: Without dead ends: 4760 [2022-03-03 20:15:06,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 20:15:06,955 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 467 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:06,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 192 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:15:06,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-03-03 20:15:07,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-03-03 20:15:07,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.589635854341737) internal successors, (5126), 1428 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:07,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-03-03 20:15:07,013 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-03-03 20:15:07,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:07,013 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-03-03 20:15:07,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:07,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-03-03 20:15:07,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:15:07,017 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:07,017 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:07,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:07,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-03 20:15:07,239 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:07,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:07,239 INFO L85 PathProgramCache]: Analyzing trace with hash -250388914, now seen corresponding path program 23 times [2022-03-03 20:15:07,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:07,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695504581] [2022-03-03 20:15:07,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:07,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:07,288 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:07,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695504581] [2022-03-03 20:15:07,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695504581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:07,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485323032] [2022-03-03 20:15:07,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:15:07,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:07,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:07,290 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:07,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 20:15:07,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:15:07,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:07,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:15:07,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:07,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:15:07,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485323032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:07,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:07,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:15:07,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230286123] [2022-03-03 20:15:07,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:07,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:15:07,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:07,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:15:07,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:15:07,510 INFO L87 Difference]: Start difference. First operand 1429 states and 5126 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:08,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:08,243 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-03-03 20:15:08,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:15:08,244 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:15:08,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:08,250 INFO L225 Difference]: With dead ends: 4260 [2022-03-03 20:15:08,251 INFO L226 Difference]: Without dead ends: 4260 [2022-03-03 20:15:08,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 20:15:08,252 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 512 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:08,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 174 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:15:08,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-03-03 20:15:08,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-03-03 20:15:08,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.5873684210526315) internal successors, (5112), 1425 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:08,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-03-03 20:15:08,290 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-03-03 20:15:08,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:08,290 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-03-03 20:15:08,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:08,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-03-03 20:15:08,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:15:08,293 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:08,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:08,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-03 20:15:08,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-03 20:15:08,504 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:08,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:08,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1422734772, now seen corresponding path program 24 times [2022-03-03 20:15:08,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:08,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646135974] [2022-03-03 20:15:08,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:08,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:08,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:08,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646135974] [2022-03-03 20:15:08,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646135974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:08,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312796210] [2022-03-03 20:15:08,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:15:08,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:08,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:08,558 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:08,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 20:15:08,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:15:08,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:08,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:15:08,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:08,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:08,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312796210] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:08,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:08,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-03 20:15:08,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759883533] [2022-03-03 20:15:08,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:08,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:15:08,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:08,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:15:08,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:15:08,736 INFO L87 Difference]: Start difference. First operand 1426 states and 5112 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:09,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:09,372 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-03-03 20:15:09,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 20:15:09,372 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:15:09,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:09,379 INFO L225 Difference]: With dead ends: 4602 [2022-03-03 20:15:09,379 INFO L226 Difference]: Without dead ends: 4602 [2022-03-03 20:15:09,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 20:15:09,381 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 429 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:09,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 162 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:15:09,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-03-03 20:15:09,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-03-03 20:15:09,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.592334494773519) internal successors, (5155), 1435 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:09,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-03-03 20:15:09,433 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-03-03 20:15:09,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:09,433 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-03-03 20:15:09,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:09,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-03-03 20:15:09,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:15:09,436 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:09,436 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:09,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:09,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-03 20:15:09,651 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:09,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:09,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1341358684, now seen corresponding path program 25 times [2022-03-03 20:15:09,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:09,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726784978] [2022-03-03 20:15:09,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:09,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:09,693 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:09,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726784978] [2022-03-03 20:15:09,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726784978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:09,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108390616] [2022-03-03 20:15:09,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:15:09,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:09,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:09,695 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:09,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 20:15:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:09,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:15:09,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:09,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:09,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:09,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108390616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:09,868 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:09,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-03 20:15:09,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488691520] [2022-03-03 20:15:09,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:09,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:15:09,868 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:09,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:15:09,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:15:09,868 INFO L87 Difference]: Start difference. First operand 1436 states and 5155 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:10,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:10,427 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-03-03 20:15:10,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 20:15:10,428 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:15:10,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:10,434 INFO L225 Difference]: With dead ends: 4348 [2022-03-03 20:15:10,435 INFO L226 Difference]: Without dead ends: 4344 [2022-03-03 20:15:10,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 20:15:10,436 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 421 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:10,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 153 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:15:10,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-03-03 20:15:10,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-03-03 20:15:10,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:10,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-03-03 20:15:10,479 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-03-03 20:15:10,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:10,479 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-03-03 20:15:10,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:10,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-03-03 20:15:10,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:15:10,482 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:10,482 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:10,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:10,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:10,704 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:10,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:10,704 INFO L85 PathProgramCache]: Analyzing trace with hash -410701468, now seen corresponding path program 26 times [2022-03-03 20:15:10,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:10,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558936714] [2022-03-03 20:15:10,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:10,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:10,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:10,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558936714] [2022-03-03 20:15:10,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558936714] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:10,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019941299] [2022-03-03 20:15:10,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:15:10,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:10,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:10,746 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:10,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 20:15:10,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:15:10,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:10,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:15:10,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:10,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:15:10,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019941299] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:10,951 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:10,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:15:10,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571475380] [2022-03-03 20:15:10,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:10,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:15:10,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:10,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:15:10,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:15:10,952 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:11,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:11,564 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-03-03 20:15:11,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 20:15:11,564 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:15:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:11,571 INFO L225 Difference]: With dead ends: 4035 [2022-03-03 20:15:11,571 INFO L226 Difference]: Without dead ends: 4035 [2022-03-03 20:15:11,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 20:15:11,572 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 445 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:11,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 226 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:15:11,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-03-03 20:15:11,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-03-03 20:15:11,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.5933379597501736) internal successors, (5178), 1441 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-03-03 20:15:11,619 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-03-03 20:15:11,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:11,619 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-03-03 20:15:11,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-03-03 20:15:11,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:15:11,622 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:11,622 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:11,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-03 20:15:11,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:11,823 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:11,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:11,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1232337686, now seen corresponding path program 27 times [2022-03-03 20:15:11,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:11,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83060333] [2022-03-03 20:15:11,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:11,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:11,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:11,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83060333] [2022-03-03 20:15:11,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83060333] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:11,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514028094] [2022-03-03 20:15:11,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:15:11,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:11,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:11,869 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:11,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 20:15:11,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:15:11,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:11,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:15:11,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:11,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:15:12,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514028094] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:12,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:12,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-03 20:15:12,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429567327] [2022-03-03 20:15:12,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:12,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:15:12,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:12,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:15:12,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:15:12,048 INFO L87 Difference]: Start difference. First operand 1442 states and 5178 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:12,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:12,801 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-03-03 20:15:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:15:12,802 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:15:12,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:12,808 INFO L225 Difference]: With dead ends: 3794 [2022-03-03 20:15:12,808 INFO L226 Difference]: Without dead ends: 3790 [2022-03-03 20:15:12,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 20:15:12,809 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 471 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:12,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 175 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:15:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-03-03 20:15:12,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-03-03 20:15:12,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-03-03 20:15:12,844 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-03-03 20:15:12,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:12,844 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-03-03 20:15:12,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:12,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-03-03 20:15:12,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:15:12,847 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:12,847 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:12,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-03 20:15:13,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-03 20:15:13,051 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:13,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:13,051 INFO L85 PathProgramCache]: Analyzing trace with hash -2059201626, now seen corresponding path program 28 times [2022-03-03 20:15:13,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:13,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846397463] [2022-03-03 20:15:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:13,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:13,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:13,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846397463] [2022-03-03 20:15:13,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846397463] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:13,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020463565] [2022-03-03 20:15:13,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:15:13,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:13,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:13,108 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:13,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 20:15:13,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:15:13,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:13,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:15:13,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:13,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:13,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020463565] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:13,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:13,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:15:13,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772962826] [2022-03-03 20:15:13,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:13,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:15:13,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:13,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:15:13,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:15:13,282 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:13,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:13,997 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-03-03 20:15:13,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:15:13,997 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:15:13,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:14,004 INFO L225 Difference]: With dead ends: 3978 [2022-03-03 20:15:14,005 INFO L226 Difference]: Without dead ends: 3978 [2022-03-03 20:15:14,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 20:15:14,005 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 171 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:14,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 232 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:15:14,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-03-03 20:15:14,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-03-03 20:15:14,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.591540404040404) internal successors, (5689), 1584 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:14,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-03-03 20:15:14,041 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-03-03 20:15:14,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:14,041 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-03-03 20:15:14,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:14,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-03-03 20:15:14,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:15:14,044 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:14,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:14,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-03 20:15:14,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:14,252 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:14,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:14,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1977825538, now seen corresponding path program 29 times [2022-03-03 20:15:14,253 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:14,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884557404] [2022-03-03 20:15:14,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:14,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:14,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:14,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884557404] [2022-03-03 20:15:14,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884557404] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:14,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941710880] [2022-03-03 20:15:14,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:15:14,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:14,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:14,299 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:14,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 20:15:14,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:15:14,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:14,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:15:14,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:14,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:14,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941710880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:14,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:14,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:15:14,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799769195] [2022-03-03 20:15:14,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:14,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:15:14,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:14,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:15:14,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:15:14,446 INFO L87 Difference]: Start difference. First operand 1585 states and 5689 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:14,978 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-03-03 20:15:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 20:15:14,978 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:15:14,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:14,985 INFO L225 Difference]: With dead ends: 3706 [2022-03-03 20:15:14,985 INFO L226 Difference]: Without dead ends: 3702 [2022-03-03 20:15:14,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 20:15:14,985 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 254 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:14,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 160 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:15:14,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-03-03 20:15:15,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-03-03 20:15:15,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.5870393900889455) internal successors, (5646), 1574 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:15,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-03-03 20:15:15,022 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-03-03 20:15:15,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:15,022 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-03-03 20:15:15,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:15,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-03-03 20:15:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:15:15,026 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:15,026 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:15,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:15,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:15,248 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:15,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:15,248 INFO L85 PathProgramCache]: Analyzing trace with hash 802049786, now seen corresponding path program 30 times [2022-03-03 20:15:15,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:15,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411987610] [2022-03-03 20:15:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:15,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:15,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:15,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411987610] [2022-03-03 20:15:15,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411987610] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:15,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173295894] [2022-03-03 20:15:15,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:15:15,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:15,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:15,296 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:15,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 20:15:15,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:15:15,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:15,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:15:15,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:15,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:15,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173295894] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:15,456 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:15,456 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:15:15,456 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18015588] [2022-03-03 20:15:15,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:15,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:15:15,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:15,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:15:15,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:15:15,457 INFO L87 Difference]: Start difference. First operand 1575 states and 5646 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:16,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:16,041 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-03-03 20:15:16,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 20:15:16,041 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:15:16,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:16,048 INFO L225 Difference]: With dead ends: 4114 [2022-03-03 20:15:16,048 INFO L226 Difference]: Without dead ends: 4102 [2022-03-03 20:15:16,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 20:15:16,049 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 279 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:16,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 206 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:15:16,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-03-03 20:15:16,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-03-03 20:15:16,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.5884567126725218) internal successors, (5720), 1594 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-03-03 20:15:16,102 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-03-03 20:15:16,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:16,102 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-03-03 20:15:16,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:16,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-03-03 20:15:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:15:16,104 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:16,104 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:16,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-03 20:15:16,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-03 20:15:16,305 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:16,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:16,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1895790794, now seen corresponding path program 31 times [2022-03-03 20:15:16,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:16,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470982520] [2022-03-03 20:15:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:16,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:16,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:16,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470982520] [2022-03-03 20:15:16,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470982520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:16,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559774122] [2022-03-03 20:15:16,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:15:16,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:16,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:16,362 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:16,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 20:15:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:16,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:15:16,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:16,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:16,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:16,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559774122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:16,571 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:16,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:15:16,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779889075] [2022-03-03 20:15:16,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:16,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:15:16,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:16,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:15:16,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:15:16,572 INFO L87 Difference]: Start difference. First operand 1595 states and 5720 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:17,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:17,226 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-03-03 20:15:17,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 20:15:17,226 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:15:17,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:17,232 INFO L225 Difference]: With dead ends: 3694 [2022-03-03 20:15:17,232 INFO L226 Difference]: Without dead ends: 3694 [2022-03-03 20:15:17,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 20:15:17,233 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 339 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:17,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 284 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:15:17,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-03-03 20:15:17,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-03-03 20:15:17,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5842763549731984) internal successors, (6018), 1679 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:17,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-03-03 20:15:17,270 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-03-03 20:15:17,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:17,270 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-03-03 20:15:17,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:17,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-03-03 20:15:17,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:15:17,274 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:17,274 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:17,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:17,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-03 20:15:17,487 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:17,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:17,488 INFO L85 PathProgramCache]: Analyzing trace with hash -252751640, now seen corresponding path program 32 times [2022-03-03 20:15:17,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:17,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908950897] [2022-03-03 20:15:17,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:17,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:17,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:17,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908950897] [2022-03-03 20:15:17,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908950897] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:17,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215333699] [2022-03-03 20:15:17,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:15:17,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:17,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:17,554 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:17,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 20:15:17,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:15:17,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:17,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:15:17,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:17,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:17,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215333699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:17,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:17,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 20:15:17,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071575245] [2022-03-03 20:15:17,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:17,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:15:17,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:17,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:15:17,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:15:17,786 INFO L87 Difference]: Start difference. First operand 1680 states and 6018 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:18,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:18,576 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-03-03 20:15:18,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:15:18,576 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:15:18,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:18,582 INFO L225 Difference]: With dead ends: 3420 [2022-03-03 20:15:18,582 INFO L226 Difference]: Without dead ends: 3416 [2022-03-03 20:15:18,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 20:15:18,583 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 287 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:18,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 207 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:15:18,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-03-03 20:15:18,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-03-03 20:15:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.5819916517590937) internal successors, (6007), 1677 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-03-03 20:15:18,619 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-03-03 20:15:18,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:18,619 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-03-03 20:15:18,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:18,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-03-03 20:15:18,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 20:15:18,622 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:18,622 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:18,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-03 20:15:18,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-03 20:15:18,823 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:18,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:18,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1520208818, now seen corresponding path program 33 times [2022-03-03 20:15:18,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:18,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135118921] [2022-03-03 20:15:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:18,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:18,869 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:18,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135118921] [2022-03-03 20:15:18,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135118921] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:18,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603985498] [2022-03-03 20:15:18,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:15:18,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:18,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:18,871 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:18,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-03 20:15:18,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:15:18,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:18,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:15:18,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:18,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:18,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:19,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603985498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:19,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:19,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 20:15:19,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040175887] [2022-03-03 20:15:19,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:19,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:15:19,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:19,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:15:19,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:15:19,038 INFO L87 Difference]: Start difference. First operand 1678 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:19,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:19,613 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-03-03 20:15:19,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 20:15:19,613 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 20:15:19,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:19,618 INFO L225 Difference]: With dead ends: 3256 [2022-03-03 20:15:19,619 INFO L226 Difference]: Without dead ends: 3244 [2022-03-03 20:15:19,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 20:15:19,619 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 275 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:19,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 153 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:15:19,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-03-03 20:15:19,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-03-03 20:15:19,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5797014925373136) internal successors, (5996), 1675 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:19,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-03-03 20:15:19,654 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-03-03 20:15:19,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:19,654 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-03-03 20:15:19,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:19,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-03-03 20:15:19,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:15:19,658 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:19,658 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:19,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:19,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:19,871 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:19,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:19,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1154803164, now seen corresponding path program 4 times [2022-03-03 20:15:19,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:19,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947897824] [2022-03-03 20:15:19,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:19,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:20,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:20,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947897824] [2022-03-03 20:15:20,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947897824] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:20,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421722707] [2022-03-03 20:15:20,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:15:20,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:20,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:20,099 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:20,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-03 20:15:20,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:15:20,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:20,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:15:20,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:20,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:15:20,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:20,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-03 20:15:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:20,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:20,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:20,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:15:20,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-03-03 20:15:20,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:20,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:20,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:15:20,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:15:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:21,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421722707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:21,150 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:21,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:15:21,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765567635] [2022-03-03 20:15:21,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:21,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:15:21,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:21,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:15:21,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:15:21,151 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:23,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:23,399 INFO L93 Difference]: Finished difference Result 3843 states and 12416 transitions. [2022-03-03 20:15:23,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 20:15:23,399 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:15:23,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:23,406 INFO L225 Difference]: With dead ends: 3843 [2022-03-03 20:15:23,406 INFO L226 Difference]: Without dead ends: 3813 [2022-03-03 20:15:23,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=758, Invalid=3148, Unknown=0, NotChecked=0, Total=3906 [2022-03-03 20:15:23,407 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 638 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:23,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 254 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:15:23,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2022-03-03 20:15:23,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 1792. [2022-03-03 20:15:23,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1791 states have (on average 3.5907314349525405) internal successors, (6431), 1791 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:23,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 6431 transitions. [2022-03-03 20:15:23,453 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 6431 transitions. Word has length 26 [2022-03-03 20:15:23,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:23,454 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 6431 transitions. [2022-03-03 20:15:23,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:23,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 6431 transitions. [2022-03-03 20:15:23,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:15:23,457 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:23,457 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:23,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:23,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-03 20:15:23,658 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:23,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:23,658 INFO L85 PathProgramCache]: Analyzing trace with hash -873594852, now seen corresponding path program 5 times [2022-03-03 20:15:23,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:23,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142585455] [2022-03-03 20:15:23,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:23,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:23,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:23,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:23,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142585455] [2022-03-03 20:15:23,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142585455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:23,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278103514] [2022-03-03 20:15:23,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:15:23,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:23,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:23,912 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:23,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-03 20:15:23,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:15:23,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:23,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:15:23,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:24,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:15:24,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:24,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-03 20:15:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:24,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:24,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:24,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:15:24,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-03-03 20:15:24,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:24,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:24,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:15:24,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:15:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:24,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278103514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:24,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:24,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 20:15:24,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681868475] [2022-03-03 20:15:24,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:24,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:15:24,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:24,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:15:24,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:15:24,987 INFO L87 Difference]: Start difference. First operand 1792 states and 6431 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:29,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:29,153 INFO L93 Difference]: Finished difference Result 4418 states and 14016 transitions. [2022-03-03 20:15:29,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-03 20:15:29,154 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:15:29,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:29,175 INFO L225 Difference]: With dead ends: 4418 [2022-03-03 20:15:29,175 INFO L226 Difference]: Without dead ends: 4381 [2022-03-03 20:15:29,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3042 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1244, Invalid=7686, Unknown=0, NotChecked=0, Total=8930 [2022-03-03 20:15:29,176 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 614 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 2076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:29,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 434 Invalid, 2076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1821 Invalid, 0 Unknown, 139 Unchecked, 1.0s Time] [2022-03-03 20:15:29,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4381 states. [2022-03-03 20:15:29,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4381 to 1844. [2022-03-03 20:15:29,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 3.583288117200217) internal successors, (6604), 1843 states have internal predecessors, (6604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:29,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 6604 transitions. [2022-03-03 20:15:29,214 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 6604 transitions. Word has length 26 [2022-03-03 20:15:29,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:29,214 INFO L470 AbstractCegarLoop]: Abstraction has 1844 states and 6604 transitions. [2022-03-03 20:15:29,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:29,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 6604 transitions. [2022-03-03 20:15:29,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:15:29,218 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:29,218 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:29,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:29,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-03 20:15:29,420 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:29,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:29,420 INFO L85 PathProgramCache]: Analyzing trace with hash 717834456, now seen corresponding path program 34 times [2022-03-03 20:15:29,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:29,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237009451] [2022-03-03 20:15:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:29,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:29,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:29,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237009451] [2022-03-03 20:15:29,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237009451] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:29,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891309030] [2022-03-03 20:15:29,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:15:29,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:29,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:29,737 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:29,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-03 20:15:29,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:15:29,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:29,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:15:29,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:30,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:15:30,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:30,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:30,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-03-03 20:15:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:30,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:30,258 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:15:30,258 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 22 treesize of output 47 [2022-03-03 20:15:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:30,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891309030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:30,412 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:30,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-03 20:15:30,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633714260] [2022-03-03 20:15:30,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:30,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:15:30,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:30,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:15:30,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:15:30,413 INFO L87 Difference]: Start difference. First operand 1844 states and 6604 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 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) [2022-03-03 20:15:33,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:33,529 INFO L93 Difference]: Finished difference Result 3646 states and 12238 transitions. [2022-03-03 20:15:33,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-03 20:15:33,529 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 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 26 [2022-03-03 20:15:33,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:33,536 INFO L225 Difference]: With dead ends: 3646 [2022-03-03 20:15:33,536 INFO L226 Difference]: Without dead ends: 3616 [2022-03-03 20:15:33,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1958 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=943, Invalid=5219, Unknown=0, NotChecked=0, Total=6162 [2022-03-03 20:15:33,538 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 304 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 2009 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:33,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 375 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2009 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:15:33,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3616 states. [2022-03-03 20:15:33,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3616 to 1896. [2022-03-03 20:15:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.5736147757255936) internal successors, (6772), 1895 states have internal predecessors, (6772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:33,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6772 transitions. [2022-03-03 20:15:33,587 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6772 transitions. Word has length 26 [2022-03-03 20:15:33,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:33,587 INFO L470 AbstractCegarLoop]: Abstraction has 1896 states and 6772 transitions. [2022-03-03 20:15:33,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 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) [2022-03-03 20:15:33,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6772 transitions. [2022-03-03 20:15:33,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:15:33,592 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:33,592 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:33,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:33,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:33,795 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:33,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:33,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1522881632, now seen corresponding path program 6 times [2022-03-03 20:15:33,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:33,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713457819] [2022-03-03 20:15:33,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:33,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:34,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:34,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713457819] [2022-03-03 20:15:34,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713457819] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:34,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404093114] [2022-03-03 20:15:34,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:15:34,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:34,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:34,037 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:34,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-03 20:15:34,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:15:34,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:34,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:15:34,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:34,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:15:34,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:34,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-03 20:15:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:34,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:34,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:34,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:15:34,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-03-03 20:15:34,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:34,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:34,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:15:34,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:15:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:35,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404093114] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:35,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:35,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:15:35,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418752438] [2022-03-03 20:15:35,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:35,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:15:35,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:35,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:15:35,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:15:35,044 INFO L87 Difference]: Start difference. First operand 1896 states and 6772 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:37,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:37,881 INFO L93 Difference]: Finished difference Result 4636 states and 14530 transitions. [2022-03-03 20:15:37,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-03 20:15:37,882 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:15:37,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:37,890 INFO L225 Difference]: With dead ends: 4636 [2022-03-03 20:15:37,890 INFO L226 Difference]: Without dead ends: 4621 [2022-03-03 20:15:37,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1649 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=992, Invalid=4120, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 20:15:37,891 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 783 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:37,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 365 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1238 Invalid, 0 Unknown, 175 Unchecked, 0.7s Time] [2022-03-03 20:15:37,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4621 states. [2022-03-03 20:15:37,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4621 to 1956. [2022-03-03 20:15:37,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1955 states have (on average 3.5611253196930948) internal successors, (6962), 1955 states have internal predecessors, (6962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:37,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 6962 transitions. [2022-03-03 20:15:37,934 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 6962 transitions. Word has length 26 [2022-03-03 20:15:37,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:37,934 INFO L470 AbstractCegarLoop]: Abstraction has 1956 states and 6962 transitions. [2022-03-03 20:15:37,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:37,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 6962 transitions. [2022-03-03 20:15:37,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:15:37,938 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:37,938 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:37,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-03 20:15:38,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-03 20:15:38,138 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:38,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:38,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1221704100, now seen corresponding path program 35 times [2022-03-03 20:15:38,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:38,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347665002] [2022-03-03 20:15:38,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:38,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:38,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:38,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:38,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347665002] [2022-03-03 20:15:38,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347665002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:38,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316310555] [2022-03-03 20:15:38,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:15:38,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:38,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:38,461 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:38,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-03 20:15:38,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:15:38,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:38,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:15:38,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:38,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:15:38,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:38,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:38,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-03-03 20:15:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:38,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:38,962 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:15:38,963 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 22 treesize of output 47 [2022-03-03 20:15:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:39,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316310555] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:39,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:39,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-03 20:15:39,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630103857] [2022-03-03 20:15:39,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:39,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:15:39,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:39,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:15:39,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:15:39,127 INFO L87 Difference]: Start difference. First operand 1956 states and 6962 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 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) [2022-03-03 20:15:43,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:43,122 INFO L93 Difference]: Finished difference Result 4533 states and 14855 transitions. [2022-03-03 20:15:43,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-03 20:15:43,122 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 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 26 [2022-03-03 20:15:43,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:43,131 INFO L225 Difference]: With dead ends: 4533 [2022-03-03 20:15:43,131 INFO L226 Difference]: Without dead ends: 4471 [2022-03-03 20:15:43,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3555 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1607, Invalid=8293, Unknown=0, NotChecked=0, Total=9900 [2022-03-03 20:15:43,132 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 468 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 2192 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 2301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:43,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 536 Invalid, 2301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2192 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 20:15:43,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4471 states. [2022-03-03 20:15:43,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4471 to 1997. [2022-03-03 20:15:43,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1997 states, 1996 states have (on average 3.561623246492986) internal successors, (7109), 1996 states have internal predecessors, (7109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:43,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1997 states to 1997 states and 7109 transitions. [2022-03-03 20:15:43,192 INFO L78 Accepts]: Start accepts. Automaton has 1997 states and 7109 transitions. Word has length 26 [2022-03-03 20:15:43,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:43,193 INFO L470 AbstractCegarLoop]: Abstraction has 1997 states and 7109 transitions. [2022-03-03 20:15:43,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 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) [2022-03-03 20:15:43,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1997 states and 7109 transitions. [2022-03-03 20:15:43,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:15:43,197 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:43,197 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:43,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:43,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:43,411 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:43,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:43,412 INFO L85 PathProgramCache]: Analyzing trace with hash 2096944352, now seen corresponding path program 36 times [2022-03-03 20:15:43,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:43,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762627745] [2022-03-03 20:15:43,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:43,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:43,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:43,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762627745] [2022-03-03 20:15:43,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762627745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:43,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688006479] [2022-03-03 20:15:43,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:15:43,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:43,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:43,667 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:43,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-03 20:15:43,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:15:43,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:43,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:15:43,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:43,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:15:43,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:15:43,986 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:15:43,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2022-03-03 20:15:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:44,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:44,238 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:15:44,238 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 22 treesize of output 47 [2022-03-03 20:15:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:44,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688006479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:44,662 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:44,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2022-03-03 20:15:44,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554954075] [2022-03-03 20:15:44,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:44,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:15:44,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:44,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:15:44,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:15:44,663 INFO L87 Difference]: Start difference. First operand 1997 states and 7109 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:53,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:53,863 INFO L93 Difference]: Finished difference Result 4887 states and 16148 transitions. [2022-03-03 20:15:53,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-03-03 20:15:53,864 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:15:53,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:53,873 INFO L225 Difference]: With dead ends: 4887 [2022-03-03 20:15:53,873 INFO L226 Difference]: Without dead ends: 4872 [2022-03-03 20:15:53,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8705 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2599, Invalid=21271, Unknown=0, NotChecked=0, Total=23870 [2022-03-03 20:15:53,875 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 399 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 4088 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 4826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 4088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 681 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:53,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 912 Invalid, 4826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 4088 Invalid, 0 Unknown, 681 Unchecked, 2.0s Time] [2022-03-03 20:15:53,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2022-03-03 20:15:53,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 2011. [2022-03-03 20:15:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2011 states, 2010 states have (on average 3.5621890547263684) internal successors, (7160), 2010 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:53,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 7160 transitions. [2022-03-03 20:15:53,926 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 7160 transitions. Word has length 26 [2022-03-03 20:15:53,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:53,926 INFO L470 AbstractCegarLoop]: Abstraction has 2011 states and 7160 transitions. [2022-03-03 20:15:53,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:53,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 7160 transitions. [2022-03-03 20:15:53,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:15:53,929 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:53,929 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:53,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-03 20:15:54,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:54,130 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:54,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:54,130 INFO L85 PathProgramCache]: Analyzing trace with hash -964441720, now seen corresponding path program 7 times [2022-03-03 20:15:54,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:54,130 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904941128] [2022-03-03 20:15:54,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:54,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:54,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:54,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:54,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904941128] [2022-03-03 20:15:54,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904941128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:54,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39066175] [2022-03-03 20:15:54,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:15:54,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:54,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:54,352 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:54,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-03 20:15:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:54,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:15:54,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:54,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:15:54,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:54,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-03 20:15:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:54,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:54,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:54,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:15:54,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-03-03 20:15:55,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:55,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:55,113 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:15:55,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:15:55,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:55,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39066175] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:55,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:55,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:15:55,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026960462] [2022-03-03 20:15:55,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:55,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:15:55,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:55,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:15:55,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:15:55,355 INFO L87 Difference]: Start difference. First operand 2011 states and 7160 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:57,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:15:57,364 INFO L93 Difference]: Finished difference Result 4138 states and 13429 transitions. [2022-03-03 20:15:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 20:15:57,365 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:15:57,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:15:57,373 INFO L225 Difference]: With dead ends: 4138 [2022-03-03 20:15:57,373 INFO L226 Difference]: Without dead ends: 4108 [2022-03-03 20:15:57,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=692, Invalid=2848, Unknown=0, NotChecked=0, Total=3540 [2022-03-03 20:15:57,373 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 467 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:15:57,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 302 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 20:15:57,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4108 states. [2022-03-03 20:15:57,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4108 to 2031. [2022-03-03 20:15:57,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 3.5610837438423646) internal successors, (7229), 2030 states have internal predecessors, (7229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:57,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 7229 transitions. [2022-03-03 20:15:57,412 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 7229 transitions. Word has length 26 [2022-03-03 20:15:57,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:15:57,412 INFO L470 AbstractCegarLoop]: Abstraction has 2031 states and 7229 transitions. [2022-03-03 20:15:57,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:15:57,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 7229 transitions. [2022-03-03 20:15:57,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:15:57,427 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:15:57,427 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:15:57,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-03 20:15:57,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-03 20:15:57,628 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:15:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:15:57,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2016520892, now seen corresponding path program 8 times [2022-03-03 20:15:57,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:15:57,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209023316] [2022-03-03 20:15:57,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:15:57,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:15:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:15:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:57,850 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:15:57,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209023316] [2022-03-03 20:15:57,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209023316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:15:57,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371849337] [2022-03-03 20:15:57,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:15:57,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:15:57,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:15:57,851 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:15:57,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-03 20:15:57,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:15:57,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:15:57,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:15:57,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:15:58,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:58,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:15:58,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 34 [2022-03-03 20:15:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:58,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:15:58,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:58,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:58,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:15:58,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 48 [2022-03-03 20:15:58,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:15:58,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-03-03 20:15:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:15:58,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371849337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:15:58,891 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:15:58,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 20:15:58,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988922801] [2022-03-03 20:15:58,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:15:58,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:15:58,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:15:58,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:15:58,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:15:58,892 INFO L87 Difference]: Start difference. First operand 2031 states and 7229 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:05,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:05,291 INFO L93 Difference]: Finished difference Result 5067 states and 16485 transitions. [2022-03-03 20:16:05,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-03 20:16:05,292 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:16:05,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:05,302 INFO L225 Difference]: With dead ends: 5067 [2022-03-03 20:16:05,302 INFO L226 Difference]: Without dead ends: 5022 [2022-03-03 20:16:05,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3961 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1904, Invalid=9652, Unknown=0, NotChecked=0, Total=11556 [2022-03-03 20:16:05,303 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 629 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 2414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 425 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:05,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 693 Invalid, 2414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1880 Invalid, 0 Unknown, 425 Unchecked, 1.0s Time] [2022-03-03 20:16:05,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5022 states. [2022-03-03 20:16:05,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5022 to 2104. [2022-03-03 20:16:05,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 3.5658582976699953) internal successors, (7499), 2103 states have internal predecessors, (7499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:05,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 7499 transitions. [2022-03-03 20:16:05,352 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 7499 transitions. Word has length 26 [2022-03-03 20:16:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:05,352 INFO L470 AbstractCegarLoop]: Abstraction has 2104 states and 7499 transitions. [2022-03-03 20:16:05,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:05,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 7499 transitions. [2022-03-03 20:16:05,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:16:05,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:05,356 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:16:05,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-03 20:16:05,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-03 20:16:05,557 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:16:05,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:05,557 INFO L85 PathProgramCache]: Analyzing trace with hash 784538682, now seen corresponding path program 9 times [2022-03-03 20:16:05,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:05,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929265150] [2022-03-03 20:16:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:05,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:05,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:05,759 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:05,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929265150] [2022-03-03 20:16:05,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929265150] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:05,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610448874] [2022-03-03 20:16:05,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:16:05,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:05,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:05,760 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:05,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-03 20:16:05,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:16:05,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:05,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:16:05,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:06,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:16:06,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:06,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-03-03 20:16:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:06,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:06,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:06,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:06,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-03-03 20:16:06,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:06,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:06,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:06,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:16:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:06,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610448874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:06,847 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:06,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:16:06,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524401180] [2022-03-03 20:16:06,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:06,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:16:06,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:06,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:16:06,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:16:06,848 INFO L87 Difference]: Start difference. First operand 2104 states and 7499 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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) [2022-03-03 20:16:08,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:08,842 INFO L93 Difference]: Finished difference Result 4259 states and 13862 transitions. [2022-03-03 20:16:08,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 20:16:08,842 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:16:08,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:08,850 INFO L225 Difference]: With dead ends: 4259 [2022-03-03 20:16:08,850 INFO L226 Difference]: Without dead ends: 4244 [2022-03-03 20:16:08,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=710, Invalid=2950, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 20:16:08,851 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 503 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:08,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 263 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1122 Invalid, 0 Unknown, 22 Unchecked, 0.6s Time] [2022-03-03 20:16:08,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4244 states. [2022-03-03 20:16:08,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4244 to 2123. [2022-03-03 20:16:08,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 3.5607917059377945) internal successors, (7556), 2122 states have internal predecessors, (7556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 7556 transitions. [2022-03-03 20:16:08,917 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 7556 transitions. Word has length 26 [2022-03-03 20:16:08,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:08,917 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 7556 transitions. [2022-03-03 20:16:08,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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) [2022-03-03 20:16:08,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 7556 transitions. [2022-03-03 20:16:08,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:16:08,921 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:08,922 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:16:08,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-03 20:16:09,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-03 20:16:09,127 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:16:09,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:09,127 INFO L85 PathProgramCache]: Analyzing trace with hash 116575752, now seen corresponding path program 10 times [2022-03-03 20:16:09,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:09,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818967985] [2022-03-03 20:16:09,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:09,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:09,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:09,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818967985] [2022-03-03 20:16:09,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818967985] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:09,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596069615] [2022-03-03 20:16:09,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:16:09,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:09,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:09,333 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:09,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-03 20:16:09,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:16:09,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:09,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:16:09,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:09,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:16:09,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:09,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-03 20:16:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:09,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:09,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:09,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:09,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-03-03 20:16:10,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:10,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:10,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:10,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:16:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:10,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596069615] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:10,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:10,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:16:10,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773492997] [2022-03-03 20:16:10,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:10,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:16:10,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:10,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:16:10,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:16:10,318 INFO L87 Difference]: Start difference. First operand 2123 states and 7556 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:12,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:12,280 INFO L93 Difference]: Finished difference Result 4248 states and 13825 transitions. [2022-03-03 20:16:12,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 20:16:12,280 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:16:12,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:12,287 INFO L225 Difference]: With dead ends: 4248 [2022-03-03 20:16:12,287 INFO L226 Difference]: Without dead ends: 4241 [2022-03-03 20:16:12,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=710, Invalid=2950, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 20:16:12,288 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 553 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:12,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 307 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1311 Invalid, 0 Unknown, 109 Unchecked, 0.7s Time] [2022-03-03 20:16:12,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2022-03-03 20:16:12,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 2112. [2022-03-03 20:16:12,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 3.5641875888204644) internal successors, (7524), 2111 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:12,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 7524 transitions. [2022-03-03 20:16:12,335 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 7524 transitions. Word has length 26 [2022-03-03 20:16:12,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:12,335 INFO L470 AbstractCegarLoop]: Abstraction has 2112 states and 7524 transitions. [2022-03-03 20:16:12,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:12,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 7524 transitions. [2022-03-03 20:16:12,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:16:12,339 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:12,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:16:12,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-03 20:16:12,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:12,539 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:16:12,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:12,540 INFO L85 PathProgramCache]: Analyzing trace with hash -635282148, now seen corresponding path program 11 times [2022-03-03 20:16:12,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:12,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792803816] [2022-03-03 20:16:12,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:12,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:12,754 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:12,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792803816] [2022-03-03 20:16:12,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792803816] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:12,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539803148] [2022-03-03 20:16:12,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:16:12,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:12,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:12,756 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:12,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-03 20:16:12,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:16:12,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:12,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:16:12,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:13,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:16:13,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:13,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:13,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2022-03-03 20:16:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:13,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:13,333 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:16:13,334 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 21 treesize of output 56 [2022-03-03 20:16:13,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:13,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:13,485 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:13,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:16:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:13,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539803148] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:13,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:13,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-03 20:16:13,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304403587] [2022-03-03 20:16:13,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:13,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:16:13,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:13,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:16:13,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:16:13,693 INFO L87 Difference]: Start difference. First operand 2112 states and 7524 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:19,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:19,478 INFO L93 Difference]: Finished difference Result 4818 states and 15705 transitions. [2022-03-03 20:16:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-03 20:16:19,478 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:16:19,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:19,486 INFO L225 Difference]: With dead ends: 4818 [2022-03-03 20:16:19,486 INFO L226 Difference]: Without dead ends: 4788 [2022-03-03 20:16:19,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3590 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1445, Invalid=9475, Unknown=0, NotChecked=0, Total=10920 [2022-03-03 20:16:19,487 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 416 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 3492 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 3563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 3492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:19,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 741 Invalid, 3563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 3492 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-03 20:16:19,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4788 states. [2022-03-03 20:16:19,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4788 to 2127. [2022-03-03 20:16:19,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2127 states, 2126 states have (on average 3.5696142991533395) internal successors, (7589), 2126 states have internal predecessors, (7589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2127 states to 2127 states and 7589 transitions. [2022-03-03 20:16:19,536 INFO L78 Accepts]: Start accepts. Automaton has 2127 states and 7589 transitions. Word has length 26 [2022-03-03 20:16:19,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:19,536 INFO L470 AbstractCegarLoop]: Abstraction has 2127 states and 7589 transitions. [2022-03-03 20:16:19,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:19,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2127 states and 7589 transitions. [2022-03-03 20:16:19,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:16:19,539 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:19,539 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:16:19,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-03 20:16:19,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-03 20:16:19,740 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:16:19,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:19,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1903957512, now seen corresponding path program 12 times [2022-03-03 20:16:19,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:19,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622596767] [2022-03-03 20:16:19,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:19,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:19,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:19,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622596767] [2022-03-03 20:16:19,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622596767] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:19,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86079744] [2022-03-03 20:16:19,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:16:19,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:19,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:19,976 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:19,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-03 20:16:19,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:16:19,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:19,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:16:20,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:20,260 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-03-03 20:16:20,260 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 63 [2022-03-03 20:16:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:20,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:20,533 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:16:20,533 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 21 treesize of output 56 [2022-03-03 20:16:20,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:20,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:20,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:20,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:16:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:20,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86079744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:20,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:20,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-03 20:16:20,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469765898] [2022-03-03 20:16:20,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:20,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:16:20,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:20,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:16:20,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:16:20,891 INFO L87 Difference]: Start difference. First operand 2127 states and 7589 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:25,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:25,849 INFO L93 Difference]: Finished difference Result 4503 states and 14748 transitions. [2022-03-03 20:16:25,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-03 20:16:25,849 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:16:25,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:25,857 INFO L225 Difference]: With dead ends: 4503 [2022-03-03 20:16:25,857 INFO L226 Difference]: Without dead ends: 4473 [2022-03-03 20:16:25,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2738 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1209, Invalid=7163, Unknown=0, NotChecked=0, Total=8372 [2022-03-03 20:16:25,858 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 463 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 2321 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 2405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:25,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 478 Invalid, 2405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2321 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 20:16:25,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4473 states. [2022-03-03 20:16:25,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4473 to 2130. [2022-03-03 20:16:25,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 2129 states have (on average 3.5720995772663224) internal successors, (7605), 2129 states have internal predecessors, (7605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:25,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 7605 transitions. [2022-03-03 20:16:25,899 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 7605 transitions. Word has length 26 [2022-03-03 20:16:25,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:25,899 INFO L470 AbstractCegarLoop]: Abstraction has 2130 states and 7605 transitions. [2022-03-03 20:16:25,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:25,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 7605 transitions. [2022-03-03 20:16:25,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:16:25,904 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:25,904 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:16:25,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-03 20:16:26,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-03 20:16:26,104 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:16:26,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:26,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1496339428, now seen corresponding path program 13 times [2022-03-03 20:16:26,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:26,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635007041] [2022-03-03 20:16:26,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:26,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:26,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:26,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635007041] [2022-03-03 20:16:26,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635007041] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:26,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718403358] [2022-03-03 20:16:26,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:16:26,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:26,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:26,368 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:26,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-03 20:16:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:26,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:16:26,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:26,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:16:26,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:26,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-03-03 20:16:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:26,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:26,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:26,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:26,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-03-03 20:16:27,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:27,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:27,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:27,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:16:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:27,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718403358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:27,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:27,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:16:27,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965052014] [2022-03-03 20:16:27,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:27,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:16:27,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:27,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:16:27,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:16:27,418 INFO L87 Difference]: Start difference. First operand 2130 states and 7605 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:31,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:31,049 INFO L93 Difference]: Finished difference Result 5861 states and 18618 transitions. [2022-03-03 20:16:31,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-03 20:16:31,050 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:16:31,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:31,060 INFO L225 Difference]: With dead ends: 5861 [2022-03-03 20:16:31,060 INFO L226 Difference]: Without dead ends: 5831 [2022-03-03 20:16:31,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2312 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1359, Invalid=4961, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 20:16:31,061 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 600 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:31,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 472 Invalid, 1966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1613 Invalid, 0 Unknown, 200 Unchecked, 0.9s Time] [2022-03-03 20:16:31,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5831 states. [2022-03-03 20:16:31,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5831 to 2263. [2022-03-03 20:16:31,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 3.609637488947834) internal successors, (8165), 2262 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:31,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 8165 transitions. [2022-03-03 20:16:31,133 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 8165 transitions. Word has length 26 [2022-03-03 20:16:31,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:31,134 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 8165 transitions. [2022-03-03 20:16:31,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:31,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 8165 transitions. [2022-03-03 20:16:31,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:16:31,138 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:31,138 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:16:31,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-03-03 20:16:31,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:31,338 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:16:31,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:31,339 INFO L85 PathProgramCache]: Analyzing trace with hash 93530948, now seen corresponding path program 14 times [2022-03-03 20:16:31,339 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:31,339 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137420970] [2022-03-03 20:16:31,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:31,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:31,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:31,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:31,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137420970] [2022-03-03 20:16:31,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137420970] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:31,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237946058] [2022-03-03 20:16:31,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:16:31,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:31,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:31,566 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:31,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-03 20:16:31,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:16:31,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:31,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:16:31,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:31,916 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 20:16:31,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 62 [2022-03-03 20:16:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:32,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:32,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:32,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:32,526 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:32,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 55 [2022-03-03 20:16:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:32,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237946058] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:32,772 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:32,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 20:16:32,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274416590] [2022-03-03 20:16:32,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:32,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:16:32,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:32,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:16:32,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:16:32,773 INFO L87 Difference]: Start difference. First operand 2263 states and 8165 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:47,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:47,333 INFO L93 Difference]: Finished difference Result 6719 states and 22167 transitions. [2022-03-03 20:16:47,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2022-03-03 20:16:47,333 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:16:47,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:47,346 INFO L225 Difference]: With dead ends: 6719 [2022-03-03 20:16:47,346 INFO L226 Difference]: Without dead ends: 6704 [2022-03-03 20:16:47,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15542 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=5109, Invalid=32721, Unknown=0, NotChecked=0, Total=37830 [2022-03-03 20:16:47,348 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 682 mSDsluCounter, 1908 mSDsCounter, 0 mSdLazyCounter, 2526 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 3558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 2526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 894 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:47,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 1057 Invalid, 3558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 2526 Invalid, 0 Unknown, 894 Unchecked, 1.5s Time] [2022-03-03 20:16:47,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6704 states. [2022-03-03 20:16:47,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6704 to 2276. [2022-03-03 20:16:47,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 3.6145054945054946) internal successors, (8223), 2275 states have internal predecessors, (8223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:47,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 8223 transitions. [2022-03-03 20:16:47,409 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 8223 transitions. Word has length 26 [2022-03-03 20:16:47,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:47,409 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 8223 transitions. [2022-03-03 20:16:47,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:47,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 8223 transitions. [2022-03-03 20:16:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:16:47,413 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:47,413 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:16:47,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-03 20:16:47,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-03 20:16:47,614 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:16:47,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:47,614 INFO L85 PathProgramCache]: Analyzing trace with hash -957049752, now seen corresponding path program 15 times [2022-03-03 20:16:47,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:47,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606115261] [2022-03-03 20:16:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:47,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:47,801 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:47,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606115261] [2022-03-03 20:16:47,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606115261] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:47,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363807918] [2022-03-03 20:16:47,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:16:47,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:47,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:47,802 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:47,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-03 20:16:47,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:16:47,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:47,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:16:47,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:48,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:16:48,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:48,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-03 20:16:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:48,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:48,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:48,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:48,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-03-03 20:16:48,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:48,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:48,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:48,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:16:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:48,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363807918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:48,714 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:48,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:16:48,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381748480] [2022-03-03 20:16:48,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:48,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:16:48,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:48,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:16:48,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:16:48,715 INFO L87 Difference]: Start difference. First operand 2276 states and 8223 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:53,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:53,204 INFO L93 Difference]: Finished difference Result 6246 states and 20287 transitions. [2022-03-03 20:16:53,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-03 20:16:53,204 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:16:53,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:53,216 INFO L225 Difference]: With dead ends: 6246 [2022-03-03 20:16:53,217 INFO L226 Difference]: Without dead ends: 6216 [2022-03-03 20:16:53,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2855 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1670, Invalid=6340, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 20:16:53,218 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 670 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:53,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 559 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1829 Invalid, 0 Unknown, 247 Unchecked, 1.0s Time] [2022-03-03 20:16:53,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6216 states. [2022-03-03 20:16:53,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6216 to 2308. [2022-03-03 20:16:53,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 3.6289553532726484) internal successors, (8372), 2307 states have internal predecessors, (8372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:53,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 8372 transitions. [2022-03-03 20:16:53,290 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 8372 transitions. Word has length 26 [2022-03-03 20:16:53,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:53,290 INFO L470 AbstractCegarLoop]: Abstraction has 2308 states and 8372 transitions. [2022-03-03 20:16:53,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:53,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 8372 transitions. [2022-03-03 20:16:53,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:16:53,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:53,294 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:16:53,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-03 20:16:53,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:53,494 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:16:53,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:53,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1503265304, now seen corresponding path program 16 times [2022-03-03 20:16:53,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:53,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205191537] [2022-03-03 20:16:53,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:53,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:53,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:53,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205191537] [2022-03-03 20:16:53,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205191537] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:53,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867517140] [2022-03-03 20:16:53,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:16:53,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:53,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:53,707 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:53,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-03 20:16:53,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:16:53,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:53,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:16:53,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:54,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:16:54,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:54,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-03-03 20:16:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:54,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:54,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:54,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:54,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-03-03 20:16:54,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:54,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:54,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:54,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:16:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:54,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867517140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:54,668 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:54,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:16:54,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554602972] [2022-03-03 20:16:54,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:54,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:16:54,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:54,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:16:54,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:16:54,669 INFO L87 Difference]: Start difference. First operand 2308 states and 8372 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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) [2022-03-03 20:16:57,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:16:57,528 INFO L93 Difference]: Finished difference Result 5384 states and 17521 transitions. [2022-03-03 20:16:57,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-03 20:16:57,528 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:16:57,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:16:57,537 INFO L225 Difference]: With dead ends: 5384 [2022-03-03 20:16:57,537 INFO L226 Difference]: Without dead ends: 5369 [2022-03-03 20:16:57,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1126, Invalid=4130, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 20:16:57,538 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 476 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:16:57,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 425 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1566 Invalid, 0 Unknown, 269 Unchecked, 0.8s Time] [2022-03-03 20:16:57,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5369 states. [2022-03-03 20:16:57,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5369 to 2294. [2022-03-03 20:16:57,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 2293 states have (on average 3.6240732664631485) internal successors, (8310), 2293 states have internal predecessors, (8310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:16:57,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 8310 transitions. [2022-03-03 20:16:57,600 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 8310 transitions. Word has length 26 [2022-03-03 20:16:57,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:16:57,601 INFO L470 AbstractCegarLoop]: Abstraction has 2294 states and 8310 transitions. [2022-03-03 20:16:57,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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) [2022-03-03 20:16:57,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 8310 transitions. [2022-03-03 20:16:57,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:16:57,604 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:16:57,604 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:16:57,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-03 20:16:57,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-03 20:16:57,804 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:16:57,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:16:57,805 INFO L85 PathProgramCache]: Analyzing trace with hash -705646396, now seen corresponding path program 17 times [2022-03-03 20:16:57,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:16:57,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271141625] [2022-03-03 20:16:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:16:57,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:16:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:16:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:58,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:16:58,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271141625] [2022-03-03 20:16:58,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271141625] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:16:58,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657356795] [2022-03-03 20:16:58,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:16:58,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:16:58,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:16:58,048 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:16:58,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-03 20:16:58,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:16:58,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:16:58,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:16:58,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:16:58,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:16:58,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:58,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-03 20:16:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:58,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:16:58,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:58,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:58,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-03-03 20:16:58,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:58,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:16:58,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:16:58,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:16:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:16:59,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657356795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:16:59,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:16:59,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 20:16:59,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847664143] [2022-03-03 20:16:59,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:16:59,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:16:59,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:16:59,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:16:59,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:16:59,108 INFO L87 Difference]: Start difference. First operand 2294 states and 8310 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:03,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:03,910 INFO L93 Difference]: Finished difference Result 4714 states and 15312 transitions. [2022-03-03 20:17:03,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-03 20:17:03,911 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:17:03,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:03,935 INFO L225 Difference]: With dead ends: 4714 [2022-03-03 20:17:03,935 INFO L226 Difference]: Without dead ends: 4651 [2022-03-03 20:17:03,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3164 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1261, Invalid=8639, Unknown=0, NotChecked=0, Total=9900 [2022-03-03 20:17:03,936 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 467 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 2100 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:03,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 549 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2100 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 20:17:03,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2022-03-03 20:17:03,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 2420. [2022-03-03 20:17:03,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 2419 states have (on average 3.6143034311699047) internal successors, (8743), 2419 states have internal predecessors, (8743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:03,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 8743 transitions. [2022-03-03 20:17:03,982 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 8743 transitions. Word has length 26 [2022-03-03 20:17:03,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:03,982 INFO L470 AbstractCegarLoop]: Abstraction has 2420 states and 8743 transitions. [2022-03-03 20:17:03,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:03,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 8743 transitions. [2022-03-03 20:17:03,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:03,986 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:03,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:04,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-03 20:17:04,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-03 20:17:04,186 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:04,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:04,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1190773488, now seen corresponding path program 18 times [2022-03-03 20:17:04,187 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:04,187 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783370705] [2022-03-03 20:17:04,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:04,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:04,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:04,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783370705] [2022-03-03 20:17:04,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783370705] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:04,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823793190] [2022-03-03 20:17:04,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:17:04,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:04,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:04,436 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:04,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-03 20:17:04,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:17:04,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:04,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:17:04,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:04,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:04,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:04,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-03-03 20:17:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:04,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:05,036 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:17:05,036 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 21 treesize of output 56 [2022-03-03 20:17:05,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:05,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:05,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:05,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:17:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:05,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823793190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:05,426 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:05,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-03 20:17:05,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157779610] [2022-03-03 20:17:05,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:05,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:17:05,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:05,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:17:05,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:17:05,427 INFO L87 Difference]: Start difference. First operand 2420 states and 8743 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:08,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:08,283 INFO L93 Difference]: Finished difference Result 4407 states and 14743 transitions. [2022-03-03 20:17:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 20:17:08,283 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:17:08,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:08,292 INFO L225 Difference]: With dead ends: 4407 [2022-03-03 20:17:08,292 INFO L226 Difference]: Without dead ends: 4377 [2022-03-03 20:17:08,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=663, Invalid=4307, Unknown=0, NotChecked=0, Total=4970 [2022-03-03 20:17:08,293 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 274 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 2190 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:08,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 467 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2190 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 20:17:08,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4377 states. [2022-03-03 20:17:08,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4377 to 2375. [2022-03-03 20:17:08,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2375 states, 2374 states have (on average 3.608677337826453) internal successors, (8567), 2374 states have internal predecessors, (8567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:08,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2375 states to 2375 states and 8567 transitions. [2022-03-03 20:17:08,381 INFO L78 Accepts]: Start accepts. Automaton has 2375 states and 8567 transitions. Word has length 26 [2022-03-03 20:17:08,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:08,381 INFO L470 AbstractCegarLoop]: Abstraction has 2375 states and 8567 transitions. [2022-03-03 20:17:08,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:08,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2375 states and 8567 transitions. [2022-03-03 20:17:08,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:08,387 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:08,387 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:08,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-03 20:17:08,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:08,611 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:08,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:08,611 INFO L85 PathProgramCache]: Analyzing trace with hash -376486824, now seen corresponding path program 19 times [2022-03-03 20:17:08,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:08,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901894821] [2022-03-03 20:17:08,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:08,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:08,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:08,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901894821] [2022-03-03 20:17:08,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901894821] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:08,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633233209] [2022-03-03 20:17:08,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:17:08,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:08,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:08,844 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:08,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-03 20:17:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:08,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:17:08,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:09,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:09,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:09,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-03 20:17:09,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:09,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:09,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:09,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:09,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-03-03 20:17:09,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:09,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:09,651 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:09,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:17:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:09,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633233209] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:09,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:09,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:17:09,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689944759] [2022-03-03 20:17:09,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:09,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:17:09,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:09,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:17:09,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:17:09,879 INFO L87 Difference]: Start difference. First operand 2375 states and 8567 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:12,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:12,179 INFO L93 Difference]: Finished difference Result 4514 states and 14946 transitions. [2022-03-03 20:17:12,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 20:17:12,179 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:17:12,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:12,188 INFO L225 Difference]: With dead ends: 4514 [2022-03-03 20:17:12,188 INFO L226 Difference]: Without dead ends: 4451 [2022-03-03 20:17:12,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=686, Invalid=3096, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 20:17:12,189 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 414 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:12,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 289 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 20:17:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2022-03-03 20:17:12,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 2441. [2022-03-03 20:17:12,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 3.6176229508196722) internal successors, (8827), 2440 states have internal predecessors, (8827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:12,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 8827 transitions. [2022-03-03 20:17:12,236 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 8827 transitions. Word has length 26 [2022-03-03 20:17:12,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:12,236 INFO L470 AbstractCegarLoop]: Abstraction has 2441 states and 8827 transitions. [2022-03-03 20:17:12,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:12,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 8827 transitions. [2022-03-03 20:17:12,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:12,240 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:12,240 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:12,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-03 20:17:12,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:12,442 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:12,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:12,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1635493100, now seen corresponding path program 20 times [2022-03-03 20:17:12,442 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:12,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733772373] [2022-03-03 20:17:12,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:12,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:12,671 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:12,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733772373] [2022-03-03 20:17:12,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733772373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:12,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223918635] [2022-03-03 20:17:12,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:17:12,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:12,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:12,676 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:12,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-03 20:17:12,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:17:12,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:12,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:17:12,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:13,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:13,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:13,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-03-03 20:17:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:13,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:13,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:13,473 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 38 treesize of output 71 [2022-03-03 20:17:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:14,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223918635] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:14,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:14,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:17:14,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217785161] [2022-03-03 20:17:14,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:14,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:17:14,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:14,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:17:14,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:17:14,422 INFO L87 Difference]: Start difference. First operand 2441 states and 8827 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:17,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:17,943 INFO L93 Difference]: Finished difference Result 5089 states and 16612 transitions. [2022-03-03 20:17:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-03 20:17:17,943 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:17:17,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:17,953 INFO L225 Difference]: With dead ends: 5089 [2022-03-03 20:17:17,953 INFO L226 Difference]: Without dead ends: 5021 [2022-03-03 20:17:17,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1091, Invalid=4311, Unknown=0, NotChecked=0, Total=5402 [2022-03-03 20:17:17,953 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 486 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:17,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 417 Invalid, 1712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1090 Invalid, 0 Unknown, 519 Unchecked, 0.6s Time] [2022-03-03 20:17:17,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5021 states. [2022-03-03 20:17:17,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5021 to 2432. [2022-03-03 20:17:17,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2431 states have (on average 3.6199095022624435) internal successors, (8800), 2431 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 8800 transitions. [2022-03-03 20:17:18,003 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 8800 transitions. Word has length 26 [2022-03-03 20:17:18,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:18,004 INFO L470 AbstractCegarLoop]: Abstraction has 2432 states and 8800 transitions. [2022-03-03 20:17:18,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:18,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 8800 transitions. [2022-03-03 20:17:18,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:18,007 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:18,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:18,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-03 20:17:18,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:18,208 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:18,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:18,208 INFO L85 PathProgramCache]: Analyzing trace with hash -913979680, now seen corresponding path program 21 times [2022-03-03 20:17:18,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:18,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238412065] [2022-03-03 20:17:18,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:18,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:18,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:18,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238412065] [2022-03-03 20:17:18,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238412065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:18,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803341317] [2022-03-03 20:17:18,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:17:18,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:18,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:18,426 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:18,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-03 20:17:18,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:17:18,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:18,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:17:18,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:18,785 INFO L353 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2022-03-03 20:17:18,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 77 [2022-03-03 20:17:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:18,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:19,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:19,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:19,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:19,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 48 [2022-03-03 20:17:19,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:19,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-03-03 20:17:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:19,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803341317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:19,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:19,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2022-03-03 20:17:19,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451497938] [2022-03-03 20:17:19,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:19,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:17:19,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:19,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:17:19,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:17:19,376 INFO L87 Difference]: Start difference. First operand 2432 states and 8800 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:22,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:22,395 INFO L93 Difference]: Finished difference Result 4523 states and 15293 transitions. [2022-03-03 20:17:22,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 20:17:22,395 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:17:22,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:22,404 INFO L225 Difference]: With dead ends: 4523 [2022-03-03 20:17:22,404 INFO L226 Difference]: Without dead ends: 4460 [2022-03-03 20:17:22,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=739, Invalid=3817, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 20:17:22,404 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 371 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:22,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 333 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1700 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:17:22,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2022-03-03 20:17:22,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 2477. [2022-03-03 20:17:22,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 3.6163166397415187) internal successors, (8954), 2476 states have internal predecessors, (8954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:22,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 8954 transitions. [2022-03-03 20:17:22,447 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 8954 transitions. Word has length 26 [2022-03-03 20:17:22,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:22,448 INFO L470 AbstractCegarLoop]: Abstraction has 2477 states and 8954 transitions. [2022-03-03 20:17:22,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:22,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 8954 transitions. [2022-03-03 20:17:22,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:22,451 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:22,451 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:22,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-03 20:17:22,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-03 20:17:22,664 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:22,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:22,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2121981340, now seen corresponding path program 22 times [2022-03-03 20:17:22,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:22,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659995120] [2022-03-03 20:17:22,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:22,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:22,890 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:22,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659995120] [2022-03-03 20:17:22,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659995120] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:22,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288307336] [2022-03-03 20:17:22,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:17:22,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:22,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:22,892 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:22,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-03 20:17:22,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:17:22,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:22,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:17:22,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:23,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:23,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:23,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-03-03 20:17:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:23,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:23,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:23,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:23,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-03-03 20:17:23,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:23,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:23,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:23,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:17:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:23,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288307336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:23,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:23,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:17:23,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957137130] [2022-03-03 20:17:23,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:23,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:17:23,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:23,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:17:23,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:17:23,839 INFO L87 Difference]: Start difference. First operand 2477 states and 8954 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:26,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:26,997 INFO L93 Difference]: Finished difference Result 5345 states and 17184 transitions. [2022-03-03 20:17:26,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 20:17:26,997 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:17:26,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:27,006 INFO L225 Difference]: With dead ends: 5345 [2022-03-03 20:17:27,007 INFO L226 Difference]: Without dead ends: 5214 [2022-03-03 20:17:27,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1792 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1064, Invalid=4486, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 20:17:27,007 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 404 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:27,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 440 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1740 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:17:27,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5214 states. [2022-03-03 20:17:27,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5214 to 2604. [2022-03-03 20:17:27,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2604 states, 2603 states have (on average 3.606607760276604) internal successors, (9388), 2603 states have internal predecessors, (9388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:27,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 9388 transitions. [2022-03-03 20:17:27,060 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 9388 transitions. Word has length 26 [2022-03-03 20:17:27,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:27,060 INFO L470 AbstractCegarLoop]: Abstraction has 2604 states and 9388 transitions. [2022-03-03 20:17:27,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:27,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 9388 transitions. [2022-03-03 20:17:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:27,064 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:27,064 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:27,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-03 20:17:27,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-03 20:17:27,265 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:27,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:27,265 INFO L85 PathProgramCache]: Analyzing trace with hash 193303520, now seen corresponding path program 23 times [2022-03-03 20:17:27,265 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:27,265 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21298344] [2022-03-03 20:17:27,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:27,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:27,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:27,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21298344] [2022-03-03 20:17:27,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21298344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:27,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307020937] [2022-03-03 20:17:27,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:17:27,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:27,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:27,493 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:27,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-03 20:17:27,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 20:17:27,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:27,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:17:27,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:27,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:27,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:27,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-03 20:17:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:27,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:28,026 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:17:28,026 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 20 treesize of output 55 [2022-03-03 20:17:28,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:28,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:28,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:28,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:17:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:28,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307020937] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:28,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:28,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 20:17:28,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963090968] [2022-03-03 20:17:28,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:28,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 20:17:28,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:28,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 20:17:28,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-03-03 20:17:28,435 INFO L87 Difference]: Start difference. First operand 2604 states and 9388 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:29,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:29,434 INFO L93 Difference]: Finished difference Result 3796 states and 12810 transitions. [2022-03-03 20:17:29,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 20:17:29,434 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:17:29,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:29,442 INFO L225 Difference]: With dead ends: 3796 [2022-03-03 20:17:29,442 INFO L226 Difference]: Without dead ends: 3766 [2022-03-03 20:17:29,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 20:17:29,442 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 149 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:29,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 243 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1086 Invalid, 0 Unknown, 68 Unchecked, 0.5s Time] [2022-03-03 20:17:29,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3766 states. [2022-03-03 20:17:29,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3766 to 2614. [2022-03-03 20:17:29,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2614 states, 2613 states have (on average 3.6069651741293534) internal successors, (9425), 2613 states have internal predecessors, (9425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:29,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2614 states to 2614 states and 9425 transitions. [2022-03-03 20:17:29,486 INFO L78 Accepts]: Start accepts. Automaton has 2614 states and 9425 transitions. Word has length 26 [2022-03-03 20:17:29,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:29,486 INFO L470 AbstractCegarLoop]: Abstraction has 2614 states and 9425 transitions. [2022-03-03 20:17:29,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:29,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2614 states and 9425 transitions. [2022-03-03 20:17:29,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:29,489 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:29,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:29,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-03 20:17:29,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:29,690 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:29,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:29,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1764129120, now seen corresponding path program 24 times [2022-03-03 20:17:29,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:29,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618752223] [2022-03-03 20:17:29,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:29,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:29,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:29,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618752223] [2022-03-03 20:17:29,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618752223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:29,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78920464] [2022-03-03 20:17:29,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:17:29,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:29,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:29,895 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:29,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-03 20:17:29,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:17:29,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:29,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:17:29,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:30,179 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-03-03 20:17:30,179 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 63 [2022-03-03 20:17:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:30,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:30,487 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:17:30,488 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 21 treesize of output 56 [2022-03-03 20:17:30,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:30,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:30,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:30,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:17:30,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:30,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78920464] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:30,875 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:30,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-03 20:17:30,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703935323] [2022-03-03 20:17:30,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:30,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:17:30,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:30,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:17:30,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:17:30,876 INFO L87 Difference]: Start difference. First operand 2614 states and 9425 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:33,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:33,341 INFO L93 Difference]: Finished difference Result 4986 states and 16584 transitions. [2022-03-03 20:17:33,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 20:17:33,342 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:17:33,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:33,351 INFO L225 Difference]: With dead ends: 4986 [2022-03-03 20:17:33,351 INFO L226 Difference]: Without dead ends: 4891 [2022-03-03 20:17:33,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=788, Invalid=4468, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 20:17:33,352 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 380 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:33,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 310 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1491 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:17:33,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2022-03-03 20:17:33,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 2627. [2022-03-03 20:17:33,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 3.6085300837776084) internal successors, (9476), 2626 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:33,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 9476 transitions. [2022-03-03 20:17:33,418 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 9476 transitions. Word has length 26 [2022-03-03 20:17:33,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:33,418 INFO L470 AbstractCegarLoop]: Abstraction has 2627 states and 9476 transitions. [2022-03-03 20:17:33,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:33,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 9476 transitions. [2022-03-03 20:17:33,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:33,423 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:33,423 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:33,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-03 20:17:33,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:33,630 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:33,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:33,631 INFO L85 PathProgramCache]: Analyzing trace with hash -340731392, now seen corresponding path program 25 times [2022-03-03 20:17:33,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:33,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168741861] [2022-03-03 20:17:33,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:33,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:33,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:33,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168741861] [2022-03-03 20:17:33,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168741861] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:33,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300265764] [2022-03-03 20:17:33,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:17:33,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:33,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:33,890 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:33,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-03 20:17:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:33,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:17:33,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:34,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:34,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:34,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-03-03 20:17:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:34,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:34,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:34,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:34,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-03-03 20:17:34,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:34,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:34,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:34,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:17:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:34,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300265764] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:34,855 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:34,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:17:34,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097034266] [2022-03-03 20:17:34,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:34,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:17:34,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:34,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:17:34,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:17:34,856 INFO L87 Difference]: Start difference. First operand 2627 states and 9476 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:36,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:36,298 INFO L93 Difference]: Finished difference Result 4453 states and 14888 transitions. [2022-03-03 20:17:36,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 20:17:36,298 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:17:36,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:36,307 INFO L225 Difference]: With dead ends: 4453 [2022-03-03 20:17:36,307 INFO L226 Difference]: Without dead ends: 4413 [2022-03-03 20:17:36,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=603, Invalid=2589, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 20:17:36,308 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 342 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:36,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 236 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 716 Invalid, 0 Unknown, 176 Unchecked, 0.4s Time] [2022-03-03 20:17:36,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4413 states. [2022-03-03 20:17:36,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4413 to 2673. [2022-03-03 20:17:36,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2673 states, 2672 states have (on average 3.6096556886227544) internal successors, (9645), 2672 states have internal predecessors, (9645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:36,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2673 states to 2673 states and 9645 transitions. [2022-03-03 20:17:36,363 INFO L78 Accepts]: Start accepts. Automaton has 2673 states and 9645 transitions. Word has length 26 [2022-03-03 20:17:36,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:36,363 INFO L470 AbstractCegarLoop]: Abstraction has 2673 states and 9645 transitions. [2022-03-03 20:17:36,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:36,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2673 states and 9645 transitions. [2022-03-03 20:17:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:36,367 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:36,367 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:36,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-03 20:17:36,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:36,568 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:36,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:36,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1958264172, now seen corresponding path program 26 times [2022-03-03 20:17:36,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:36,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62513523] [2022-03-03 20:17:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:36,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:36,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:36,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62513523] [2022-03-03 20:17:36,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62513523] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:36,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429252940] [2022-03-03 20:17:36,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:17:36,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:36,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:36,773 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:36,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-03 20:17:36,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:17:36,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:36,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:17:36,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:37,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:37,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:37,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-03-03 20:17:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:37,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:37,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:37,384 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 38 treesize of output 71 [2022-03-03 20:17:38,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:38,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429252940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:38,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:38,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:17:38,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576081231] [2022-03-03 20:17:38,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:38,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:17:38,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:38,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:17:38,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:17:38,199 INFO L87 Difference]: Start difference. First operand 2673 states and 9645 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:41,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:41,615 INFO L93 Difference]: Finished difference Result 4963 states and 16602 transitions. [2022-03-03 20:17:41,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 20:17:41,615 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:17:41,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:41,625 INFO L225 Difference]: With dead ends: 4963 [2022-03-03 20:17:41,625 INFO L226 Difference]: Without dead ends: 4919 [2022-03-03 20:17:41,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1193, Invalid=4659, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 20:17:41,626 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 473 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:41,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 303 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 916 Invalid, 0 Unknown, 173 Unchecked, 0.6s Time] [2022-03-03 20:17:41,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4919 states. [2022-03-03 20:17:41,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4919 to 2690. [2022-03-03 20:17:41,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2690 states, 2689 states have (on average 3.6106359241353663) internal successors, (9709), 2689 states have internal predecessors, (9709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:41,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2690 states to 2690 states and 9709 transitions. [2022-03-03 20:17:41,694 INFO L78 Accepts]: Start accepts. Automaton has 2690 states and 9709 transitions. Word has length 26 [2022-03-03 20:17:41,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:41,694 INFO L470 AbstractCegarLoop]: Abstraction has 2690 states and 9709 transitions. [2022-03-03 20:17:41,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:41,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2690 states and 9709 transitions. [2022-03-03 20:17:41,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:41,699 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:41,699 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:41,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-03 20:17:41,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:41,899 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:41,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:41,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1158422128, now seen corresponding path program 27 times [2022-03-03 20:17:41,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:41,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288643521] [2022-03-03 20:17:41,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:41,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:42,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:42,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288643521] [2022-03-03 20:17:42,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288643521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:42,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065089332] [2022-03-03 20:17:42,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:17:42,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:42,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:42,105 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:42,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-03 20:17:42,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:17:42,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:42,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:17:42,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:42,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:42,405 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:42,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-03-03 20:17:42,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:42,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:42,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:42,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:42,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-03-03 20:17:42,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:42,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:42,813 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:42,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:17:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:43,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065089332] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:43,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:43,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:17:43,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529418701] [2022-03-03 20:17:43,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:43,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:17:43,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:43,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:17:43,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:17:43,053 INFO L87 Difference]: Start difference. First operand 2690 states and 9709 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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) [2022-03-03 20:17:45,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:45,479 INFO L93 Difference]: Finished difference Result 5009 states and 16652 transitions. [2022-03-03 20:17:45,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 20:17:45,480 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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 26 [2022-03-03 20:17:45,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:45,489 INFO L225 Difference]: With dead ends: 5009 [2022-03-03 20:17:45,489 INFO L226 Difference]: Without dead ends: 4969 [2022-03-03 20:17:45,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=964, Invalid=3728, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 20:17:45,490 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 414 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:45,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 332 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1016 Invalid, 0 Unknown, 167 Unchecked, 0.5s Time] [2022-03-03 20:17:45,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4969 states. [2022-03-03 20:17:45,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4969 to 2690. [2022-03-03 20:17:45,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2690 states, 2689 states have (on average 3.611751580513202) internal successors, (9712), 2689 states have internal predecessors, (9712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:45,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2690 states to 2690 states and 9712 transitions. [2022-03-03 20:17:45,567 INFO L78 Accepts]: Start accepts. Automaton has 2690 states and 9712 transitions. Word has length 26 [2022-03-03 20:17:45,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:45,567 INFO L470 AbstractCegarLoop]: Abstraction has 2690 states and 9712 transitions. [2022-03-03 20:17:45,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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) [2022-03-03 20:17:45,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2690 states and 9712 transitions. [2022-03-03 20:17:45,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:45,571 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:45,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:45,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-03 20:17:45,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-03 20:17:45,771 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:45,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:45,772 INFO L85 PathProgramCache]: Analyzing trace with hash 646760220, now seen corresponding path program 28 times [2022-03-03 20:17:45,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:45,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643105344] [2022-03-03 20:17:45,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:45,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:45,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:45,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643105344] [2022-03-03 20:17:45,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643105344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:45,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293453343] [2022-03-03 20:17:45,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:17:45,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:45,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:45,988 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:46,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-03 20:17:46,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:17:46,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:46,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:17:46,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:46,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:46,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:46,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-03-03 20:17:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:46,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:46,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:46,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:46,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 55 [2022-03-03 20:17:46,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:46,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:46,764 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:46,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:17:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:47,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293453343] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:47,009 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:47,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 20:17:47,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549260575] [2022-03-03 20:17:47,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:47,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:17:47,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:47,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:17:47,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:17:47,010 INFO L87 Difference]: Start difference. First operand 2690 states and 9712 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:48,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:48,795 INFO L93 Difference]: Finished difference Result 4644 states and 15587 transitions. [2022-03-03 20:17:48,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 20:17:48,796 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:17:48,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:48,804 INFO L225 Difference]: With dead ends: 4644 [2022-03-03 20:17:48,804 INFO L226 Difference]: Without dead ends: 4579 [2022-03-03 20:17:48,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=672, Invalid=2750, Unknown=0, NotChecked=0, Total=3422 [2022-03-03 20:17:48,804 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 429 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:48,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 246 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 873 Invalid, 0 Unknown, 115 Unchecked, 0.5s Time] [2022-03-03 20:17:48,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2022-03-03 20:17:48,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 2697. [2022-03-03 20:17:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2697 states, 2696 states have (on average 3.615727002967359) internal successors, (9748), 2696 states have internal predecessors, (9748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 9748 transitions. [2022-03-03 20:17:48,853 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 9748 transitions. Word has length 26 [2022-03-03 20:17:48,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:48,853 INFO L470 AbstractCegarLoop]: Abstraction has 2697 states and 9748 transitions. [2022-03-03 20:17:48,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:48,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 9748 transitions. [2022-03-03 20:17:48,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:48,857 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:48,857 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:48,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-03 20:17:49,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:49,057 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:49,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:49,058 INFO L85 PathProgramCache]: Analyzing trace with hash -599960430, now seen corresponding path program 29 times [2022-03-03 20:17:49,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:49,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555923679] [2022-03-03 20:17:49,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:49,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:49,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:49,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555923679] [2022-03-03 20:17:49,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555923679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:49,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010027745] [2022-03-03 20:17:49,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:17:49,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:49,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:49,299 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:49,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-03 20:17:49,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 20:17:49,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:49,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:17:49,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:49,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:49,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:49,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-03 20:17:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:49,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:49,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:49,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-03-03 20:17:49,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 6 [2022-03-03 20:17:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:50,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010027745] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:50,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:50,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2022-03-03 20:17:50,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915944081] [2022-03-03 20:17:50,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:50,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:17:50,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:50,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:17:50,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:17:50,004 INFO L87 Difference]: Start difference. First operand 2697 states and 9748 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:51,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:51,472 INFO L93 Difference]: Finished difference Result 4289 states and 14868 transitions. [2022-03-03 20:17:51,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 20:17:51,472 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:17:51,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:51,480 INFO L225 Difference]: With dead ends: 4289 [2022-03-03 20:17:51,480 INFO L226 Difference]: Without dead ends: 4267 [2022-03-03 20:17:51,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=589, Invalid=2833, Unknown=0, NotChecked=0, Total=3422 [2022-03-03 20:17:51,481 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 241 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 684 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:51,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 299 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 763 Invalid, 0 Unknown, 684 Unchecked, 0.4s Time] [2022-03-03 20:17:51,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4267 states. [2022-03-03 20:17:51,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4267 to 2721. [2022-03-03 20:17:51,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2721 states, 2720 states have (on average 3.6121323529411766) internal successors, (9825), 2720 states have internal predecessors, (9825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 9825 transitions. [2022-03-03 20:17:51,525 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 9825 transitions. Word has length 26 [2022-03-03 20:17:51,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:51,525 INFO L470 AbstractCegarLoop]: Abstraction has 2721 states and 9825 transitions. [2022-03-03 20:17:51,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:51,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 9825 transitions. [2022-03-03 20:17:51,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:51,529 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:51,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:51,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-03 20:17:51,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-03 20:17:51,747 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:51,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:51,747 INFO L85 PathProgramCache]: Analyzing trace with hash 179145086, now seen corresponding path program 30 times [2022-03-03 20:17:51,747 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:51,747 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779666707] [2022-03-03 20:17:51,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:51,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:51,990 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:51,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779666707] [2022-03-03 20:17:51,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779666707] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:51,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850046552] [2022-03-03 20:17:51,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:17:51,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:51,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:51,991 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:51,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-03 20:17:52,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:17:52,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:17:52,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:17:52,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:52,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:52,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:52,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-03-03 20:17:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:52,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:52,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:52,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:52,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-03-03 20:17:52,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:52,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:52,764 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:52,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:17:53,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:53,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850046552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:53,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:53,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:17:53,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698217497] [2022-03-03 20:17:53,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:53,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:17:53,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:53,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:17:53,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:17:53,003 INFO L87 Difference]: Start difference. First operand 2721 states and 9825 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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) [2022-03-03 20:17:55,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:55,419 INFO L93 Difference]: Finished difference Result 5079 states and 16896 transitions. [2022-03-03 20:17:55,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 20:17:55,420 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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 26 [2022-03-03 20:17:55,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:55,430 INFO L225 Difference]: With dead ends: 5079 [2022-03-03 20:17:55,430 INFO L226 Difference]: Without dead ends: 5064 [2022-03-03 20:17:55,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1584 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=961, Invalid=3731, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 20:17:55,430 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 429 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:55,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 341 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 965 Invalid, 0 Unknown, 202 Unchecked, 0.5s Time] [2022-03-03 20:17:55,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2022-03-03 20:17:55,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 2727. [2022-03-03 20:17:55,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 3.611885546588408) internal successors, (9846), 2726 states have internal predecessors, (9846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:55,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 9846 transitions. [2022-03-03 20:17:55,515 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 9846 transitions. Word has length 26 [2022-03-03 20:17:55,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:55,515 INFO L470 AbstractCegarLoop]: Abstraction has 2727 states and 9846 transitions. [2022-03-03 20:17:55,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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) [2022-03-03 20:17:55,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 9846 transitions. [2022-03-03 20:17:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:55,519 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:55,519 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:55,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-03 20:17:55,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-03 20:17:55,720 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:55,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:55,720 INFO L85 PathProgramCache]: Analyzing trace with hash -706653194, now seen corresponding path program 31 times [2022-03-03 20:17:55,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:55,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485790252] [2022-03-03 20:17:55,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:55,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:55,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:55,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485790252] [2022-03-03 20:17:55,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485790252] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:55,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001836442] [2022-03-03 20:17:55,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:17:55,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:55,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:55,917 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:55,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-03 20:17:55,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:55,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:17:55,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:56,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:56,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:56,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-03-03 20:17:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:56,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:56,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:56,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:56,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 55 [2022-03-03 20:17:56,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:56,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:56,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:17:56,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:17:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:56,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001836442] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:17:56,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:17:56,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 20:17:56,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443746436] [2022-03-03 20:17:56,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:17:56,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:17:56,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:17:56,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:17:56,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:17:56,863 INFO L87 Difference]: Start difference. First operand 2727 states and 9846 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:58,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:17:58,697 INFO L93 Difference]: Finished difference Result 4598 states and 15470 transitions. [2022-03-03 20:17:58,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 20:17:58,697 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:17:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:17:58,706 INFO L225 Difference]: With dead ends: 4598 [2022-03-03 20:17:58,707 INFO L226 Difference]: Without dead ends: 4562 [2022-03-03 20:17:58,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=707, Invalid=2953, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 20:17:58,707 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 350 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:17:58,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 332 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 789 Invalid, 0 Unknown, 226 Unchecked, 0.4s Time] [2022-03-03 20:17:58,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4562 states. [2022-03-03 20:17:58,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4562 to 2727. [2022-03-03 20:17:58,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2726 states have (on average 3.611885546588408) internal successors, (9846), 2726 states have internal predecessors, (9846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:58,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 9846 transitions. [2022-03-03 20:17:58,769 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 9846 transitions. Word has length 26 [2022-03-03 20:17:58,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:17:58,769 INFO L470 AbstractCegarLoop]: Abstraction has 2727 states and 9846 transitions. [2022-03-03 20:17:58,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:17:58,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 9846 transitions. [2022-03-03 20:17:58,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:17:58,773 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:17:58,774 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:17:58,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-03 20:17:58,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-03 20:17:58,974 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:17:58,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:17:58,974 INFO L85 PathProgramCache]: Analyzing trace with hash 902763630, now seen corresponding path program 37 times [2022-03-03 20:17:58,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:17:58,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787081963] [2022-03-03 20:17:58,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:17:58,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:17:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:59,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:17:59,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787081963] [2022-03-03 20:17:59,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787081963] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:17:59,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647907980] [2022-03-03 20:17:59,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:17:59,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:17:59,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:17:59,304 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:17:59,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-03 20:17:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:17:59,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:17:59,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:17:59,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:59,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:17:59,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:59,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:17:59,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-03-03 20:17:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:17:59,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:17:59,828 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:17:59,828 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 22 treesize of output 47 [2022-03-03 20:18:00,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:00,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647907980] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:00,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:00,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-03 20:18:00,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92169585] [2022-03-03 20:18:00,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:00,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:18:00,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:00,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:18:00,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:18:00,066 INFO L87 Difference]: Start difference. First operand 2727 states and 9846 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 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) [2022-03-03 20:18:01,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:01,966 INFO L93 Difference]: Finished difference Result 4463 states and 15278 transitions. [2022-03-03 20:18:01,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 20:18:01,966 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 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 26 [2022-03-03 20:18:01,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:01,975 INFO L225 Difference]: With dead ends: 4463 [2022-03-03 20:18:01,975 INFO L226 Difference]: Without dead ends: 4433 [2022-03-03 20:18:01,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=629, Invalid=3661, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 20:18:01,976 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 253 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:01,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 302 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:18:01,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4433 states. [2022-03-03 20:18:02,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4433 to 2753. [2022-03-03 20:18:02,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 3.6071947674418605) internal successors, (9927), 2752 states have internal predecessors, (9927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:02,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 9927 transitions. [2022-03-03 20:18:02,025 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 9927 transitions. Word has length 26 [2022-03-03 20:18:02,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:02,025 INFO L470 AbstractCegarLoop]: Abstraction has 2753 states and 9927 transitions. [2022-03-03 20:18:02,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 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) [2022-03-03 20:18:02,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 9927 transitions. [2022-03-03 20:18:02,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:18:02,029 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:02,029 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:02,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:02,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-03 20:18:02,243 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:18:02,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:02,244 INFO L85 PathProgramCache]: Analyzing trace with hash 2020528988, now seen corresponding path program 38 times [2022-03-03 20:18:02,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:02,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330753501] [2022-03-03 20:18:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:02,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:02,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:02,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330753501] [2022-03-03 20:18:02,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330753501] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:02,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78124731] [2022-03-03 20:18:02,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:18:02,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:02,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:02,558 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:18:02,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-03 20:18:02,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:18:02,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:02,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:18:02,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:02,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:18:02,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:18:02,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:18:02,871 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:18:02,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-03-03 20:18:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:02,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:03,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:03,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:18:03,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:03,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:18:03,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-03 20:18:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:03,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78124731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:03,279 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:03,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2022-03-03 20:18:03,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902789549] [2022-03-03 20:18:03,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:03,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:18:03,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:03,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:18:03,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:18:03,280 INFO L87 Difference]: Start difference. First operand 2753 states and 9927 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:05,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:05,933 INFO L93 Difference]: Finished difference Result 4917 states and 16637 transitions. [2022-03-03 20:18:05,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-03 20:18:05,934 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:18:05,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:05,943 INFO L225 Difference]: With dead ends: 4917 [2022-03-03 20:18:05,943 INFO L226 Difference]: Without dead ends: 4792 [2022-03-03 20:18:05,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=892, Invalid=5270, Unknown=0, NotChecked=0, Total=6162 [2022-03-03 20:18:05,944 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 377 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 395 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:05,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 385 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1488 Invalid, 0 Unknown, 395 Unchecked, 0.7s Time] [2022-03-03 20:18:05,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4792 states. [2022-03-03 20:18:05,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4792 to 2837. [2022-03-03 20:18:06,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2837 states, 2836 states have (on average 3.597672778561354) internal successors, (10203), 2836 states have internal predecessors, (10203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 10203 transitions. [2022-03-03 20:18:06,009 INFO L78 Accepts]: Start accepts. Automaton has 2837 states and 10203 transitions. Word has length 26 [2022-03-03 20:18:06,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:06,009 INFO L470 AbstractCegarLoop]: Abstraction has 2837 states and 10203 transitions. [2022-03-03 20:18:06,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:06,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2837 states and 10203 transitions. [2022-03-03 20:18:06,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:18:06,014 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:06,014 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:06,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-03 20:18:06,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:06,214 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:18:06,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:06,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1206563744, now seen corresponding path program 39 times [2022-03-03 20:18:06,215 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:06,215 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482675514] [2022-03-03 20:18:06,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:06,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:06,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:06,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:06,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482675514] [2022-03-03 20:18:06,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482675514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:06,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255143427] [2022-03-03 20:18:06,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:18:06,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:06,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:06,512 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:18:06,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-03 20:18:06,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:18:06,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:06,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 20:18:06,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:06,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:18:06,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:06,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:18:06,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 34 [2022-03-03 20:18:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:07,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:07,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:07,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:18:07,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:18:07,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 29 [2022-03-03 20:18:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:07,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255143427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:07,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:07,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2022-03-03 20:18:07,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332366941] [2022-03-03 20:18:07,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:07,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 20:18:07,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:07,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 20:18:07,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 20:18:07,662 INFO L87 Difference]: Start difference. First operand 2837 states and 10203 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:10,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:10,210 INFO L93 Difference]: Finished difference Result 4864 states and 16873 transitions. [2022-03-03 20:18:10,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 20:18:10,210 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:18:10,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:10,220 INFO L225 Difference]: With dead ends: 4864 [2022-03-03 20:18:10,220 INFO L226 Difference]: Without dead ends: 4834 [2022-03-03 20:18:10,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2205 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1018, Invalid=6292, Unknown=0, NotChecked=0, Total=7310 [2022-03-03 20:18:10,221 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 282 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 788 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:10,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 521 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 898 Invalid, 0 Unknown, 788 Unchecked, 0.4s Time] [2022-03-03 20:18:10,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4834 states. [2022-03-03 20:18:10,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4834 to 2870. [2022-03-03 20:18:10,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2869 states have (on average 3.590449634018822) internal successors, (10301), 2869 states have internal predecessors, (10301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:10,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 10301 transitions. [2022-03-03 20:18:10,273 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 10301 transitions. Word has length 26 [2022-03-03 20:18:10,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:10,273 INFO L470 AbstractCegarLoop]: Abstraction has 2870 states and 10301 transitions. [2022-03-03 20:18:10,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:10,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 10301 transitions. [2022-03-03 20:18:10,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:18:10,277 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:10,277 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:10,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-03 20:18:10,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:10,486 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:18:10,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:10,486 INFO L85 PathProgramCache]: Analyzing trace with hash 267653912, now seen corresponding path program 40 times [2022-03-03 20:18:10,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:10,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792042138] [2022-03-03 20:18:10,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:10,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:10,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:10,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792042138] [2022-03-03 20:18:10,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792042138] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:10,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132133014] [2022-03-03 20:18:10,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:18:10,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:10,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:10,754 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:18:10,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-03 20:18:10,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:18:10,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:10,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:18:10,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:11,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:18:11,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:11,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:18:11,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:11,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-03-03 20:18:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:11,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:11,197 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:18:11,197 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 22 treesize of output 47 [2022-03-03 20:18:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:11,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132133014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:11,345 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:11,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-03 20:18:11,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716674269] [2022-03-03 20:18:11,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:11,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:18:11,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:11,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:18:11,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:18:11,346 INFO L87 Difference]: Start difference. First operand 2870 states and 10301 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:13,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:13,827 INFO L93 Difference]: Finished difference Result 4716 states and 15993 transitions. [2022-03-03 20:18:13,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 20:18:13,828 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:18:13,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:13,837 INFO L225 Difference]: With dead ends: 4716 [2022-03-03 20:18:13,837 INFO L226 Difference]: Without dead ends: 4686 [2022-03-03 20:18:13,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=800, Invalid=5206, Unknown=0, NotChecked=0, Total=6006 [2022-03-03 20:18:13,838 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 243 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 1899 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 2049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:13,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 510 Invalid, 2049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1899 Invalid, 0 Unknown, 77 Unchecked, 0.8s Time] [2022-03-03 20:18:13,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2022-03-03 20:18:13,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 2898. [2022-03-03 20:18:13,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2898 states, 2897 states have (on average 3.5833620987228167) internal successors, (10381), 2897 states have internal predecessors, (10381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:13,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2898 states to 2898 states and 10381 transitions. [2022-03-03 20:18:13,890 INFO L78 Accepts]: Start accepts. Automaton has 2898 states and 10381 transitions. Word has length 26 [2022-03-03 20:18:13,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:13,890 INFO L470 AbstractCegarLoop]: Abstraction has 2898 states and 10381 transitions. [2022-03-03 20:18:13,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:13,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2898 states and 10381 transitions. [2022-03-03 20:18:13,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:18:13,894 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:13,894 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:13,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-03 20:18:14,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:14,095 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:18:14,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:14,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1794939168, now seen corresponding path program 32 times [2022-03-03 20:18:14,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:14,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480155083] [2022-03-03 20:18:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:14,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:14,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:14,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480155083] [2022-03-03 20:18:14,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480155083] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:14,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613673198] [2022-03-03 20:18:14,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:18:14,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:14,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:14,328 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:18:14,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-03 20:18:14,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:18:14,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:14,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:18:14,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:14,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:18:14,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:18:14,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-03-03 20:18:14,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:14,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:14,885 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:18:14,885 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 21 treesize of output 56 [2022-03-03 20:18:15,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:15,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:15,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:18:15,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:18:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:15,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613673198] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:15,279 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:15,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-03 20:18:15,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384304410] [2022-03-03 20:18:15,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:15,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:18:15,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:15,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:18:15,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:18:15,280 INFO L87 Difference]: Start difference. First operand 2898 states and 10381 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:19,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:19,759 INFO L93 Difference]: Finished difference Result 5777 states and 18905 transitions. [2022-03-03 20:18:19,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-03 20:18:19,759 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:18:19,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:19,771 INFO L225 Difference]: With dead ends: 5777 [2022-03-03 20:18:19,771 INFO L226 Difference]: Without dead ends: 5739 [2022-03-03 20:18:19,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2917 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1257, Invalid=7299, Unknown=0, NotChecked=0, Total=8556 [2022-03-03 20:18:19,771 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 546 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 1778 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:19,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 409 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1778 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 20:18:19,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5739 states. [2022-03-03 20:18:19,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5739 to 2916. [2022-03-03 20:18:19,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 3.585591766723842) internal successors, (10452), 2915 states have internal predecessors, (10452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:19,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 10452 transitions. [2022-03-03 20:18:19,834 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 10452 transitions. Word has length 26 [2022-03-03 20:18:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:19,835 INFO L470 AbstractCegarLoop]: Abstraction has 2916 states and 10452 transitions. [2022-03-03 20:18:19,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 10452 transitions. [2022-03-03 20:18:19,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:18:19,839 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:19,839 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:19,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-03 20:18:20,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-03-03 20:18:20,039 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:18:20,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:20,040 INFO L85 PathProgramCache]: Analyzing trace with hash -18564080, now seen corresponding path program 41 times [2022-03-03 20:18:20,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:20,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647227531] [2022-03-03 20:18:20,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:20,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:20,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:20,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647227531] [2022-03-03 20:18:20,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647227531] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:20,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776608362] [2022-03-03 20:18:20,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:18:20,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:20,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:20,285 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:18:20,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-03 20:18:20,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:18:20,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:20,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:18:20,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:20,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:18:20,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:20,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:18:20,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:20,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-03-03 20:18:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:20,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:20,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:20,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:20,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:20,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:18:20,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-03-03 20:18:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:20,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776608362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:20,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:20,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2022-03-03 20:18:20,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291783236] [2022-03-03 20:18:20,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:20,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:18:20,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:20,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:18:20,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:18:20,824 INFO L87 Difference]: Start difference. First operand 2916 states and 10452 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:24,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:24,006 INFO L93 Difference]: Finished difference Result 5484 states and 18435 transitions. [2022-03-03 20:18:24,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 20:18:24,006 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:18:24,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:24,017 INFO L225 Difference]: With dead ends: 5484 [2022-03-03 20:18:24,017 INFO L226 Difference]: Without dead ends: 5385 [2022-03-03 20:18:24,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1130, Invalid=5350, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 20:18:24,018 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 442 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:24,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 511 Invalid, 1948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1579 Invalid, 0 Unknown, 302 Unchecked, 0.8s Time] [2022-03-03 20:18:24,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5385 states. [2022-03-03 20:18:24,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5385 to 3032. [2022-03-03 20:18:24,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3032 states, 3031 states have (on average 3.5819861431870668) internal successors, (10857), 3031 states have internal predecessors, (10857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 10857 transitions. [2022-03-03 20:18:24,103 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 10857 transitions. Word has length 26 [2022-03-03 20:18:24,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:24,103 INFO L470 AbstractCegarLoop]: Abstraction has 3032 states and 10857 transitions. [2022-03-03 20:18:24,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:24,103 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 10857 transitions. [2022-03-03 20:18:24,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:18:24,108 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:24,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:24,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-03 20:18:24,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:24,308 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:18:24,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:24,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1815084572, now seen corresponding path program 42 times [2022-03-03 20:18:24,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:24,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074991139] [2022-03-03 20:18:24,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:24,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:24,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:24,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074991139] [2022-03-03 20:18:24,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074991139] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:24,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633841663] [2022-03-03 20:18:24,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:18:24,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:24,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:24,549 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:18:24,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-03 20:18:24,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:18:24,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:24,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:18:24,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:24,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:18:24,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:18:24,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:18:24,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-03-03 20:18:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:24,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:25,099 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:18:25,100 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 22 treesize of output 47 [2022-03-03 20:18:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:25,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633841663] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:25,238 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:25,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 26 [2022-03-03 20:18:25,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173577542] [2022-03-03 20:18:25,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:25,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:18:25,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:25,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:18:25,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:18:25,239 INFO L87 Difference]: Start difference. First operand 3032 states and 10857 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:34,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:34,258 INFO L93 Difference]: Finished difference Result 7691 states and 25281 transitions. [2022-03-03 20:18:34,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-03-03 20:18:34,259 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:18:34,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:34,273 INFO L225 Difference]: With dead ends: 7691 [2022-03-03 20:18:34,274 INFO L226 Difference]: Without dead ends: 7579 [2022-03-03 20:18:34,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11219 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=4357, Invalid=23365, Unknown=0, NotChecked=0, Total=27722 [2022-03-03 20:18:34,275 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 637 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 2490 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 2648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:34,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 720 Invalid, 2648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2490 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 20:18:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7579 states. [2022-03-03 20:18:34,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7579 to 3071. [2022-03-03 20:18:34,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3071 states, 3070 states have (on average 3.585342019543974) internal successors, (11007), 3070 states have internal predecessors, (11007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:34,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3071 states to 3071 states and 11007 transitions. [2022-03-03 20:18:34,352 INFO L78 Accepts]: Start accepts. Automaton has 3071 states and 11007 transitions. Word has length 26 [2022-03-03 20:18:34,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:34,352 INFO L470 AbstractCegarLoop]: Abstraction has 3071 states and 11007 transitions. [2022-03-03 20:18:34,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:34,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3071 states and 11007 transitions. [2022-03-03 20:18:34,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:18:34,357 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:34,357 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:34,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:34,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:34,557 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:18:34,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:34,558 INFO L85 PathProgramCache]: Analyzing trace with hash -629380028, now seen corresponding path program 33 times [2022-03-03 20:18:34,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:34,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564418101] [2022-03-03 20:18:34,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:34,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:34,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:34,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564418101] [2022-03-03 20:18:34,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564418101] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:34,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827522971] [2022-03-03 20:18:34,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:18:34,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:34,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:34,754 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:18:34,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-03 20:18:34,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:18:34,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:34,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:18:34,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:35,094 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:18:35,095 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 22 treesize of output 38 [2022-03-03 20:18:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:35,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:35,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:18:35,726 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 38 treesize of output 71 [2022-03-03 20:18:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:36,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827522971] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:36,357 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:36,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2022-03-03 20:18:36,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143551827] [2022-03-03 20:18:36,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:36,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:18:36,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:36,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:18:36,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:18:36,358 INFO L87 Difference]: Start difference. First operand 3071 states and 11007 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:38,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:38,886 INFO L93 Difference]: Finished difference Result 5427 states and 18637 transitions. [2022-03-03 20:18:38,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 20:18:38,887 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:18:38,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:38,897 INFO L225 Difference]: With dead ends: 5427 [2022-03-03 20:18:38,897 INFO L226 Difference]: Without dead ends: 5383 [2022-03-03 20:18:38,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=843, Invalid=3987, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 20:18:38,898 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 256 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 910 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:38,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 440 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1012 Invalid, 0 Unknown, 910 Unchecked, 0.6s Time] [2022-03-03 20:18:38,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5383 states. [2022-03-03 20:18:38,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5383 to 3067. [2022-03-03 20:18:38,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3067 states, 3066 states have (on average 3.5848010437051534) internal successors, (10991), 3066 states have internal predecessors, (10991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:38,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3067 states to 3067 states and 10991 transitions. [2022-03-03 20:18:38,954 INFO L78 Accepts]: Start accepts. Automaton has 3067 states and 10991 transitions. Word has length 26 [2022-03-03 20:18:38,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:38,954 INFO L470 AbstractCegarLoop]: Abstraction has 3067 states and 10991 transitions. [2022-03-03 20:18:38,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:38,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3067 states and 10991 transitions. [2022-03-03 20:18:38,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:18:38,958 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:38,958 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:38,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-03 20:18:39,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-03 20:18:39,159 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:18:39,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:39,159 INFO L85 PathProgramCache]: Analyzing trace with hash 2048054488, now seen corresponding path program 34 times [2022-03-03 20:18:39,159 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:39,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475823546] [2022-03-03 20:18:39,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:39,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:39,355 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:39,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475823546] [2022-03-03 20:18:39,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475823546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:39,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956999266] [2022-03-03 20:18:39,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:18:39,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:39,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:39,357 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:18:39,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-03 20:18:39,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:18:39,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:39,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:18:39,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:39,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:18:39,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:18:39,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-03 20:18:39,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:39,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:39,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:39,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:18:39,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-03-03 20:18:40,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:40,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:40,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:18:40,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:18:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:40,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956999266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:40,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:40,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:18:40,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674947225] [2022-03-03 20:18:40,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:40,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:18:40,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:40,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:18:40,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:18:40,231 INFO L87 Difference]: Start difference. First operand 3067 states and 10991 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:42,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:42,903 INFO L93 Difference]: Finished difference Result 6031 states and 19876 transitions. [2022-03-03 20:18:42,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 20:18:42,904 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:18:42,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:42,915 INFO L225 Difference]: With dead ends: 6031 [2022-03-03 20:18:42,915 INFO L226 Difference]: Without dead ends: 5977 [2022-03-03 20:18:42,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1940 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1154, Invalid=4396, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 20:18:42,916 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 559 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:42,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 403 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1182 Invalid, 0 Unknown, 280 Unchecked, 0.6s Time] [2022-03-03 20:18:42,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5977 states. [2022-03-03 20:18:42,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5977 to 3113. [2022-03-03 20:18:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3113 states, 3112 states have (on average 3.581298200514139) internal successors, (11145), 3112 states have internal predecessors, (11145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:42,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3113 states to 3113 states and 11145 transitions. [2022-03-03 20:18:42,996 INFO L78 Accepts]: Start accepts. Automaton has 3113 states and 11145 transitions. Word has length 26 [2022-03-03 20:18:42,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:42,997 INFO L470 AbstractCegarLoop]: Abstraction has 3113 states and 11145 transitions. [2022-03-03 20:18:42,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:42,997 INFO L276 IsEmpty]: Start isEmpty. Operand 3113 states and 11145 transitions. [2022-03-03 20:18:43,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:18:43,001 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:43,001 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:43,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-03 20:18:43,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-03 20:18:43,202 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:18:43,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:43,202 INFO L85 PathProgramCache]: Analyzing trace with hash 358111584, now seen corresponding path program 35 times [2022-03-03 20:18:43,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:43,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614507154] [2022-03-03 20:18:43,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:43,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:43,414 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:43,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614507154] [2022-03-03 20:18:43,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614507154] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:43,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569625669] [2022-03-03 20:18:43,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:18:43,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:43,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:43,415 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:18:43,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-03 20:18:43,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:18:43,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:43,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:18:43,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:43,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:18:43,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:18:43,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2022-03-03 20:18:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:43,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:44,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:18:44,003 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 37 treesize of output 70 [2022-03-03 20:18:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:44,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569625669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:44,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:44,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 20:18:44,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573237554] [2022-03-03 20:18:44,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:44,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:18:44,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:44,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:18:44,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:18:44,797 INFO L87 Difference]: Start difference. First operand 3113 states and 11145 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:47,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:47,767 INFO L93 Difference]: Finished difference Result 5565 states and 18570 transitions. [2022-03-03 20:18:47,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 20:18:47,767 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:18:47,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:47,777 INFO L225 Difference]: With dead ends: 5565 [2022-03-03 20:18:47,777 INFO L226 Difference]: Without dead ends: 5515 [2022-03-03 20:18:47,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1111, Invalid=4439, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 20:18:47,778 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 445 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:47,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 345 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 911 Invalid, 0 Unknown, 213 Unchecked, 0.5s Time] [2022-03-03 20:18:47,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5515 states. [2022-03-03 20:18:47,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5515 to 3125. [2022-03-03 20:18:47,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3125 states, 3124 states have (on average 3.5848271446862996) internal successors, (11199), 3124 states have internal predecessors, (11199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3125 states to 3125 states and 11199 transitions. [2022-03-03 20:18:47,851 INFO L78 Accepts]: Start accepts. Automaton has 3125 states and 11199 transitions. Word has length 26 [2022-03-03 20:18:47,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:47,851 INFO L470 AbstractCegarLoop]: Abstraction has 3125 states and 11199 transitions. [2022-03-03 20:18:47,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:47,851 INFO L276 IsEmpty]: Start isEmpty. Operand 3125 states and 11199 transitions. [2022-03-03 20:18:47,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:18:47,856 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:47,857 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:47,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-03 20:18:48,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:48,057 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:18:48,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:48,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1865146436, now seen corresponding path program 36 times [2022-03-03 20:18:48,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:48,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821569095] [2022-03-03 20:18:48,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:48,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:48,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:48,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821569095] [2022-03-03 20:18:48,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821569095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:48,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96062885] [2022-03-03 20:18:48,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:18:48,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:48,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:48,260 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:18:48,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-03 20:18:48,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:18:48,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:48,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:18:48,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:48,604 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-03-03 20:18:48,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 60 [2022-03-03 20:18:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:48,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:48,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:48,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:18:48,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-03-03 20:18:49,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:49,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:49,045 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:18:49,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:18:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:49,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96062885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:49,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:49,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-03-03 20:18:49,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989725527] [2022-03-03 20:18:49,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:49,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:18:49,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:49,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:18:49,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:18:49,290 INFO L87 Difference]: Start difference. First operand 3125 states and 11199 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:50,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:50,983 INFO L93 Difference]: Finished difference Result 5173 states and 17270 transitions. [2022-03-03 20:18:50,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 20:18:50,983 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:18:50,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:50,993 INFO L225 Difference]: With dead ends: 5173 [2022-03-03 20:18:50,993 INFO L226 Difference]: Without dead ends: 5158 [2022-03-03 20:18:50,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=585, Invalid=2837, Unknown=0, NotChecked=0, Total=3422 [2022-03-03 20:18:50,994 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 301 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 357 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:50,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 358 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 852 Invalid, 0 Unknown, 357 Unchecked, 0.5s Time] [2022-03-03 20:18:50,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2022-03-03 20:18:51,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 3154. [2022-03-03 20:18:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3154 states, 3153 states have (on average 3.587059942911513) internal successors, (11310), 3153 states have internal predecessors, (11310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:51,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3154 states to 3154 states and 11310 transitions. [2022-03-03 20:18:51,065 INFO L78 Accepts]: Start accepts. Automaton has 3154 states and 11310 transitions. Word has length 26 [2022-03-03 20:18:51,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:51,065 INFO L470 AbstractCegarLoop]: Abstraction has 3154 states and 11310 transitions. [2022-03-03 20:18:51,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:51,066 INFO L276 IsEmpty]: Start isEmpty. Operand 3154 states and 11310 transitions. [2022-03-03 20:18:51,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:18:51,070 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:51,070 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:51,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-03 20:18:51,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:51,271 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:18:51,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:51,271 INFO L85 PathProgramCache]: Analyzing trace with hash 2033699288, now seen corresponding path program 43 times [2022-03-03 20:18:51,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:51,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200974474] [2022-03-03 20:18:51,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:51,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:51,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:51,563 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:51,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200974474] [2022-03-03 20:18:51,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200974474] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:51,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764557188] [2022-03-03 20:18:51,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:18:51,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:51,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:51,564 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:18:51,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-03 20:18:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:51,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:18:51,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:51,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:18:51,900 INFO L353 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2022-03-03 20:18:51,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 113 treesize of output 99 [2022-03-03 20:18:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:52,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:52,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:52,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:52,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:52,257 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:18:52,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-03-03 20:18:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:52,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764557188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:52,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:52,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-03 20:18:52,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316594570] [2022-03-03 20:18:52,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:52,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 20:18:52,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:52,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 20:18:52,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2022-03-03 20:18:52,387 INFO L87 Difference]: Start difference. First operand 3154 states and 11310 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:18:55,358 INFO L93 Difference]: Finished difference Result 4979 states and 16970 transitions. [2022-03-03 20:18:55,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 20:18:55,359 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:18:55,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:18:55,368 INFO L225 Difference]: With dead ends: 4979 [2022-03-03 20:18:55,368 INFO L226 Difference]: Without dead ends: 4899 [2022-03-03 20:18:55,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2511 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1153, Invalid=6679, Unknown=0, NotChecked=0, Total=7832 [2022-03-03 20:18:55,369 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 291 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:18:55,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 453 Invalid, 1963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1699 Invalid, 0 Unknown, 222 Unchecked, 0.8s Time] [2022-03-03 20:18:55,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2022-03-03 20:18:55,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 3160. [2022-03-03 20:18:55,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3160 states, 3159 states have (on average 3.5875276986388096) internal successors, (11333), 3159 states have internal predecessors, (11333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:55,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3160 states to 3160 states and 11333 transitions. [2022-03-03 20:18:55,423 INFO L78 Accepts]: Start accepts. Automaton has 3160 states and 11333 transitions. Word has length 26 [2022-03-03 20:18:55,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:18:55,423 INFO L470 AbstractCegarLoop]: Abstraction has 3160 states and 11333 transitions. [2022-03-03 20:18:55,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:18:55,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3160 states and 11333 transitions. [2022-03-03 20:18:55,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:18:55,429 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:18:55,429 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:18:55,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-03 20:18:55,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:55,629 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:18:55,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:18:55,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1457232352, now seen corresponding path program 44 times [2022-03-03 20:18:55,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:18:55,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673215400] [2022-03-03 20:18:55,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:18:55,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:18:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:18:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:55,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:18:55,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673215400] [2022-03-03 20:18:55,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673215400] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:18:55,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159547801] [2022-03-03 20:18:55,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:18:55,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:18:55,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:18:55,900 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:18:55,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-03 20:18:55,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:18:55,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:18:55,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-03 20:18:55,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:18:56,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:18:56,247 INFO L353 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2022-03-03 20:18:56,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 126 treesize of output 102 [2022-03-03 20:18:56,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:56,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:18:56,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:56,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:56,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:18:56,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:18:56,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-03-03 20:18:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:18:56,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159547801] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:18:56,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:18:56,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2022-03-03 20:18:56,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739341571] [2022-03-03 20:18:56,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:18:56,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 20:18:56,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:18:56,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 20:18:56,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2022-03-03 20:18:56,784 INFO L87 Difference]: Start difference. First operand 3160 states and 11333 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:07,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:07,464 INFO L93 Difference]: Finished difference Result 8144 states and 26589 transitions. [2022-03-03 20:19:07,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-03-03 20:19:07,464 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:19:07,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:07,479 INFO L225 Difference]: With dead ends: 8144 [2022-03-03 20:19:07,479 INFO L226 Difference]: Without dead ends: 8004 [2022-03-03 20:19:07,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 12393 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=5769, Invalid=23987, Unknown=0, NotChecked=0, Total=29756 [2022-03-03 20:19:07,480 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 824 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 2889 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 3116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 2889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:07,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 728 Invalid, 3116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 2889 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-03 20:19:07,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8004 states. [2022-03-03 20:19:07,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8004 to 3258. [2022-03-03 20:19:07,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3258 states, 3257 states have (on average 3.604237027939822) internal successors, (11739), 3257 states have internal predecessors, (11739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:07,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3258 states to 3258 states and 11739 transitions. [2022-03-03 20:19:07,555 INFO L78 Accepts]: Start accepts. Automaton has 3258 states and 11739 transitions. Word has length 26 [2022-03-03 20:19:07,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:07,555 INFO L470 AbstractCegarLoop]: Abstraction has 3258 states and 11739 transitions. [2022-03-03 20:19:07,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:07,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3258 states and 11739 transitions. [2022-03-03 20:19:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:19:07,560 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:07,560 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:07,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:07,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:07,761 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:19:07,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:07,762 INFO L85 PathProgramCache]: Analyzing trace with hash -796349720, now seen corresponding path program 37 times [2022-03-03 20:19:07,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:07,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436301534] [2022-03-03 20:19:07,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:07,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:07,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:07,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436301534] [2022-03-03 20:19:07,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436301534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:07,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447350629] [2022-03-03 20:19:07,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:19:07,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:07,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:07,948 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:07,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-03 20:19:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:07,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:19:07,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:08,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:19:08,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:19:08,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-03-03 20:19:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:08,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:08,503 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:19:08,503 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 21 treesize of output 56 [2022-03-03 20:19:08,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:19:08,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:19:08,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:19:08,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:19:08,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:08,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447350629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:08,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:08,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-03 20:19:08,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505187796] [2022-03-03 20:19:08,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:08,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:19:08,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:08,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:19:08,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:19:08,879 INFO L87 Difference]: Start difference. First operand 3258 states and 11739 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:11,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:11,423 INFO L93 Difference]: Finished difference Result 5863 states and 19657 transitions. [2022-03-03 20:19:11,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:19:11,424 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:19:11,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:11,435 INFO L225 Difference]: With dead ends: 5863 [2022-03-03 20:19:11,435 INFO L226 Difference]: Without dead ends: 5787 [2022-03-03 20:19:11,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1778 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=851, Invalid=4849, Unknown=0, NotChecked=0, Total=5700 [2022-03-03 20:19:11,436 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 407 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:11,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 326 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:19:11,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5787 states. [2022-03-03 20:19:11,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5787 to 3266. [2022-03-03 20:19:11,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 3265 states have (on average 3.6042879019908116) internal successors, (11768), 3265 states have internal predecessors, (11768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:11,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 11768 transitions. [2022-03-03 20:19:11,501 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 11768 transitions. Word has length 26 [2022-03-03 20:19:11,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:11,501 INFO L470 AbstractCegarLoop]: Abstraction has 3266 states and 11768 transitions. [2022-03-03 20:19:11,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:11,501 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 11768 transitions. [2022-03-03 20:19:11,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:19:11,506 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:11,506 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:11,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:11,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:11,707 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:19:11,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:11,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1263964854, now seen corresponding path program 38 times [2022-03-03 20:19:11,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:11,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987702795] [2022-03-03 20:19:11,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:11,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:11,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:11,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987702795] [2022-03-03 20:19:11,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987702795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:11,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782040069] [2022-03-03 20:19:11,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:19:11,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:11,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:11,960 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:11,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-03 20:19:11,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:19:11,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:11,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:19:11,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:12,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:19:12,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:19:12,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 41 [2022-03-03 20:19:12,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:12,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:12,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:19:12,668 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 38 treesize of output 71 [2022-03-03 20:19:13,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:13,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782040069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:13,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:13,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:19:13,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296989225] [2022-03-03 20:19:13,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:13,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:19:13,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:13,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:19:13,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:19:13,491 INFO L87 Difference]: Start difference. First operand 3266 states and 11768 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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) [2022-03-03 20:19:16,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:16,755 INFO L93 Difference]: Finished difference Result 5890 states and 19730 transitions. [2022-03-03 20:19:16,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 20:19:16,755 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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 26 [2022-03-03 20:19:16,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:16,767 INFO L225 Difference]: With dead ends: 5890 [2022-03-03 20:19:16,767 INFO L226 Difference]: Without dead ends: 5875 [2022-03-03 20:19:16,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 35 SyntacticMatches, 15 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1146, Invalid=4404, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 20:19:16,768 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 448 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:16,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 341 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1011 Invalid, 0 Unknown, 188 Unchecked, 0.6s Time] [2022-03-03 20:19:16,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5875 states. [2022-03-03 20:19:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5875 to 3263. [2022-03-03 20:19:16,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 3.604843654199877) internal successors, (11759), 3262 states have internal predecessors, (11759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:16,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 11759 transitions. [2022-03-03 20:19:16,854 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 11759 transitions. Word has length 26 [2022-03-03 20:19:16,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:16,854 INFO L470 AbstractCegarLoop]: Abstraction has 3263 states and 11759 transitions. [2022-03-03 20:19:16,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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) [2022-03-03 20:19:16,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 11759 transitions. [2022-03-03 20:19:16,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:19:16,859 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:16,859 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:16,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-03 20:19:17,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-03-03 20:19:17,060 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:19:17,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:17,060 INFO L85 PathProgramCache]: Analyzing trace with hash -442415060, now seen corresponding path program 45 times [2022-03-03 20:19:17,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:17,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888453561] [2022-03-03 20:19:17,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:17,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:17,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:17,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888453561] [2022-03-03 20:19:17,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888453561] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:17,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416869232] [2022-03-03 20:19:17,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:19:17,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:17,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:17,293 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:17,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-03 20:19:17,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:19:17,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:17,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:19:17,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:17,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:19:17,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:19:17,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:19:17,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:19:17,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-03-03 20:19:17,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:17,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:17,753 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:19:17,754 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 22 treesize of output 47 [2022-03-03 20:19:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:18,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416869232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:18,128 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:18,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-03-03 20:19:18,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609360359] [2022-03-03 20:19:18,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:18,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:19:18,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:18,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:19:18,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:19:18,129 INFO L87 Difference]: Start difference. First operand 3263 states and 11759 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:19,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:19,335 INFO L93 Difference]: Finished difference Result 4518 states and 15769 transitions. [2022-03-03 20:19:19,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 20:19:19,335 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:19:19,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:19,344 INFO L225 Difference]: With dead ends: 4518 [2022-03-03 20:19:19,344 INFO L226 Difference]: Without dead ends: 4438 [2022-03-03 20:19:19,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=427, Invalid=2123, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 20:19:19,345 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 222 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:19,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 267 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 889 Invalid, 0 Unknown, 227 Unchecked, 0.4s Time] [2022-03-03 20:19:19,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2022-03-03 20:19:19,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 3243. [2022-03-03 20:19:19,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3243 states, 3242 states have (on average 3.6085749537322642) internal successors, (11699), 3242 states have internal predecessors, (11699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:19,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3243 states to 3243 states and 11699 transitions. [2022-03-03 20:19:19,398 INFO L78 Accepts]: Start accepts. Automaton has 3243 states and 11699 transitions. Word has length 26 [2022-03-03 20:19:19,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:19,398 INFO L470 AbstractCegarLoop]: Abstraction has 3243 states and 11699 transitions. [2022-03-03 20:19:19,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:19,399 INFO L276 IsEmpty]: Start isEmpty. Operand 3243 states and 11699 transitions. [2022-03-03 20:19:19,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:19:19,404 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:19,404 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:19,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-03 20:19:19,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:19,604 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:19:19,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:19,604 INFO L85 PathProgramCache]: Analyzing trace with hash -201202114, now seen corresponding path program 46 times [2022-03-03 20:19:19,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:19,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826159460] [2022-03-03 20:19:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:19,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:19,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:19,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826159460] [2022-03-03 20:19:19,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826159460] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:19,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388410962] [2022-03-03 20:19:19,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:19:19,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:19,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:19,877 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:19,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-03 20:19:19,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:19:19,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:19,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:19:19,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:20,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:19:20,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:19:20,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:19:20,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2022-03-03 20:19:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:20,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:20,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:19:20,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:19:20,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:19:20,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:19:20,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-03-03 20:19:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:20,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388410962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:20,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:20,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2022-03-03 20:19:20,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627028298] [2022-03-03 20:19:20,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:20,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:19:20,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:20,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:19:20,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:19:20,580 INFO L87 Difference]: Start difference. First operand 3243 states and 11699 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:22,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:22,965 INFO L93 Difference]: Finished difference Result 6253 states and 21260 transitions. [2022-03-03 20:19:22,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-03 20:19:22,965 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:19:22,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:22,978 INFO L225 Difference]: With dead ends: 6253 [2022-03-03 20:19:22,978 INFO L226 Difference]: Without dead ends: 6161 [2022-03-03 20:19:22,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1002, Invalid=4698, Unknown=0, NotChecked=0, Total=5700 [2022-03-03 20:19:22,978 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 386 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:22,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 455 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1400 Invalid, 0 Unknown, 321 Unchecked, 0.7s Time] [2022-03-03 20:19:22,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2022-03-03 20:19:23,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 3349. [2022-03-03 20:19:23,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3349 states, 3348 states have (on average 3.607228195937873) internal successors, (12077), 3348 states have internal predecessors, (12077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:23,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3349 states to 3349 states and 12077 transitions. [2022-03-03 20:19:23,045 INFO L78 Accepts]: Start accepts. Automaton has 3349 states and 12077 transitions. Word has length 26 [2022-03-03 20:19:23,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:23,046 INFO L470 AbstractCegarLoop]: Abstraction has 3349 states and 12077 transitions. [2022-03-03 20:19:23,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:23,046 INFO L276 IsEmpty]: Start isEmpty. Operand 3349 states and 12077 transitions. [2022-03-03 20:19:23,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:19:23,051 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:23,051 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:23,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-03 20:19:23,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:23,251 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:19:23,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:23,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1867510744, now seen corresponding path program 39 times [2022-03-03 20:19:23,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:23,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441757810] [2022-03-03 20:19:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:23,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:23,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:23,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:23,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441757810] [2022-03-03 20:19:23,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441757810] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:23,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040052818] [2022-03-03 20:19:23,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:19:23,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:23,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:23,431 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:23,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-03 20:19:23,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:19:23,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:23,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:19:23,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:23,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:19:23,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:19:23,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2022-03-03 20:19:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:23,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:24,062 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:19:24,062 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 37 treesize of output 70 [2022-03-03 20:19:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:24,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040052818] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:24,978 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:24,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 20:19:24,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086115924] [2022-03-03 20:19:24,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:24,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:19:24,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:24,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:19:24,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:19:24,979 INFO L87 Difference]: Start difference. First operand 3349 states and 12077 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:27,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:27,887 INFO L93 Difference]: Finished difference Result 6399 states and 21260 transitions. [2022-03-03 20:19:27,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 20:19:27,888 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:19:27,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:27,900 INFO L225 Difference]: With dead ends: 6399 [2022-03-03 20:19:27,901 INFO L226 Difference]: Without dead ends: 6334 [2022-03-03 20:19:27,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1079, Invalid=4323, Unknown=0, NotChecked=0, Total=5402 [2022-03-03 20:19:27,901 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 377 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:27,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 370 Invalid, 1600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1216 Invalid, 0 Unknown, 313 Unchecked, 0.6s Time] [2022-03-03 20:19:27,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6334 states. [2022-03-03 20:19:27,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6334 to 3288. [2022-03-03 20:19:27,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3288 states, 3287 states have (on average 3.606327958624886) internal successors, (11854), 3287 states have internal predecessors, (11854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3288 states to 3288 states and 11854 transitions. [2022-03-03 20:19:27,966 INFO L78 Accepts]: Start accepts. Automaton has 3288 states and 11854 transitions. Word has length 26 [2022-03-03 20:19:27,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:27,966 INFO L470 AbstractCegarLoop]: Abstraction has 3288 states and 11854 transitions. [2022-03-03 20:19:27,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:27,966 INFO L276 IsEmpty]: Start isEmpty. Operand 3288 states and 11854 transitions. [2022-03-03 20:19:27,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:19:27,971 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:27,971 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:27,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-03 20:19:28,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:28,172 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:19:28,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:28,173 INFO L85 PathProgramCache]: Analyzing trace with hash 2048965000, now seen corresponding path program 40 times [2022-03-03 20:19:28,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:28,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442754589] [2022-03-03 20:19:28,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:28,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:28,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:28,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442754589] [2022-03-03 20:19:28,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442754589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:28,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63893329] [2022-03-03 20:19:28,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:19:28,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:28,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:28,364 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:28,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-03 20:19:28,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:19:28,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:28,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:19:28,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:28,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:19:28,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:19:28,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-03-03 20:19:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:28,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:28,903 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:19:28,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-03-03 20:19:29,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:19:29,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:19:29,064 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:19:29,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:19:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:29,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63893329] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:29,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:29,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-03 20:19:29,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829520592] [2022-03-03 20:19:29,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:29,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:19:29,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:29,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:19:29,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:19:29,318 INFO L87 Difference]: Start difference. First operand 3288 states and 11854 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:31,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:31,819 INFO L93 Difference]: Finished difference Result 5718 states and 19427 transitions. [2022-03-03 20:19:31,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 20:19:31,819 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:19:31,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:31,831 INFO L225 Difference]: With dead ends: 5718 [2022-03-03 20:19:31,831 INFO L226 Difference]: Without dead ends: 5688 [2022-03-03 20:19:31,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=684, Invalid=4428, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 20:19:31,832 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 237 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 2224 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 2265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:31,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 503 Invalid, 2265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2224 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 20:19:31,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5688 states. [2022-03-03 20:19:31,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5688 to 3282. [2022-03-03 20:19:31,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3282 states, 3281 states have (on average 3.602255409935995) internal successors, (11819), 3281 states have internal predecessors, (11819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:31,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3282 states to 3282 states and 11819 transitions. [2022-03-03 20:19:31,910 INFO L78 Accepts]: Start accepts. Automaton has 3282 states and 11819 transitions. Word has length 26 [2022-03-03 20:19:31,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:31,910 INFO L470 AbstractCegarLoop]: Abstraction has 3282 states and 11819 transitions. [2022-03-03 20:19:31,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:31,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3282 states and 11819 transitions. [2022-03-03 20:19:31,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:19:31,915 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:31,915 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:31,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:32,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:32,116 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:19:32,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:32,116 INFO L85 PathProgramCache]: Analyzing trace with hash 581625440, now seen corresponding path program 41 times [2022-03-03 20:19:32,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:32,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325145572] [2022-03-03 20:19:32,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:32,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:32,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:32,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:32,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325145572] [2022-03-03 20:19:32,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325145572] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:32,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217939200] [2022-03-03 20:19:32,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:19:32,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:32,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:32,304 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:32,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-03 20:19:32,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:19:32,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:32,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:19:32,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:32,575 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-03-03 20:19:32,575 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 63 [2022-03-03 20:19:32,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:32,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:32,881 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:19:32,882 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 21 treesize of output 56 [2022-03-03 20:19:33,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:19:33,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:19:33,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:19:33,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:19:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:33,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217939200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:33,277 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:33,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-03 20:19:33,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627952021] [2022-03-03 20:19:33,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:33,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:19:33,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:33,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:19:33,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:19:33,278 INFO L87 Difference]: Start difference. First operand 3282 states and 11819 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:36,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:36,382 INFO L93 Difference]: Finished difference Result 6585 states and 21868 transitions. [2022-03-03 20:19:36,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 20:19:36,382 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:19:36,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:36,395 INFO L225 Difference]: With dead ends: 6585 [2022-03-03 20:19:36,396 INFO L226 Difference]: Without dead ends: 6485 [2022-03-03 20:19:36,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=941, Invalid=4461, Unknown=0, NotChecked=0, Total=5402 [2022-03-03 20:19:36,396 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 312 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1706 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:36,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 421 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1706 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:19:36,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6485 states. [2022-03-03 20:19:36,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6485 to 3306. [2022-03-03 20:19:36,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3306 states, 3305 states have (on average 3.5972768532526476) internal successors, (11889), 3305 states have internal predecessors, (11889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:36,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3306 states to 3306 states and 11889 transitions. [2022-03-03 20:19:36,466 INFO L78 Accepts]: Start accepts. Automaton has 3306 states and 11889 transitions. Word has length 26 [2022-03-03 20:19:36,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:36,466 INFO L470 AbstractCegarLoop]: Abstraction has 3306 states and 11889 transitions. [2022-03-03 20:19:36,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:36,466 INFO L276 IsEmpty]: Start isEmpty. Operand 3306 states and 11889 transitions. [2022-03-03 20:19:36,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:19:36,471 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:36,471 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:36,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-03 20:19:36,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:36,671 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:19:36,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:36,671 INFO L85 PathProgramCache]: Analyzing trace with hash 919972282, now seen corresponding path program 42 times [2022-03-03 20:19:36,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:36,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164923921] [2022-03-03 20:19:36,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:36,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:36,838 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:36,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164923921] [2022-03-03 20:19:36,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164923921] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:36,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699115142] [2022-03-03 20:19:36,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:19:36,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:36,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:36,839 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:36,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-03 20:19:36,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:19:36,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:36,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:19:36,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:37,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:19:37,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:19:37,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:19:37,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-03 20:19:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:37,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:37,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:19:37,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:19:37,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:19:37,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 55 [2022-03-03 20:19:37,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:37,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699115142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:37,735 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:37,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 20:19:37,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661495912] [2022-03-03 20:19:37,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:37,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:19:37,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:37,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:19:37,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:19:37,736 INFO L87 Difference]: Start difference. First operand 3306 states and 11889 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:41,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:41,585 INFO L93 Difference]: Finished difference Result 6572 states and 22169 transitions. [2022-03-03 20:19:41,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-03 20:19:41,585 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:19:41,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:41,598 INFO L225 Difference]: With dead ends: 6572 [2022-03-03 20:19:41,598 INFO L226 Difference]: Without dead ends: 6527 [2022-03-03 20:19:41,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3470 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1542, Invalid=8964, Unknown=0, NotChecked=0, Total=10506 [2022-03-03 20:19:41,599 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 476 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 2198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 920 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:41,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 630 Invalid, 2198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1212 Invalid, 0 Unknown, 920 Unchecked, 0.7s Time] [2022-03-03 20:19:41,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6527 states. [2022-03-03 20:19:41,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6527 to 3341. [2022-03-03 20:19:41,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3341 states, 3340 states have (on average 3.6035928143712574) internal successors, (12036), 3340 states have internal predecessors, (12036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:41,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3341 states to 3341 states and 12036 transitions. [2022-03-03 20:19:41,666 INFO L78 Accepts]: Start accepts. Automaton has 3341 states and 12036 transitions. Word has length 26 [2022-03-03 20:19:41,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:41,666 INFO L470 AbstractCegarLoop]: Abstraction has 3341 states and 12036 transitions. [2022-03-03 20:19:41,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:41,666 INFO L276 IsEmpty]: Start isEmpty. Operand 3341 states and 12036 transitions. [2022-03-03 20:19:41,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:19:41,671 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:41,671 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:41,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-03 20:19:41,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-03 20:19:41,871 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:19:41,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:41,872 INFO L85 PathProgramCache]: Analyzing trace with hash 796347224, now seen corresponding path program 43 times [2022-03-03 20:19:41,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:41,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833776073] [2022-03-03 20:19:41,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:41,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:42,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:42,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833776073] [2022-03-03 20:19:42,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833776073] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:42,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364517231] [2022-03-03 20:19:42,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:19:42,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:42,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:42,029 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:42,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-03 20:19:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:42,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:19:42,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:42,308 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-03-03 20:19:42,308 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 64 [2022-03-03 20:19:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:42,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:42,563 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:19:42,564 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 21 treesize of output 56 [2022-03-03 20:19:42,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:19:42,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:19:42,732 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:19:42,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:19:42,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:42,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364517231] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:42,978 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:42,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-03 20:19:42,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421368505] [2022-03-03 20:19:42,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:42,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:19:42,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:42,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:19:42,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:19:42,978 INFO L87 Difference]: Start difference. First operand 3341 states and 12036 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:45,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:45,306 INFO L93 Difference]: Finished difference Result 5825 states and 19778 transitions. [2022-03-03 20:19:45,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 20:19:45,306 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:19:45,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:45,317 INFO L225 Difference]: With dead ends: 5825 [2022-03-03 20:19:45,317 INFO L226 Difference]: Without dead ends: 5787 [2022-03-03 20:19:45,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=759, Invalid=4071, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 20:19:45,318 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 298 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 1778 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:45,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 449 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1778 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:19:45,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5787 states. [2022-03-03 20:19:45,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5787 to 3342. [2022-03-03 20:19:45,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3342 states, 3341 states have (on average 3.6025142173002096) internal successors, (12036), 3341 states have internal predecessors, (12036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:45,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3342 states to 3342 states and 12036 transitions. [2022-03-03 20:19:45,408 INFO L78 Accepts]: Start accepts. Automaton has 3342 states and 12036 transitions. Word has length 26 [2022-03-03 20:19:45,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:45,408 INFO L470 AbstractCegarLoop]: Abstraction has 3342 states and 12036 transitions. [2022-03-03 20:19:45,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:45,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3342 states and 12036 transitions. [2022-03-03 20:19:45,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:19:45,412 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:45,413 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:45,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-03 20:19:45,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:45,613 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:19:45,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:45,613 INFO L85 PathProgramCache]: Analyzing trace with hash -326643600, now seen corresponding path program 44 times [2022-03-03 20:19:45,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:45,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071126263] [2022-03-03 20:19:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:45,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:45,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:45,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071126263] [2022-03-03 20:19:45,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071126263] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:45,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959345539] [2022-03-03 20:19:45,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:19:45,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:45,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:45,781 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:45,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-03 20:19:45,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:19:45,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:45,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:19:45,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:46,053 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-03-03 20:19:46,054 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 63 [2022-03-03 20:19:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:46,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:46,319 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:19:46,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 56 [2022-03-03 20:19:46,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:19:46,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:19:46,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:19:46,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:19:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:46,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959345539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:46,753 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:46,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-03 20:19:46,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019615324] [2022-03-03 20:19:46,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:46,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:19:46,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:46,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:19:46,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:19:46,753 INFO L87 Difference]: Start difference. First operand 3342 states and 12036 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:48,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:48,516 INFO L93 Difference]: Finished difference Result 5761 states and 19513 transitions. [2022-03-03 20:19:48,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 20:19:48,516 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:19:48,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:48,527 INFO L225 Difference]: With dead ends: 5761 [2022-03-03 20:19:48,527 INFO L226 Difference]: Without dead ends: 5681 [2022-03-03 20:19:48,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=641, Invalid=3265, Unknown=0, NotChecked=0, Total=3906 [2022-03-03 20:19:48,528 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 310 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:48,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 301 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:19:48,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5681 states. [2022-03-03 20:19:48,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5681 to 3325. [2022-03-03 20:19:48,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3325 states, 3324 states have (on average 3.6028880866425994) internal successors, (11976), 3324 states have internal predecessors, (11976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:48,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3325 states to 3325 states and 11976 transitions. [2022-03-03 20:19:48,603 INFO L78 Accepts]: Start accepts. Automaton has 3325 states and 11976 transitions. Word has length 26 [2022-03-03 20:19:48,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:48,603 INFO L470 AbstractCegarLoop]: Abstraction has 3325 states and 11976 transitions. [2022-03-03 20:19:48,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:48,603 INFO L276 IsEmpty]: Start isEmpty. Operand 3325 states and 11976 transitions. [2022-03-03 20:19:48,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:19:48,608 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:48,608 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:48,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-03 20:19:48,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:48,809 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:19:48,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:48,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1944965776, now seen corresponding path program 45 times [2022-03-03 20:19:48,809 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:48,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264718688] [2022-03-03 20:19:48,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:48,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:48,957 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:48,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264718688] [2022-03-03 20:19:48,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264718688] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:48,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989153174] [2022-03-03 20:19:48,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:19:48,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:48,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:48,959 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:48,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-03 20:19:48,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:19:48,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:48,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:19:48,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:49,355 INFO L353 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-03-03 20:19:49,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 50 [2022-03-03 20:19:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:49,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:49,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:19:49,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 71 [2022-03-03 20:19:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:50,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989153174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:50,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:50,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-03-03 20:19:50,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255134360] [2022-03-03 20:19:50,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:50,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:19:50,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:50,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:19:50,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:19:50,396 INFO L87 Difference]: Start difference. First operand 3325 states and 11976 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:52,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:52,100 INFO L93 Difference]: Finished difference Result 5329 states and 17858 transitions. [2022-03-03 20:19:52,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 20:19:52,100 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:19:52,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:52,111 INFO L225 Difference]: With dead ends: 5329 [2022-03-03 20:19:52,111 INFO L226 Difference]: Without dead ends: 5240 [2022-03-03 20:19:52,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=434, Invalid=2428, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 20:19:52,111 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 229 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:52,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 421 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1213 Invalid, 0 Unknown, 153 Unchecked, 0.6s Time] [2022-03-03 20:19:52,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5240 states. [2022-03-03 20:19:52,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5240 to 3399. [2022-03-03 20:19:52,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 3398 states have (on average 3.5991759858740435) internal successors, (12230), 3398 states have internal predecessors, (12230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:52,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 12230 transitions. [2022-03-03 20:19:52,172 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 12230 transitions. Word has length 26 [2022-03-03 20:19:52,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:52,172 INFO L470 AbstractCegarLoop]: Abstraction has 3399 states and 12230 transitions. [2022-03-03 20:19:52,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:52,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 12230 transitions. [2022-03-03 20:19:52,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:19:52,177 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:52,177 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:52,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-03 20:19:52,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:52,378 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:19:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:52,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1836189860, now seen corresponding path program 46 times [2022-03-03 20:19:52,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:52,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906118612] [2022-03-03 20:19:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:52,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:52,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:52,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906118612] [2022-03-03 20:19:52,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906118612] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:52,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021529000] [2022-03-03 20:19:52,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:19:52,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:52,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:52,539 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:52,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-03 20:19:52,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:19:52,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:52,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:19:52,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:52,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:19:52,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:19:52,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-03-03 20:19:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:52,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:53,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:19:53,122 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 38 treesize of output 71 [2022-03-03 20:19:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:53,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021529000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:53,990 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:53,990 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 20:19:53,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298180672] [2022-03-03 20:19:53,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:53,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:19:53,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:53,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:19:53,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:19:53,991 INFO L87 Difference]: Start difference. First operand 3399 states and 12230 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:55,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:55,575 INFO L93 Difference]: Finished difference Result 5187 states and 17669 transitions. [2022-03-03 20:19:55,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 20:19:55,575 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:19:55,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:55,585 INFO L225 Difference]: With dead ends: 5187 [2022-03-03 20:19:55,586 INFO L226 Difference]: Without dead ends: 5157 [2022-03-03 20:19:55,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=479, Invalid=2071, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 20:19:55,586 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 241 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 365 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:55,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 225 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 711 Invalid, 0 Unknown, 365 Unchecked, 0.3s Time] [2022-03-03 20:19:55,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5157 states. [2022-03-03 20:19:55,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5157 to 3468. [2022-03-03 20:19:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3468 states, 3467 states have (on average 3.5950389385635995) internal successors, (12464), 3467 states have internal predecessors, (12464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:55,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3468 states to 3468 states and 12464 transitions. [2022-03-03 20:19:55,659 INFO L78 Accepts]: Start accepts. Automaton has 3468 states and 12464 transitions. Word has length 26 [2022-03-03 20:19:55,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:55,659 INFO L470 AbstractCegarLoop]: Abstraction has 3468 states and 12464 transitions. [2022-03-03 20:19:55,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:55,659 INFO L276 IsEmpty]: Start isEmpty. Operand 3468 states and 12464 transitions. [2022-03-03 20:19:55,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:19:55,664 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:55,664 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:55,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-03 20:19:55,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:55,864 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:19:55,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:19:55,865 INFO L85 PathProgramCache]: Analyzing trace with hash -2003998952, now seen corresponding path program 47 times [2022-03-03 20:19:55,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:19:55,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757878560] [2022-03-03 20:19:55,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:19:55,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:19:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:19:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:56,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:19:56,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757878560] [2022-03-03 20:19:56,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757878560] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:19:56,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233864797] [2022-03-03 20:19:56,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:19:56,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:19:56,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:19:56,044 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:19:56,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-03 20:19:56,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 20:19:56,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:19:56,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:19:56,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:19:56,347 INFO L353 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-03-03 20:19:56,347 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 55 [2022-03-03 20:19:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:56,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:19:56,549 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:19:56,549 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 21 treesize of output 56 [2022-03-03 20:19:56,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:19:56,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:19:56,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:19:56,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:19:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:19:56,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233864797] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:19:56,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:19:56,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-03 20:19:56,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156480076] [2022-03-03 20:19:56,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:19:56,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:19:56,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:19:56,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:19:56,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:19:56,948 INFO L87 Difference]: Start difference. First operand 3468 states and 12464 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:59,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:19:59,781 INFO L93 Difference]: Finished difference Result 6444 states and 21715 transitions. [2022-03-03 20:19:59,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 20:19:59,781 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:19:59,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:19:59,794 INFO L225 Difference]: With dead ends: 6444 [2022-03-03 20:19:59,794 INFO L226 Difference]: Without dead ends: 6414 [2022-03-03 20:19:59,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=723, Invalid=4247, Unknown=0, NotChecked=0, Total=4970 [2022-03-03 20:19:59,795 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 270 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 1999 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 2043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:19:59,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 446 Invalid, 2043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1999 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:19:59,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6414 states. [2022-03-03 20:19:59,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6414 to 3448. [2022-03-03 20:19:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3448 states, 3447 states have (on average 3.6011024078909197) internal successors, (12413), 3447 states have internal predecessors, (12413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:59,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 12413 transitions. [2022-03-03 20:19:59,864 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 12413 transitions. Word has length 26 [2022-03-03 20:19:59,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:19:59,864 INFO L470 AbstractCegarLoop]: Abstraction has 3448 states and 12413 transitions. [2022-03-03 20:19:59,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:19:59,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 12413 transitions. [2022-03-03 20:19:59,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:19:59,869 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:19:59,869 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:19:59,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-03 20:20:00,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:00,070 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:20:00,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:00,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1705225504, now seen corresponding path program 48 times [2022-03-03 20:20:00,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:00,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516021319] [2022-03-03 20:20:00,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:00,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:00,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:00,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:00,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516021319] [2022-03-03 20:20:00,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516021319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:00,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561048212] [2022-03-03 20:20:00,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:20:00,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:00,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:00,216 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:00,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-03 20:20:00,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:20:00,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:20:00,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:20:00,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:00,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:00,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:20:00,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-03-03 20:20:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:00,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:00,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:00,731 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:20:00,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 55 [2022-03-03 20:20:00,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:00,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:00,883 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:20:00,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:20:01,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:01,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561048212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:01,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:01,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:20:01,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675475872] [2022-03-03 20:20:01,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:01,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:20:01,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:01,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:20:01,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:20:01,169 INFO L87 Difference]: Start difference. First operand 3448 states and 12413 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:02,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:02,644 INFO L93 Difference]: Finished difference Result 5237 states and 17842 transitions. [2022-03-03 20:20:02,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 20:20:02,644 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:20:02,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:02,656 INFO L225 Difference]: With dead ends: 5237 [2022-03-03 20:20:02,656 INFO L226 Difference]: Without dead ends: 5161 [2022-03-03 20:20:02,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=477, Invalid=1973, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 20:20:02,657 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 204 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:02,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 280 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 918 Invalid, 0 Unknown, 195 Unchecked, 0.4s Time] [2022-03-03 20:20:02,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2022-03-03 20:20:02,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 3474. [2022-03-03 20:20:02,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3474 states, 3473 states have (on average 3.593435070544198) internal successors, (12480), 3473 states have internal predecessors, (12480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:02,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3474 states to 3474 states and 12480 transitions. [2022-03-03 20:20:02,718 INFO L78 Accepts]: Start accepts. Automaton has 3474 states and 12480 transitions. Word has length 26 [2022-03-03 20:20:02,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:02,718 INFO L470 AbstractCegarLoop]: Abstraction has 3474 states and 12480 transitions. [2022-03-03 20:20:02,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:02,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3474 states and 12480 transitions. [2022-03-03 20:20:02,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:20:02,723 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:02,723 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:02,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-03 20:20:02,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-03-03 20:20:02,923 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:20:02,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:02,924 INFO L85 PathProgramCache]: Analyzing trace with hash 639330528, now seen corresponding path program 49 times [2022-03-03 20:20:02,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:02,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661245900] [2022-03-03 20:20:02,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:02,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:02,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:03,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:03,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661245900] [2022-03-03 20:20:03,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661245900] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:03,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343469342] [2022-03-03 20:20:03,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:20:03,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:03,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:03,103 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:03,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-03 20:20:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:03,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:20:03,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:03,417 INFO L353 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-03-03 20:20:03,417 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 58 [2022-03-03 20:20:03,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:03,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:03,608 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:20:03,608 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 21 treesize of output 56 [2022-03-03 20:20:03,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:03,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:03,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:20:03,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:20:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:03,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343469342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:03,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:03,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-03 20:20:03,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446002273] [2022-03-03 20:20:03,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:03,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:20:03,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:03,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:20:03,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:20:03,987 INFO L87 Difference]: Start difference. First operand 3474 states and 12480 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:04,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:04,967 INFO L93 Difference]: Finished difference Result 5553 states and 18988 transitions. [2022-03-03 20:20:04,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 20:20:04,967 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:20:04,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:04,977 INFO L225 Difference]: With dead ends: 5553 [2022-03-03 20:20:04,978 INFO L226 Difference]: Without dead ends: 5523 [2022-03-03 20:20:04,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=315, Invalid=1665, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 20:20:04,978 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 165 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:04,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 290 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 913 Invalid, 0 Unknown, 228 Unchecked, 0.4s Time] [2022-03-03 20:20:04,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2022-03-03 20:20:05,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 3501. [2022-03-03 20:20:05,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3501 states, 3500 states have (on average 3.592285714285714) internal successors, (12573), 3500 states have internal predecessors, (12573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:05,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3501 states to 3501 states and 12573 transitions. [2022-03-03 20:20:05,040 INFO L78 Accepts]: Start accepts. Automaton has 3501 states and 12573 transitions. Word has length 26 [2022-03-03 20:20:05,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:05,040 INFO L470 AbstractCegarLoop]: Abstraction has 3501 states and 12573 transitions. [2022-03-03 20:20:05,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:05,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3501 states and 12573 transitions. [2022-03-03 20:20:05,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:20:05,045 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:05,045 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:05,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-03 20:20:05,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-03 20:20:05,246 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:20:05,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:05,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1438671812, now seen corresponding path program 50 times [2022-03-03 20:20:05,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:05,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844593385] [2022-03-03 20:20:05,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:05,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:05,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:05,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844593385] [2022-03-03 20:20:05,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844593385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:05,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919906768] [2022-03-03 20:20:05,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:20:05,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:05,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:05,407 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:05,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-03 20:20:05,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:20:05,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:20:05,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:20:05,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:05,696 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-03-03 20:20:05,696 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 63 [2022-03-03 20:20:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:05,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:05,925 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:20:05,925 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 21 treesize of output 56 [2022-03-03 20:20:06,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:06,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:06,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:20:06,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:20:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:06,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919906768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:06,331 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:06,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-03 20:20:06,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358815355] [2022-03-03 20:20:06,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:06,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:20:06,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:06,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:20:06,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:20:06,332 INFO L87 Difference]: Start difference. First operand 3501 states and 12573 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:08,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:08,570 INFO L93 Difference]: Finished difference Result 5636 states and 19278 transitions. [2022-03-03 20:20:08,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 20:20:08,570 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:20:08,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:08,580 INFO L225 Difference]: With dead ends: 5636 [2022-03-03 20:20:08,580 INFO L226 Difference]: Without dead ends: 5621 [2022-03-03 20:20:08,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=573, Invalid=3587, Unknown=0, NotChecked=0, Total=4160 [2022-03-03 20:20:08,581 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 223 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 2105 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 2149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:08,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 464 Invalid, 2149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2105 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:20:08,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5621 states. [2022-03-03 20:20:08,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5621 to 3519. [2022-03-03 20:20:08,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3519 states, 3518 states have (on average 3.590108015918135) internal successors, (12630), 3518 states have internal predecessors, (12630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3519 states to 3519 states and 12630 transitions. [2022-03-03 20:20:08,640 INFO L78 Accepts]: Start accepts. Automaton has 3519 states and 12630 transitions. Word has length 26 [2022-03-03 20:20:08,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:08,640 INFO L470 AbstractCegarLoop]: Abstraction has 3519 states and 12630 transitions. [2022-03-03 20:20:08,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:08,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3519 states and 12630 transitions. [2022-03-03 20:20:08,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:20:08,645 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:08,645 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:08,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-03 20:20:08,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:08,846 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:20:08,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:08,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1868803872, now seen corresponding path program 51 times [2022-03-03 20:20:08,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:08,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355052380] [2022-03-03 20:20:08,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:08,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:08,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:08,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355052380] [2022-03-03 20:20:08,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355052380] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:08,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334700226] [2022-03-03 20:20:08,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:20:08,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:08,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:08,983 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:08,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-03 20:20:09,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:20:09,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:20:09,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:20:09,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:09,287 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 20:20:09,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 65 [2022-03-03 20:20:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:09,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:09,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:20:09,599 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 37 treesize of output 70 [2022-03-03 20:20:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:10,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334700226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:10,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:10,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:20:10,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472788896] [2022-03-03 20:20:10,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:10,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:20:10,619 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:10,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:20:10,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:20:10,619 INFO L87 Difference]: Start difference. First operand 3519 states and 12630 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:11,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:11,947 INFO L93 Difference]: Finished difference Result 5158 states and 17645 transitions. [2022-03-03 20:20:11,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 20:20:11,948 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:20:11,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:11,957 INFO L225 Difference]: With dead ends: 5158 [2022-03-03 20:20:11,957 INFO L226 Difference]: Without dead ends: 5082 [2022-03-03 20:20:11,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=420, Invalid=1650, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 20:20:11,958 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 216 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 472 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:11,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 249 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 449 Invalid, 0 Unknown, 472 Unchecked, 0.2s Time] [2022-03-03 20:20:11,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5082 states. [2022-03-03 20:20:12,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5082 to 3543. [2022-03-03 20:20:12,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3542 states have (on average 3.5928853754940713) internal successors, (12726), 3542 states have internal predecessors, (12726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:12,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 12726 transitions. [2022-03-03 20:20:12,030 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 12726 transitions. Word has length 26 [2022-03-03 20:20:12,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:12,030 INFO L470 AbstractCegarLoop]: Abstraction has 3543 states and 12726 transitions. [2022-03-03 20:20:12,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:12,030 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 12726 transitions. [2022-03-03 20:20:12,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:20:12,035 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:12,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:12,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-03 20:20:12,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:12,236 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:20:12,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:12,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1742870530, now seen corresponding path program 52 times [2022-03-03 20:20:12,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:12,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518816893] [2022-03-03 20:20:12,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:12,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:12,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:12,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518816893] [2022-03-03 20:20:12,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518816893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:12,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449414467] [2022-03-03 20:20:12,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:20:12,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:12,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:12,400 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:12,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-03 20:20:12,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:20:12,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:20:12,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:20:12,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:12,740 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 20:20:12,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 65 [2022-03-03 20:20:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:12,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:13,040 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:20:13,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 70 [2022-03-03 20:20:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:13,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449414467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:13,876 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:13,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:20:13,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233085864] [2022-03-03 20:20:13,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:13,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:20:13,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:13,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:20:13,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:20:13,877 INFO L87 Difference]: Start difference. First operand 3543 states and 12726 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:15,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:15,312 INFO L93 Difference]: Finished difference Result 5144 states and 17580 transitions. [2022-03-03 20:20:15,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 20:20:15,312 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:20:15,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:15,321 INFO L225 Difference]: With dead ends: 5144 [2022-03-03 20:20:15,321 INFO L226 Difference]: Without dead ends: 5068 [2022-03-03 20:20:15,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=440, Invalid=1722, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 20:20:15,322 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 171 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 409 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:15,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 249 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 427 Invalid, 0 Unknown, 409 Unchecked, 0.2s Time] [2022-03-03 20:20:15,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5068 states. [2022-03-03 20:20:15,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5068 to 3537. [2022-03-03 20:20:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3537 states, 3536 states have (on average 3.5924773755656108) internal successors, (12703), 3536 states have internal predecessors, (12703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3537 states to 3537 states and 12703 transitions. [2022-03-03 20:20:15,378 INFO L78 Accepts]: Start accepts. Automaton has 3537 states and 12703 transitions. Word has length 26 [2022-03-03 20:20:15,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:15,378 INFO L470 AbstractCegarLoop]: Abstraction has 3537 states and 12703 transitions. [2022-03-03 20:20:15,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 3537 states and 12703 transitions. [2022-03-03 20:20:15,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:20:15,383 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:15,383 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:15,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-03 20:20:15,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-03 20:20:15,584 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:20:15,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:15,584 INFO L85 PathProgramCache]: Analyzing trace with hash 615736860, now seen corresponding path program 53 times [2022-03-03 20:20:15,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:15,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618572145] [2022-03-03 20:20:15,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:15,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:15,749 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:15,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618572145] [2022-03-03 20:20:15,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618572145] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:15,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51096144] [2022-03-03 20:20:15,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:20:15,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:15,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:15,752 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:15,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-03 20:20:15,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:20:15,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:20:15,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 20:20:15,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:16,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:16,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:20:16,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 36 [2022-03-03 20:20:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:16,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:16,448 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:20:16,448 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 37 treesize of output 70 [2022-03-03 20:20:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:17,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51096144] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:17,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:17,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:20:17,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157637207] [2022-03-03 20:20:17,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:17,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:20:17,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:17,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:20:17,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:20:17,163 INFO L87 Difference]: Start difference. First operand 3537 states and 12703 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:18,907 INFO L93 Difference]: Finished difference Result 4499 states and 15523 transitions. [2022-03-03 20:20:18,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 20:20:18,907 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:20:18,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:18,915 INFO L225 Difference]: With dead ends: 4499 [2022-03-03 20:20:18,915 INFO L226 Difference]: Without dead ends: 4439 [2022-03-03 20:20:18,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=609, Invalid=3173, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 20:20:18,916 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 201 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:18,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 217 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 389 Invalid, 0 Unknown, 635 Unchecked, 0.2s Time] [2022-03-03 20:20:18,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4439 states. [2022-03-03 20:20:18,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4439 to 3602. [2022-03-03 20:20:18,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3602 states, 3601 states have (on average 3.5945570674812553) internal successors, (12944), 3601 states have internal predecessors, (12944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:18,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3602 states to 3602 states and 12944 transitions. [2022-03-03 20:20:18,984 INFO L78 Accepts]: Start accepts. Automaton has 3602 states and 12944 transitions. Word has length 26 [2022-03-03 20:20:18,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:18,984 INFO L470 AbstractCegarLoop]: Abstraction has 3602 states and 12944 transitions. [2022-03-03 20:20:18,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:18,985 INFO L276 IsEmpty]: Start isEmpty. Operand 3602 states and 12944 transitions. [2022-03-03 20:20:18,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:20:18,989 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:18,989 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:19,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-03 20:20:19,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:19,190 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:20:19,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:19,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1041593588, now seen corresponding path program 54 times [2022-03-03 20:20:19,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:19,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306760818] [2022-03-03 20:20:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:19,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:19,357 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:19,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306760818] [2022-03-03 20:20:19,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306760818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:19,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334995289] [2022-03-03 20:20:19,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:20:19,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:19,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:19,360 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:19,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-03 20:20:19,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 20:20:19,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:20:19,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:20:19,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:19,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:19,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:19,678 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:20:19,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-03-03 20:20:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:19,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:19,934 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:20:19,935 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 21 treesize of output 56 [2022-03-03 20:20:20,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:20,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:20,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:20:20,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:20:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:20,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334995289] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:20,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:20,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-03 20:20:20,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055521880] [2022-03-03 20:20:20,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:20,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:20:20,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:20,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:20:20,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:20:20,380 INFO L87 Difference]: Start difference. First operand 3602 states and 12944 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:23,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:23,176 INFO L93 Difference]: Finished difference Result 6706 states and 22509 transitions. [2022-03-03 20:20:23,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 20:20:23,176 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:20:23,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:23,188 INFO L225 Difference]: With dead ends: 6706 [2022-03-03 20:20:23,189 INFO L226 Difference]: Without dead ends: 6604 [2022-03-03 20:20:23,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=925, Invalid=5237, Unknown=0, NotChecked=0, Total=6162 [2022-03-03 20:20:23,189 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 322 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 2170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:23,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 510 Invalid, 2170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2112 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 20:20:23,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6604 states. [2022-03-03 20:20:23,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6604 to 3627. [2022-03-03 20:20:23,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 3.5948703805846662) internal successors, (13035), 3626 states have internal predecessors, (13035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:23,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 13035 transitions. [2022-03-03 20:20:23,259 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 13035 transitions. Word has length 26 [2022-03-03 20:20:23,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:23,259 INFO L470 AbstractCegarLoop]: Abstraction has 3627 states and 13035 transitions. [2022-03-03 20:20:23,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:23,259 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 13035 transitions. [2022-03-03 20:20:23,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:20:23,264 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:23,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:23,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-03 20:20:23,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:23,486 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:20:23,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:23,487 INFO L85 PathProgramCache]: Analyzing trace with hash 370220598, now seen corresponding path program 55 times [2022-03-03 20:20:23,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:23,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712197248] [2022-03-03 20:20:23,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:23,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:23,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:23,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:23,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712197248] [2022-03-03 20:20:23,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712197248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:23,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013517454] [2022-03-03 20:20:23,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:20:23,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:23,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:23,626 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:23,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-03 20:20:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:23,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:20:23,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:23,930 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 20:20:23,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 60 [2022-03-03 20:20:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:24,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:24,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:20:24,245 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 37 treesize of output 70 [2022-03-03 20:20:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:25,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013517454] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:25,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:25,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:20:25,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470248132] [2022-03-03 20:20:25,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:25,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:20:25,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:25,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:20:25,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:20:25,037 INFO L87 Difference]: Start difference. First operand 3627 states and 13035 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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) [2022-03-03 20:20:26,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:26,374 INFO L93 Difference]: Finished difference Result 5475 states and 18680 transitions. [2022-03-03 20:20:26,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 20:20:26,374 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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 26 [2022-03-03 20:20:26,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:26,384 INFO L225 Difference]: With dead ends: 5475 [2022-03-03 20:20:26,384 INFO L226 Difference]: Without dead ends: 5399 [2022-03-03 20:20:26,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 20:20:26,384 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 262 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 386 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:26,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 179 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 406 Invalid, 0 Unknown, 386 Unchecked, 0.2s Time] [2022-03-03 20:20:26,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5399 states. [2022-03-03 20:20:26,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5399 to 3633. [2022-03-03 20:20:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3633 states, 3632 states have (on average 3.592786343612335) internal successors, (13049), 3632 states have internal predecessors, (13049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:26,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3633 states to 3633 states and 13049 transitions. [2022-03-03 20:20:26,444 INFO L78 Accepts]: Start accepts. Automaton has 3633 states and 13049 transitions. Word has length 26 [2022-03-03 20:20:26,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:26,444 INFO L470 AbstractCegarLoop]: Abstraction has 3633 states and 13049 transitions. [2022-03-03 20:20:26,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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) [2022-03-03 20:20:26,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3633 states and 13049 transitions. [2022-03-03 20:20:26,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:20:26,449 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:26,449 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:26,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-03 20:20:26,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-03 20:20:26,649 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:20:26,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:26,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1124130446, now seen corresponding path program 47 times [2022-03-03 20:20:26,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:26,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357711316] [2022-03-03 20:20:26,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:26,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:26,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:26,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:26,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357711316] [2022-03-03 20:20:26,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357711316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:26,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523456024] [2022-03-03 20:20:26,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:20:26,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:26,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:26,871 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:26,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-03 20:20:26,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:20:26,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:20:26,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:20:26,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:27,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:27,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:27,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:27,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2022-03-03 20:20:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:27,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:27,283 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:20:27,283 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 22 treesize of output 47 [2022-03-03 20:20:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:27,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523456024] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:27,429 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:27,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-03 20:20:27,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577724774] [2022-03-03 20:20:27,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:27,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:20:27,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:27,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:20:27,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:20:27,430 INFO L87 Difference]: Start difference. First operand 3633 states and 13049 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:28,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:28,216 INFO L93 Difference]: Finished difference Result 5078 states and 17638 transitions. [2022-03-03 20:20:28,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 20:20:28,216 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:20:28,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:28,225 INFO L225 Difference]: With dead ends: 5078 [2022-03-03 20:20:28,225 INFO L226 Difference]: Without dead ends: 5030 [2022-03-03 20:20:28,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=318, Invalid=1662, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 20:20:28,226 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 167 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:28,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 233 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:20:28,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5030 states. [2022-03-03 20:20:28,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5030 to 3623. [2022-03-03 20:20:28,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3623 states, 3622 states have (on average 3.5919381557150745) internal successors, (13010), 3622 states have internal predecessors, (13010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:28,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 13010 transitions. [2022-03-03 20:20:28,279 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 13010 transitions. Word has length 26 [2022-03-03 20:20:28,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:28,279 INFO L470 AbstractCegarLoop]: Abstraction has 3623 states and 13010 transitions. [2022-03-03 20:20:28,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:28,279 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 13010 transitions. [2022-03-03 20:20:28,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:20:28,285 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:28,285 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:28,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-03 20:20:28,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-03 20:20:28,486 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:20:28,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:28,486 INFO L85 PathProgramCache]: Analyzing trace with hash 281045340, now seen corresponding path program 48 times [2022-03-03 20:20:28,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:28,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003888075] [2022-03-03 20:20:28,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:28,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:28,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:28,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003888075] [2022-03-03 20:20:28,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003888075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:28,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221585564] [2022-03-03 20:20:28,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:20:28,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:28,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:28,666 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:28,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-03 20:20:28,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:20:28,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:20:28,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-03 20:20:28,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:29,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:29,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:20:29,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2022-03-03 20:20:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:29,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:29,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:29,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:29,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:20:29,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:20:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:29,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221585564] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:29,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:29,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-03 20:20:29,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448094592] [2022-03-03 20:20:29,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:29,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 20:20:29,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:29,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 20:20:29,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:20:29,499 INFO L87 Difference]: Start difference. First operand 3623 states and 13010 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:31,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:31,074 INFO L93 Difference]: Finished difference Result 5098 states and 17401 transitions. [2022-03-03 20:20:31,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 20:20:31,074 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:20:31,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:31,084 INFO L225 Difference]: With dead ends: 5098 [2022-03-03 20:20:31,084 INFO L226 Difference]: Without dead ends: 5053 [2022-03-03 20:20:31,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=699, Invalid=4413, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 20:20:31,085 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 275 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 463 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:31,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 445 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 808 Invalid, 0 Unknown, 463 Unchecked, 0.4s Time] [2022-03-03 20:20:31,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5053 states. [2022-03-03 20:20:31,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5053 to 3665. [2022-03-03 20:20:31,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3665 states, 3664 states have (on average 3.586517467248908) internal successors, (13141), 3664 states have internal predecessors, (13141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:31,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 13141 transitions. [2022-03-03 20:20:31,160 INFO L78 Accepts]: Start accepts. Automaton has 3665 states and 13141 transitions. Word has length 26 [2022-03-03 20:20:31,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:31,160 INFO L470 AbstractCegarLoop]: Abstraction has 3665 states and 13141 transitions. [2022-03-03 20:20:31,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:31,161 INFO L276 IsEmpty]: Start isEmpty. Operand 3665 states and 13141 transitions. [2022-03-03 20:20:31,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:20:31,165 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:31,166 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:31,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-03 20:20:31,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:31,366 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:20:31,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:31,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1348919904, now seen corresponding path program 49 times [2022-03-03 20:20:31,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:31,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010243184] [2022-03-03 20:20:31,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:31,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:31,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:31,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010243184] [2022-03-03 20:20:31,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010243184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:31,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085374713] [2022-03-03 20:20:31,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:20:31,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:31,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:31,569 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:31,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-03 20:20:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:31,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:20:31,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:31,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:31,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:31,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:31,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:31,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 21 [2022-03-03 20:20:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:31,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:31,955 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:20:31,955 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 22 treesize of output 47 [2022-03-03 20:20:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:32,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085374713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:32,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:32,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-03-03 20:20:32,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543050841] [2022-03-03 20:20:32,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:32,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:20:32,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:32,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:20:32,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:20:32,349 INFO L87 Difference]: Start difference. First operand 3665 states and 13141 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:33,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:33,517 INFO L93 Difference]: Finished difference Result 4946 states and 17235 transitions. [2022-03-03 20:20:33,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 20:20:33,518 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:20:33,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:33,527 INFO L225 Difference]: With dead ends: 4946 [2022-03-03 20:20:33,527 INFO L226 Difference]: Without dead ends: 4860 [2022-03-03 20:20:33,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=390, Invalid=2060, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 20:20:33,528 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 160 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 369 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:33,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 403 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1316 Invalid, 0 Unknown, 369 Unchecked, 0.6s Time] [2022-03-03 20:20:33,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4860 states. [2022-03-03 20:20:33,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4860 to 3679. [2022-03-03 20:20:33,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3679 states, 3678 states have (on average 3.5807504078303425) internal successors, (13170), 3678 states have internal predecessors, (13170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:33,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3679 states to 3679 states and 13170 transitions. [2022-03-03 20:20:33,579 INFO L78 Accepts]: Start accepts. Automaton has 3679 states and 13170 transitions. Word has length 26 [2022-03-03 20:20:33,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:33,579 INFO L470 AbstractCegarLoop]: Abstraction has 3679 states and 13170 transitions. [2022-03-03 20:20:33,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:33,579 INFO L276 IsEmpty]: Start isEmpty. Operand 3679 states and 13170 transitions. [2022-03-03 20:20:33,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:20:33,584 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:33,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:33,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-03 20:20:33,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:33,784 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:20:33,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:33,785 INFO L85 PathProgramCache]: Analyzing trace with hash 65573818, now seen corresponding path program 50 times [2022-03-03 20:20:33,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:33,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284862809] [2022-03-03 20:20:33,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:33,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:33,979 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:33,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284862809] [2022-03-03 20:20:33,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284862809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:33,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125037964] [2022-03-03 20:20:33,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:20:33,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:33,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:33,981 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:33,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-03 20:20:34,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:20:34,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:20:34,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:20:34,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:34,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:34,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:34,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:34,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:34,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-03-03 20:20:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:34,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:34,407 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:20:34,408 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 22 treesize of output 47 [2022-03-03 20:20:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:34,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125037964] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:34,585 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:34,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-03 20:20:34,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240182717] [2022-03-03 20:20:34,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:34,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:20:34,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:34,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:20:34,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:20:34,586 INFO L87 Difference]: Start difference. First operand 3679 states and 13170 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:35,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:35,456 INFO L93 Difference]: Finished difference Result 4996 states and 17400 transitions. [2022-03-03 20:20:35,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 20:20:35,456 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:20:35,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:35,465 INFO L225 Difference]: With dead ends: 4996 [2022-03-03 20:20:35,465 INFO L226 Difference]: Without dead ends: 4966 [2022-03-03 20:20:35,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=361, Invalid=1991, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 20:20:35,466 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 149 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:35,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 267 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:20:35,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4966 states. [2022-03-03 20:20:35,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4966 to 3665. [2022-03-03 20:20:35,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3665 states, 3664 states have (on average 3.5848799126637556) internal successors, (13135), 3664 states have internal predecessors, (13135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:35,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 13135 transitions. [2022-03-03 20:20:35,525 INFO L78 Accepts]: Start accepts. Automaton has 3665 states and 13135 transitions. Word has length 26 [2022-03-03 20:20:35,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:35,525 INFO L470 AbstractCegarLoop]: Abstraction has 3665 states and 13135 transitions. [2022-03-03 20:20:35,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:35,525 INFO L276 IsEmpty]: Start isEmpty. Operand 3665 states and 13135 transitions. [2022-03-03 20:20:35,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:20:35,530 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:35,530 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:35,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-03 20:20:35,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-03-03 20:20:35,731 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:20:35,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:35,731 INFO L85 PathProgramCache]: Analyzing trace with hash -308346528, now seen corresponding path program 51 times [2022-03-03 20:20:35,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:35,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694852290] [2022-03-03 20:20:35,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:35,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:35,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:35,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694852290] [2022-03-03 20:20:35,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694852290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:35,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841786210] [2022-03-03 20:20:35,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:20:35,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:35,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:35,953 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:35,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-03 20:20:35,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:20:35,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:20:35,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:20:35,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:36,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:36,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:36,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:36,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:20:36,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 48 [2022-03-03 20:20:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:36,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:36,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:36,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:36,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:36,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:20:36,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-03-03 20:20:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:36,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841786210] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:36,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:36,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:20:36,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585283787] [2022-03-03 20:20:36,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:36,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:20:36,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:36,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:20:36,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:20:36,580 INFO L87 Difference]: Start difference. First operand 3665 states and 13135 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:37,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:37,829 INFO L93 Difference]: Finished difference Result 4946 states and 17322 transitions. [2022-03-03 20:20:37,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 20:20:37,830 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:20:37,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:37,838 INFO L225 Difference]: With dead ends: 4946 [2022-03-03 20:20:37,839 INFO L226 Difference]: Without dead ends: 4916 [2022-03-03 20:20:37,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=540, Invalid=2652, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 20:20:37,839 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 184 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:37,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 242 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1133 Invalid, 0 Unknown, 33 Unchecked, 0.5s Time] [2022-03-03 20:20:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4916 states. [2022-03-03 20:20:37,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4916 to 3772. [2022-03-03 20:20:37,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3772 states, 3771 states have (on average 3.592150623176876) internal successors, (13546), 3771 states have internal predecessors, (13546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:37,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3772 states to 3772 states and 13546 transitions. [2022-03-03 20:20:37,898 INFO L78 Accepts]: Start accepts. Automaton has 3772 states and 13546 transitions. Word has length 26 [2022-03-03 20:20:37,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:37,898 INFO L470 AbstractCegarLoop]: Abstraction has 3772 states and 13546 transitions. [2022-03-03 20:20:37,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:37,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3772 states and 13546 transitions. [2022-03-03 20:20:37,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:20:37,904 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:37,904 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:37,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-03 20:20:38,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-03-03 20:20:38,104 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:20:38,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:38,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1165871128, now seen corresponding path program 52 times [2022-03-03 20:20:38,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:38,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995533017] [2022-03-03 20:20:38,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:38,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:38,359 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:38,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995533017] [2022-03-03 20:20:38,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995533017] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:38,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766109265] [2022-03-03 20:20:38,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:20:38,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:38,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:38,372 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:38,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-03 20:20:38,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:20:38,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:20:38,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:20:38,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:38,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:38,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:38,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:38,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:38,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-03-03 20:20:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:38,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:38,774 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:20:38,775 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 22 treesize of output 47 [2022-03-03 20:20:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:38,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766109265] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:38,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:38,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-03-03 20:20:38,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949995162] [2022-03-03 20:20:38,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:38,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:20:38,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:38,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:20:38,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:20:38,927 INFO L87 Difference]: Start difference. First operand 3772 states and 13546 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:39,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:39,341 INFO L93 Difference]: Finished difference Result 4582 states and 16225 transitions. [2022-03-03 20:20:39,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 20:20:39,341 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:20:39,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:39,349 INFO L225 Difference]: With dead ends: 4582 [2022-03-03 20:20:39,349 INFO L226 Difference]: Without dead ends: 4567 [2022-03-03 20:20:39,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 20:20:39,350 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 109 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:39,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 221 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 375 Invalid, 0 Unknown, 351 Unchecked, 0.2s Time] [2022-03-03 20:20:39,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4567 states. [2022-03-03 20:20:39,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4567 to 3782. [2022-03-03 20:20:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3782 states, 3781 states have (on average 3.5919069029357313) internal successors, (13581), 3781 states have internal predecessors, (13581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:39,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3782 states to 3782 states and 13581 transitions. [2022-03-03 20:20:39,401 INFO L78 Accepts]: Start accepts. Automaton has 3782 states and 13581 transitions. Word has length 26 [2022-03-03 20:20:39,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:39,401 INFO L470 AbstractCegarLoop]: Abstraction has 3782 states and 13581 transitions. [2022-03-03 20:20:39,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:39,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3782 states and 13581 transitions. [2022-03-03 20:20:39,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:20:39,406 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:39,406 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:39,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-03 20:20:39,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:39,607 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:20:39,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:39,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1961622048, now seen corresponding path program 56 times [2022-03-03 20:20:39,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:39,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369178528] [2022-03-03 20:20:39,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:39,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:39,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:39,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369178528] [2022-03-03 20:20:39,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369178528] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:39,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128278362] [2022-03-03 20:20:39,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:20:39,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:39,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:39,795 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:39,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-03 20:20:39,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:20:39,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:20:39,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:20:39,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:40,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:40,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:20:40,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-03-03 20:20:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:40,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:40,330 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:20:40,330 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 21 treesize of output 56 [2022-03-03 20:20:40,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:40,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:40,493 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:20:40,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:20:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:40,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128278362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:40,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:40,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-03 20:20:40,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973695196] [2022-03-03 20:20:40,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:40,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:20:40,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:40,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:20:40,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:20:40,714 INFO L87 Difference]: Start difference. First operand 3782 states and 13581 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:44,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:44,701 INFO L93 Difference]: Finished difference Result 7327 states and 24308 transitions. [2022-03-03 20:20:44,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-03 20:20:44,701 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:20:44,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:44,714 INFO L225 Difference]: With dead ends: 7327 [2022-03-03 20:20:44,714 INFO L226 Difference]: Without dead ends: 7297 [2022-03-03 20:20:44,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2338 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1078, Invalid=6062, Unknown=0, NotChecked=0, Total=7140 [2022-03-03 20:20:44,715 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 445 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 2481 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 2549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:44,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 608 Invalid, 2549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2481 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 20:20:44,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7297 states. [2022-03-03 20:20:44,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7297 to 3823. [2022-03-03 20:20:44,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3823 states, 3822 states have (on average 3.5907901622187337) internal successors, (13724), 3822 states have internal predecessors, (13724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:44,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3823 states to 3823 states and 13724 transitions. [2022-03-03 20:20:44,785 INFO L78 Accepts]: Start accepts. Automaton has 3823 states and 13724 transitions. Word has length 26 [2022-03-03 20:20:44,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:44,785 INFO L470 AbstractCegarLoop]: Abstraction has 3823 states and 13724 transitions. [2022-03-03 20:20:44,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:44,786 INFO L276 IsEmpty]: Start isEmpty. Operand 3823 states and 13724 transitions. [2022-03-03 20:20:44,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:20:44,791 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:44,791 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:44,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-03 20:20:44,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:44,995 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:20:44,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:44,995 INFO L85 PathProgramCache]: Analyzing trace with hash -411240484, now seen corresponding path program 53 times [2022-03-03 20:20:44,995 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:44,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469871174] [2022-03-03 20:20:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:44,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:45,152 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:45,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469871174] [2022-03-03 20:20:45,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469871174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:45,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281518989] [2022-03-03 20:20:45,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:20:45,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:45,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:45,153 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:45,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-03 20:20:45,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:20:45,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:20:45,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:20:45,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:45,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:45,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:45,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:45,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-03-03 20:20:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:45,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:45,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:45,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:45,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:45,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:20:45,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-03-03 20:20:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:45,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281518989] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:45,675 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:45,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 20:20:45,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238212889] [2022-03-03 20:20:45,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:45,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:20:45,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:45,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:20:45,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:20:45,676 INFO L87 Difference]: Start difference. First operand 3823 states and 13724 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:46,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:46,965 INFO L93 Difference]: Finished difference Result 5770 states and 19224 transitions. [2022-03-03 20:20:46,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 20:20:46,965 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:20:46,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:46,976 INFO L225 Difference]: With dead ends: 5770 [2022-03-03 20:20:46,976 INFO L226 Difference]: Without dead ends: 5710 [2022-03-03 20:20:46,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=641, Invalid=2781, Unknown=0, NotChecked=0, Total=3422 [2022-03-03 20:20:46,976 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 441 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:46,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 319 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:20:46,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5710 states. [2022-03-03 20:20:47,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5710 to 3968. [2022-03-03 20:20:47,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 3.596672548525334) internal successors, (14268), 3967 states have internal predecessors, (14268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:47,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 14268 transitions. [2022-03-03 20:20:47,049 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 14268 transitions. Word has length 26 [2022-03-03 20:20:47,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:47,049 INFO L470 AbstractCegarLoop]: Abstraction has 3968 states and 14268 transitions. [2022-03-03 20:20:47,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:47,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 14268 transitions. [2022-03-03 20:20:47,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:20:47,055 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:47,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:47,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-03 20:20:47,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2022-03-03 20:20:47,255 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:20:47,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:47,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1423144386, now seen corresponding path program 54 times [2022-03-03 20:20:47,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:47,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78487027] [2022-03-03 20:20:47,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:47,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:47,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:47,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78487027] [2022-03-03 20:20:47,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78487027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:47,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146091336] [2022-03-03 20:20:47,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:20:47,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:47,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:47,413 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:47,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-03 20:20:47,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:20:47,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:20:47,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-03 20:20:47,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:47,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:47,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:47,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:47,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-03-03 20:20:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:47,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:47,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:47,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:47,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:47,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:47,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-03 20:20:48,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:48,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-03 20:20:48,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:48,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-03 20:20:48,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:48,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-03 20:20:48,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:48,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-03 20:20:48,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:48,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-03 20:20:48,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:48,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-03 20:20:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:20:48,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146091336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:48,134 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:48,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 27 [2022-03-03 20:20:48,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376358254] [2022-03-03 20:20:48,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:48,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:20:48,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:48,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:20:48,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:20:48,135 INFO L87 Difference]: Start difference. First operand 3968 states and 14268 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:50,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:50,910 INFO L93 Difference]: Finished difference Result 9552 states and 31345 transitions. [2022-03-03 20:20:50,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-03 20:20:50,910 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:20:50,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:50,928 INFO L225 Difference]: With dead ends: 9552 [2022-03-03 20:20:50,928 INFO L226 Difference]: Without dead ends: 9467 [2022-03-03 20:20:50,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 28 SyntacticMatches, 8 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1560, Invalid=7182, Unknown=0, NotChecked=0, Total=8742 [2022-03-03 20:20:50,929 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 455 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 2047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:50,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 546 Invalid, 2047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1672 Invalid, 0 Unknown, 288 Unchecked, 0.9s Time] [2022-03-03 20:20:50,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9467 states. [2022-03-03 20:20:51,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9467 to 4484. [2022-03-03 20:20:51,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4484 states, 4483 states have (on average 3.6165514164621904) internal successors, (16213), 4483 states have internal predecessors, (16213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:51,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4484 states to 4484 states and 16213 transitions. [2022-03-03 20:20:51,032 INFO L78 Accepts]: Start accepts. Automaton has 4484 states and 16213 transitions. Word has length 26 [2022-03-03 20:20:51,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:51,032 INFO L470 AbstractCegarLoop]: Abstraction has 4484 states and 16213 transitions. [2022-03-03 20:20:51,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:51,032 INFO L276 IsEmpty]: Start isEmpty. Operand 4484 states and 16213 transitions. [2022-03-03 20:20:51,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:20:51,039 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:51,039 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:51,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-03 20:20:51,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-03 20:20:51,240 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:20:51,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:51,240 INFO L85 PathProgramCache]: Analyzing trace with hash -579049576, now seen corresponding path program 55 times [2022-03-03 20:20:51,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:51,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520110443] [2022-03-03 20:20:51,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:51,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:51,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:51,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520110443] [2022-03-03 20:20:51,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520110443] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:51,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067737625] [2022-03-03 20:20:51,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:20:51,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:51,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:51,395 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:51,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-03 20:20:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:51,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:20:51,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:51,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:51,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:20:51,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:51,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:20:51,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-03-03 20:20:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:51,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:51,869 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:20:51,869 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 22 treesize of output 47 [2022-03-03 20:20:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:52,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067737625] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:52,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:52,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-03-03 20:20:52,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328855253] [2022-03-03 20:20:52,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:52,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:20:52,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:52,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:20:52,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:20:52,011 INFO L87 Difference]: Start difference. First operand 4484 states and 16213 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:57,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:20:57,164 INFO L93 Difference]: Finished difference Result 9683 states and 32510 transitions. [2022-03-03 20:20:57,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-03 20:20:57,165 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:20:57,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:20:57,182 INFO L225 Difference]: With dead ends: 9683 [2022-03-03 20:20:57,182 INFO L226 Difference]: Without dead ends: 9592 [2022-03-03 20:20:57,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5303 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2221, Invalid=12541, Unknown=0, NotChecked=0, Total=14762 [2022-03-03 20:20:57,183 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 448 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 2496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:20:57,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 696 Invalid, 2496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 20:20:57,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9592 states. [2022-03-03 20:20:57,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9592 to 4636. [2022-03-03 20:20:57,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 3.6306364617044227) internal successors, (16828), 4635 states have internal predecessors, (16828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:57,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 16828 transitions. [2022-03-03 20:20:57,280 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 16828 transitions. Word has length 26 [2022-03-03 20:20:57,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:20:57,280 INFO L470 AbstractCegarLoop]: Abstraction has 4636 states and 16828 transitions. [2022-03-03 20:20:57,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:20:57,280 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 16828 transitions. [2022-03-03 20:20:57,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:20:57,287 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:20:57,287 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:20:57,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-03 20:20:57,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-03 20:20:57,487 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:20:57,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:20:57,487 INFO L85 PathProgramCache]: Analyzing trace with hash -796062908, now seen corresponding path program 57 times [2022-03-03 20:20:57,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:20:57,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748426267] [2022-03-03 20:20:57,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:20:57,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:20:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:20:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:57,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:20:57,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748426267] [2022-03-03 20:20:57,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748426267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:20:57,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435115463] [2022-03-03 20:20:57,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:20:57,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:20:57,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:20:57,658 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:20:57,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-03 20:20:57,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:20:57,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:20:57,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:20:57,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:20:58,013 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:20:58,013 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 33 treesize of output 49 [2022-03-03 20:20:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:58,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:20:58,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:20:58,593 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 38 treesize of output 71 [2022-03-03 20:20:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:20:59,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435115463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:20:59,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:20:59,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2022-03-03 20:20:59,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640265949] [2022-03-03 20:20:59,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:20:59,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:20:59,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:20:59,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:20:59,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:20:59,517 INFO L87 Difference]: Start difference. First operand 4636 states and 16828 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:01,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:21:01,613 INFO L93 Difference]: Finished difference Result 8331 states and 28855 transitions. [2022-03-03 20:21:01,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 20:21:01,614 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:21:01,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:21:01,665 INFO L225 Difference]: With dead ends: 8331 [2022-03-03 20:21:01,666 INFO L226 Difference]: Without dead ends: 8301 [2022-03-03 20:21:01,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=585, Invalid=3837, Unknown=0, NotChecked=0, Total=4422 [2022-03-03 20:21:01,666 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 254 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 960 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:21:01,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 626 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 996 Invalid, 0 Unknown, 960 Unchecked, 0.5s Time] [2022-03-03 20:21:01,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8301 states. [2022-03-03 20:21:01,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8301 to 4655. [2022-03-03 20:21:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 3.6304254404813063) internal successors, (16896), 4654 states have internal predecessors, (16896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:01,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 16896 transitions. [2022-03-03 20:21:01,767 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 16896 transitions. Word has length 26 [2022-03-03 20:21:01,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:21:01,767 INFO L470 AbstractCegarLoop]: Abstraction has 4655 states and 16896 transitions. [2022-03-03 20:21:01,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:01,767 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 16896 transitions. [2022-03-03 20:21:01,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:21:01,774 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:21:01,774 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:21:01,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-03-03 20:21:01,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-03 20:21:01,975 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:21:01,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:21:01,975 INFO L85 PathProgramCache]: Analyzing trace with hash 2004996666, now seen corresponding path program 58 times [2022-03-03 20:21:01,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:21:01,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993289042] [2022-03-03 20:21:01,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:21:01,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:21:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:21:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:02,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:21:02,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993289042] [2022-03-03 20:21:02,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993289042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:21:02,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235170321] [2022-03-03 20:21:02,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:21:02,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:02,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:21:02,148 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:21:02,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-03 20:21:02,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:21:02,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:21:02,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:21:02,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:21:02,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:21:02,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:02,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-03 20:21:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:02,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:21:02,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:21:02,736 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 38 treesize of output 71 [2022-03-03 20:21:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:03,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235170321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:21:03,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:21:03,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:21:03,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174674418] [2022-03-03 20:21:03,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:21:03,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:21:03,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:21:03,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:21:03,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:21:03,556 INFO L87 Difference]: Start difference. First operand 4655 states and 16896 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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) [2022-03-03 20:21:05,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:21:05,694 INFO L93 Difference]: Finished difference Result 8027 states and 27505 transitions. [2022-03-03 20:21:05,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 20:21:05,694 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:21:05,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:21:05,709 INFO L225 Difference]: With dead ends: 8027 [2022-03-03 20:21:05,709 INFO L226 Difference]: Without dead ends: 8000 [2022-03-03 20:21:05,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=720, Invalid=3312, Unknown=0, NotChecked=0, Total=4032 [2022-03-03 20:21:05,710 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 340 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 548 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:21:05,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 359 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 869 Invalid, 0 Unknown, 548 Unchecked, 0.4s Time] [2022-03-03 20:21:05,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8000 states. [2022-03-03 20:21:05,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8000 to 4709. [2022-03-03 20:21:05,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4709 states, 4708 states have (on average 3.6319031435853866) internal successors, (17099), 4708 states have internal predecessors, (17099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:05,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4709 states to 4709 states and 17099 transitions. [2022-03-03 20:21:05,798 INFO L78 Accepts]: Start accepts. Automaton has 4709 states and 17099 transitions. Word has length 26 [2022-03-03 20:21:05,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:21:05,798 INFO L470 AbstractCegarLoop]: Abstraction has 4709 states and 17099 transitions. [2022-03-03 20:21:05,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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) [2022-03-03 20:21:05,799 INFO L276 IsEmpty]: Start isEmpty. Operand 4709 states and 17099 transitions. [2022-03-03 20:21:05,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:21:05,805 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:21:05,805 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:21:05,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-03 20:21:06,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:06,006 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:21:06,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:21:06,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1881371608, now seen corresponding path program 59 times [2022-03-03 20:21:06,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:21:06,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834595028] [2022-03-03 20:21:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:21:06,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:21:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:21:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:06,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:21:06,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834595028] [2022-03-03 20:21:06,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834595028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:21:06,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604276483] [2022-03-03 20:21:06,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:21:06,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:06,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:21:06,163 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:21:06,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-03 20:21:06,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:21:06,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:21:06,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:21:06,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:21:06,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:21:06,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:21:06,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-03 20:21:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:06,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:21:06,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:06,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:21:06,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 56 [2022-03-03 20:21:06,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:06,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:06,820 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:21:06,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:21:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:07,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604276483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:21:07,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:21:07,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-03 20:21:07,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354208322] [2022-03-03 20:21:07,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:21:07,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:21:07,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:21:07,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:21:07,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:21:07,051 INFO L87 Difference]: Start difference. First operand 4709 states and 17099 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:11,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:21:11,008 INFO L93 Difference]: Finished difference Result 9704 states and 33509 transitions. [2022-03-03 20:21:11,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-03 20:21:11,008 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:21:11,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:21:11,028 INFO L225 Difference]: With dead ends: 9704 [2022-03-03 20:21:11,028 INFO L226 Difference]: Without dead ends: 9674 [2022-03-03 20:21:11,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3541 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1437, Invalid=7683, Unknown=0, NotChecked=0, Total=9120 [2022-03-03 20:21:11,029 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 369 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 2292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 956 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:21:11,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 536 Invalid, 2292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1270 Invalid, 0 Unknown, 956 Unchecked, 0.7s Time] [2022-03-03 20:21:11,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9674 states. [2022-03-03 20:21:11,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9674 to 4733. [2022-03-03 20:21:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4733 states, 4732 states have (on average 3.6377852916314453) internal successors, (17214), 4732 states have internal predecessors, (17214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:11,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4733 states to 4733 states and 17214 transitions. [2022-03-03 20:21:11,134 INFO L78 Accepts]: Start accepts. Automaton has 4733 states and 17214 transitions. Word has length 26 [2022-03-03 20:21:11,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:21:11,134 INFO L470 AbstractCegarLoop]: Abstraction has 4733 states and 17214 transitions. [2022-03-03 20:21:11,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:11,134 INFO L276 IsEmpty]: Start isEmpty. Operand 4733 states and 17214 transitions. [2022-03-03 20:21:11,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:21:11,159 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:21:11,159 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:21:11,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-03 20:21:11,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:11,359 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:21:11,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:21:11,360 INFO L85 PathProgramCache]: Analyzing trace with hash -366047686, now seen corresponding path program 60 times [2022-03-03 20:21:11,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:21:11,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419096677] [2022-03-03 20:21:11,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:21:11,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:21:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:21:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:11,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:21:11,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419096677] [2022-03-03 20:21:11,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419096677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:21:11,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910628917] [2022-03-03 20:21:11,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:21:11,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:11,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:21:11,524 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:21:11,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-03 20:21:11,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:21:11,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:21:11,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:21:11,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:21:11,840 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 20:21:11,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 68 [2022-03-03 20:21:12,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:12,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:21:12,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:21:12,263 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 38 treesize of output 71 [2022-03-03 20:21:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:13,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910628917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:21:13,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:21:13,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-03-03 20:21:13,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138265876] [2022-03-03 20:21:13,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:21:13,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:21:13,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:21:13,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:21:13,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:21:13,187 INFO L87 Difference]: Start difference. First operand 4733 states and 17214 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:21:16,857 INFO L93 Difference]: Finished difference Result 9076 states and 30926 transitions. [2022-03-03 20:21:16,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 20:21:16,857 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:21:16,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:21:16,874 INFO L225 Difference]: With dead ends: 9076 [2022-03-03 20:21:16,874 INFO L226 Difference]: Without dead ends: 9040 [2022-03-03 20:21:16,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=960, Invalid=5046, Unknown=0, NotChecked=0, Total=6006 [2022-03-03 20:21:16,874 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 419 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1850 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 434 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:21:16,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 572 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1850 Invalid, 0 Unknown, 434 Unchecked, 0.9s Time] [2022-03-03 20:21:16,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9040 states. [2022-03-03 20:21:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9040 to 4724. [2022-03-03 20:21:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4724 states, 4723 states have (on average 3.6351894982002966) internal successors, (17169), 4723 states have internal predecessors, (17169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:16,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4724 states to 4724 states and 17169 transitions. [2022-03-03 20:21:16,967 INFO L78 Accepts]: Start accepts. Automaton has 4724 states and 17169 transitions. Word has length 26 [2022-03-03 20:21:16,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:21:16,967 INFO L470 AbstractCegarLoop]: Abstraction has 4724 states and 17169 transitions. [2022-03-03 20:21:16,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:16,968 INFO L276 IsEmpty]: Start isEmpty. Operand 4724 states and 17169 transitions. [2022-03-03 20:21:16,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:21:16,974 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:21:16,974 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:21:16,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-03 20:21:17,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-03-03 20:21:17,175 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:21:17,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:21:17,175 INFO L85 PathProgramCache]: Analyzing trace with hash 191428704, now seen corresponding path program 61 times [2022-03-03 20:21:17,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:21:17,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147769195] [2022-03-03 20:21:17,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:21:17,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:21:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:21:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:17,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:21:17,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147769195] [2022-03-03 20:21:17,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147769195] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:21:17,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344400192] [2022-03-03 20:21:17,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:21:17,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:17,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:21:17,339 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:21:17,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-03 20:21:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:21:17,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:21:17,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:21:17,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:21:17,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:21:17,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 30 [2022-03-03 20:21:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:17,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:21:17,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:21:17,938 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 37 treesize of output 70 [2022-03-03 20:21:18,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:18,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344400192] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:21:18,888 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:21:18,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-03 20:21:18,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643738100] [2022-03-03 20:21:18,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:21:18,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:21:18,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:21:18,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:21:18,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:21:18,888 INFO L87 Difference]: Start difference. First operand 4724 states and 17169 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:21,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:21:21,764 INFO L93 Difference]: Finished difference Result 8456 states and 28732 transitions. [2022-03-03 20:21:21,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:21:21,765 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:21:21,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:21:21,781 INFO L225 Difference]: With dead ends: 8456 [2022-03-03 20:21:21,781 INFO L226 Difference]: Without dead ends: 8380 [2022-03-03 20:21:21,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=876, Invalid=3816, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 20:21:21,781 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 356 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:21:21,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 389 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 893 Invalid, 0 Unknown, 393 Unchecked, 0.5s Time] [2022-03-03 20:21:21,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8380 states. [2022-03-03 20:21:21,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8380 to 4717. [2022-03-03 20:21:21,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4717 states, 4716 states have (on average 3.639100932994063) internal successors, (17162), 4716 states have internal predecessors, (17162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4717 states to 4717 states and 17162 transitions. [2022-03-03 20:21:21,870 INFO L78 Accepts]: Start accepts. Automaton has 4717 states and 17162 transitions. Word has length 26 [2022-03-03 20:21:21,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:21:21,870 INFO L470 AbstractCegarLoop]: Abstraction has 4717 states and 17162 transitions. [2022-03-03 20:21:21,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:21,870 INFO L276 IsEmpty]: Start isEmpty. Operand 4717 states and 17162 transitions. [2022-03-03 20:21:21,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:21:21,878 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:21:21,878 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:21:21,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-03-03 20:21:22,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:22,078 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:21:22,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:21:22,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1205769994, now seen corresponding path program 56 times [2022-03-03 20:21:22,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:21:22,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130685759] [2022-03-03 20:21:22,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:21:22,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:21:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:21:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:22,256 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:21:22,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130685759] [2022-03-03 20:21:22,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130685759] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:21:22,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750984536] [2022-03-03 20:21:22,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:21:22,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:22,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:21:22,257 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:21:22,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-03 20:21:22,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:21:22,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:21:22,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:21:22,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:21:22,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:21:22,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:22,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:21:22,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:22,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-03-03 20:21:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:22,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:21:22,746 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:21:22,746 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 22 treesize of output 47 [2022-03-03 20:21:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:22,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750984536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:21:22,931 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:21:22,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-03-03 20:21:22,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305303679] [2022-03-03 20:21:22,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:21:22,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:21:22,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:21:22,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:21:22,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:21:22,931 INFO L87 Difference]: Start difference. First operand 4717 states and 17162 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 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) [2022-03-03 20:21:25,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:21:25,802 INFO L93 Difference]: Finished difference Result 7064 states and 24569 transitions. [2022-03-03 20:21:25,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 20:21:25,803 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 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 26 [2022-03-03 20:21:25,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:21:25,816 INFO L225 Difference]: With dead ends: 7064 [2022-03-03 20:21:25,816 INFO L226 Difference]: Without dead ends: 7006 [2022-03-03 20:21:25,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2200 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1100, Invalid=5872, Unknown=0, NotChecked=0, Total=6972 [2022-03-03 20:21:25,817 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 253 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 1976 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 2037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:21:25,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 538 Invalid, 2037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1976 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:21:25,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7006 states. [2022-03-03 20:21:25,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7006 to 4725. [2022-03-03 20:21:25,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4725 states, 4724 states have (on average 3.63653683319221) internal successors, (17179), 4724 states have internal predecessors, (17179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:25,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4725 states to 4725 states and 17179 transitions. [2022-03-03 20:21:25,923 INFO L78 Accepts]: Start accepts. Automaton has 4725 states and 17179 transitions. Word has length 26 [2022-03-03 20:21:25,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:21:25,923 INFO L470 AbstractCegarLoop]: Abstraction has 4725 states and 17179 transitions. [2022-03-03 20:21:25,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 23 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) [2022-03-03 20:21:25,923 INFO L276 IsEmpty]: Start isEmpty. Operand 4725 states and 17179 transitions. [2022-03-03 20:21:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:21:25,930 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:21:25,930 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:21:25,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-03 20:21:26,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:26,131 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:21:26,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:21:26,131 INFO L85 PathProgramCache]: Analyzing trace with hash -280276128, now seen corresponding path program 57 times [2022-03-03 20:21:26,131 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:21:26,131 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272448169] [2022-03-03 20:21:26,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:21:26,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:21:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:21:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:26,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:21:26,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272448169] [2022-03-03 20:21:26,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272448169] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:21:26,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728544508] [2022-03-03 20:21:26,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:21:26,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:26,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:21:26,307 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:21:26,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-03 20:21:26,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:21:26,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:21:26,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:21:26,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:21:26,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:21:26,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:21:26,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:21:26,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2022-03-03 20:21:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:26,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:21:26,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:26,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:26,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:26,731 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:21:26,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-03-03 20:21:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:26,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728544508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:21:26,827 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:21:26,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 20:21:26,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107983811] [2022-03-03 20:21:26,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:21:26,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:21:26,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:21:26,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:21:26,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:21:26,827 INFO L87 Difference]: Start difference. First operand 4725 states and 17179 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:27,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:21:27,516 INFO L93 Difference]: Finished difference Result 6033 states and 21472 transitions. [2022-03-03 20:21:27,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 20:21:27,516 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:21:27,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:21:27,527 INFO L225 Difference]: With dead ends: 6033 [2022-03-03 20:21:27,527 INFO L226 Difference]: Without dead ends: 5981 [2022-03-03 20:21:27,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 20:21:27,527 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 182 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:21:27,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 457 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 496 Invalid, 0 Unknown, 153 Unchecked, 0.2s Time] [2022-03-03 20:21:27,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5981 states. [2022-03-03 20:21:27,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5981 to 4778. [2022-03-03 20:21:27,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4778 states, 4777 states have (on average 3.633661293698974) internal successors, (17358), 4777 states have internal predecessors, (17358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:27,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4778 states to 4778 states and 17358 transitions. [2022-03-03 20:21:27,620 INFO L78 Accepts]: Start accepts. Automaton has 4778 states and 17358 transitions. Word has length 26 [2022-03-03 20:21:27,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:21:27,620 INFO L470 AbstractCegarLoop]: Abstraction has 4778 states and 17358 transitions. [2022-03-03 20:21:27,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:27,620 INFO L276 IsEmpty]: Start isEmpty. Operand 4778 states and 17358 transitions. [2022-03-03 20:21:27,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:21:27,627 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:21:27,627 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:21:27,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-03-03 20:21:27,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-03-03 20:21:27,827 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:21:27,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:21:27,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1193941528, now seen corresponding path program 58 times [2022-03-03 20:21:27,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:21:27,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432065099] [2022-03-03 20:21:27,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:21:27,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:21:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:21:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:28,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:21:28,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432065099] [2022-03-03 20:21:28,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432065099] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:21:28,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334117836] [2022-03-03 20:21:28,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:21:28,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:28,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:21:28,029 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:21:28,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-03 20:21:28,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:21:28,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:21:28,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:21:28,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:21:28,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:21:28,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:28,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:28,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 21 [2022-03-03 20:21:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:28,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:21:28,516 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:21:28,517 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 22 treesize of output 47 [2022-03-03 20:21:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:28,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334117836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:21:28,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:21:28,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-03-03 20:21:28,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206007173] [2022-03-03 20:21:28,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:21:28,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:21:28,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:21:28,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:21:28,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:21:28,699 INFO L87 Difference]: Start difference. First operand 4778 states and 17358 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:33,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:21:33,076 INFO L93 Difference]: Finished difference Result 8015 states and 27403 transitions. [2022-03-03 20:21:33,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-03 20:21:33,077 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:21:33,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:21:33,092 INFO L225 Difference]: With dead ends: 8015 [2022-03-03 20:21:33,092 INFO L226 Difference]: Without dead ends: 7890 [2022-03-03 20:21:33,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4229 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1865, Invalid=10345, Unknown=0, NotChecked=0, Total=12210 [2022-03-03 20:21:33,093 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 294 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 2268 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 2450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 20:21:33,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 529 Invalid, 2450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2268 Invalid, 0 Unknown, 104 Unchecked, 1.0s Time] [2022-03-03 20:21:33,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7890 states. [2022-03-03 20:21:33,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7890 to 4841. [2022-03-03 20:21:33,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4841 states, 4840 states have (on average 3.628512396694215) internal successors, (17562), 4840 states have internal predecessors, (17562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:33,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4841 states to 4841 states and 17562 transitions. [2022-03-03 20:21:33,199 INFO L78 Accepts]: Start accepts. Automaton has 4841 states and 17562 transitions. Word has length 26 [2022-03-03 20:21:33,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:21:33,200 INFO L470 AbstractCegarLoop]: Abstraction has 4841 states and 17562 transitions. [2022-03-03 20:21:33,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:33,200 INFO L276 IsEmpty]: Start isEmpty. Operand 4841 states and 17562 transitions. [2022-03-03 20:21:33,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:21:33,206 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:21:33,206 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:21:33,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-03 20:21:33,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:33,408 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:21:33,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:21:33,409 INFO L85 PathProgramCache]: Analyzing trace with hash 375467984, now seen corresponding path program 59 times [2022-03-03 20:21:33,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:21:33,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505002018] [2022-03-03 20:21:33,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:21:33,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:21:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:21:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:33,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:21:33,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505002018] [2022-03-03 20:21:33,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505002018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:21:33,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066256160] [2022-03-03 20:21:33,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:21:33,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:33,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:21:33,595 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:21:33,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-03 20:21:33,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:21:33,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:21:33,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:21:33,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:21:33,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:21:33,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:21:33,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:21:33,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2022-03-03 20:21:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:33,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:21:34,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:34,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:34,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:34,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:21:34,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-03-03 20:21:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:34,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066256160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:21:34,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:21:34,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 20:21:34,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867181876] [2022-03-03 20:21:34,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:21:34,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:21:34,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:21:34,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:21:34,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:21:34,131 INFO L87 Difference]: Start difference. First operand 4841 states and 17562 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:35,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:21:35,982 INFO L93 Difference]: Finished difference Result 7445 states and 25744 transitions. [2022-03-03 20:21:35,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 20:21:35,982 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:21:35,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:21:35,997 INFO L225 Difference]: With dead ends: 7445 [2022-03-03 20:21:35,997 INFO L226 Difference]: Without dead ends: 7389 [2022-03-03 20:21:35,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=830, Invalid=3202, Unknown=0, NotChecked=0, Total=4032 [2022-03-03 20:21:35,998 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 385 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:21:35,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 385 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1127 Invalid, 0 Unknown, 125 Unchecked, 0.5s Time] [2022-03-03 20:21:36,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7389 states. [2022-03-03 20:21:36,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7389 to 4897. [2022-03-03 20:21:36,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4897 states, 4896 states have (on average 3.631331699346405) internal successors, (17779), 4896 states have internal predecessors, (17779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4897 states to 4897 states and 17779 transitions. [2022-03-03 20:21:36,090 INFO L78 Accepts]: Start accepts. Automaton has 4897 states and 17779 transitions. Word has length 26 [2022-03-03 20:21:36,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:21:36,090 INFO L470 AbstractCegarLoop]: Abstraction has 4897 states and 17779 transitions. [2022-03-03 20:21:36,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:36,090 INFO L276 IsEmpty]: Start isEmpty. Operand 4897 states and 17779 transitions. [2022-03-03 20:21:36,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:21:36,097 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:21:36,097 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:21:36,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-03 20:21:36,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:36,298 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:21:36,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:21:36,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1074760440, now seen corresponding path program 62 times [2022-03-03 20:21:36,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:21:36,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884493877] [2022-03-03 20:21:36,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:21:36,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:21:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:21:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:36,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:21:36,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884493877] [2022-03-03 20:21:36,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884493877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:21:36,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805463799] [2022-03-03 20:21:36,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:21:36,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:36,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:21:36,471 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:21:36,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-03 20:21:36,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:21:36,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:21:36,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:21:36,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:21:36,749 INFO L353 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-03-03 20:21:36,749 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 60 [2022-03-03 20:21:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:36,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:21:37,006 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:21:37,006 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 21 treesize of output 56 [2022-03-03 20:21:37,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:37,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:37,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:21:37,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:21:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:37,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805463799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:21:37,369 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:21:37,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-03 20:21:37,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815954463] [2022-03-03 20:21:37,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:21:37,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 20:21:37,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:21:37,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 20:21:37,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:21:37,370 INFO L87 Difference]: Start difference. First operand 4897 states and 17779 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:40,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:21:40,115 INFO L93 Difference]: Finished difference Result 8749 states and 29823 transitions. [2022-03-03 20:21:40,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 20:21:40,116 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:21:40,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:21:40,131 INFO L225 Difference]: With dead ends: 8749 [2022-03-03 20:21:40,131 INFO L226 Difference]: Without dead ends: 8719 [2022-03-03 20:21:40,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1626 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=728, Invalid=4822, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 20:21:40,132 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 320 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1962 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:21:40,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 429 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1962 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:21:40,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8719 states. [2022-03-03 20:21:40,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8719 to 4931. [2022-03-03 20:21:40,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4931 states, 4930 states have (on average 3.6253549695740364) internal successors, (17873), 4930 states have internal predecessors, (17873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4931 states to 4931 states and 17873 transitions. [2022-03-03 20:21:40,224 INFO L78 Accepts]: Start accepts. Automaton has 4931 states and 17873 transitions. Word has length 26 [2022-03-03 20:21:40,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:21:40,224 INFO L470 AbstractCegarLoop]: Abstraction has 4931 states and 17873 transitions. [2022-03-03 20:21:40,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:40,224 INFO L276 IsEmpty]: Start isEmpty. Operand 4931 states and 17873 transitions. [2022-03-03 20:21:40,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:21:40,231 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:21:40,231 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:21:40,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-03-03 20:21:40,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-03 20:21:40,431 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:21:40,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:21:40,431 INFO L85 PathProgramCache]: Analyzing trace with hash -87268828, now seen corresponding path program 63 times [2022-03-03 20:21:40,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:21:40,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674058241] [2022-03-03 20:21:40,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:21:40,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:21:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:21:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:40,570 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:21:40,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674058241] [2022-03-03 20:21:40,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674058241] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:21:40,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026484636] [2022-03-03 20:21:40,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:21:40,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:40,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:21:40,571 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:21:40,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-03 20:21:40,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:21:40,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:21:40,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:21:40,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:21:40,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:21:40,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:21:40,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-03-03 20:21:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:40,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:21:41,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:21:41,179 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 37 treesize of output 70 [2022-03-03 20:21:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:42,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026484636] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:21:42,107 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:21:42,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:21:42,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213455713] [2022-03-03 20:21:42,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:21:42,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:21:42,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:21:42,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:21:42,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:21:42,107 INFO L87 Difference]: Start difference. First operand 4931 states and 17873 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:44,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:21:44,444 INFO L93 Difference]: Finished difference Result 8474 states and 28894 transitions. [2022-03-03 20:21:44,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 20:21:44,444 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:21:44,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:21:44,459 INFO L225 Difference]: With dead ends: 8474 [2022-03-03 20:21:44,459 INFO L226 Difference]: Without dead ends: 8409 [2022-03-03 20:21:44,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=622, Invalid=3160, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 20:21:44,460 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 265 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:21:44,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 288 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 585 Invalid, 0 Unknown, 519 Unchecked, 0.3s Time] [2022-03-03 20:21:44,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8409 states. [2022-03-03 20:21:44,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8409 to 4961. [2022-03-03 20:21:44,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4961 states, 4960 states have (on average 3.627016129032258) internal successors, (17990), 4960 states have internal predecessors, (17990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:44,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4961 states to 4961 states and 17990 transitions. [2022-03-03 20:21:44,549 INFO L78 Accepts]: Start accepts. Automaton has 4961 states and 17990 transitions. Word has length 26 [2022-03-03 20:21:44,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:21:44,549 INFO L470 AbstractCegarLoop]: Abstraction has 4961 states and 17990 transitions. [2022-03-03 20:21:44,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:44,549 INFO L276 IsEmpty]: Start isEmpty. Operand 4961 states and 17990 transitions. [2022-03-03 20:21:44,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:21:44,556 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:21:44,556 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:21:44,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-03 20:21:44,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:44,756 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:21:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:21:44,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1872123044, now seen corresponding path program 64 times [2022-03-03 20:21:44,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:21:44,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825496721] [2022-03-03 20:21:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:21:44,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:21:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:21:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:44,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:21:44,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825496721] [2022-03-03 20:21:44,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825496721] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:21:44,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33503321] [2022-03-03 20:21:44,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:21:44,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:44,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:21:44,889 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:21:44,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-03 20:21:44,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:21:44,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:21:44,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:21:44,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:21:45,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:21:45,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:45,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-03-03 20:21:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:45,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:21:45,366 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-03 20:21:45,366 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 20 treesize of output 55 [2022-03-03 20:21:45,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:45,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:45,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:21:45,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:21:45,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:45,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33503321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:21:45,723 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:21:45,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 20:21:45,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753799191] [2022-03-03 20:21:45,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:21:45,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 20:21:45,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:21:45,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 20:21:45,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-03-03 20:21:45,724 INFO L87 Difference]: Start difference. First operand 4961 states and 17990 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:46,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:21:46,530 INFO L93 Difference]: Finished difference Result 7140 states and 24665 transitions. [2022-03-03 20:21:46,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 20:21:46,531 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:21:46,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:21:46,544 INFO L225 Difference]: With dead ends: 7140 [2022-03-03 20:21:46,544 INFO L226 Difference]: Without dead ends: 7125 [2022-03-03 20:21:46,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 20:21:46,544 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 157 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:21:46,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 328 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 744 Invalid, 0 Unknown, 38 Unchecked, 0.4s Time] [2022-03-03 20:21:46,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7125 states. [2022-03-03 20:21:46,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7125 to 4993. [2022-03-03 20:21:46,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4993 states, 4992 states have (on average 3.6235977564102564) internal successors, (18089), 4992 states have internal predecessors, (18089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4993 states to 4993 states and 18089 transitions. [2022-03-03 20:21:46,626 INFO L78 Accepts]: Start accepts. Automaton has 4993 states and 18089 transitions. Word has length 26 [2022-03-03 20:21:46,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:21:46,626 INFO L470 AbstractCegarLoop]: Abstraction has 4993 states and 18089 transitions. [2022-03-03 20:21:46,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:46,627 INFO L276 IsEmpty]: Start isEmpty. Operand 4993 states and 18089 transitions. [2022-03-03 20:21:46,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:21:46,633 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:21:46,633 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:21:46,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-03-03 20:21:46,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-03 20:21:46,834 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:21:46,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:21:46,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1446158772, now seen corresponding path program 65 times [2022-03-03 20:21:46,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:21:46,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357555325] [2022-03-03 20:21:46,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:21:46,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:21:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:21:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:46,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:21:46,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357555325] [2022-03-03 20:21:46,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357555325] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:21:46,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928135233] [2022-03-03 20:21:46,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:21:46,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:46,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:21:46,983 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:21:46,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-03 20:21:47,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:21:47,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:21:47,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 20:21:47,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:21:47,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:21:47,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:21:47,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-03-03 20:21:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:47,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:21:47,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:47,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:21:47,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 55 [2022-03-03 20:21:47,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:47,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:47,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:21:47,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:21:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:48,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928135233] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:21:48,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:21:48,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2022-03-03 20:21:48,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753618881] [2022-03-03 20:21:48,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:21:48,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 20:21:48,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:21:48,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 20:21:48,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-03-03 20:21:48,005 INFO L87 Difference]: Start difference. First operand 4993 states and 18089 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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) [2022-03-03 20:21:53,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:21:53,731 INFO L93 Difference]: Finished difference Result 16309 states and 54529 transitions. [2022-03-03 20:21:53,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-03 20:21:53,731 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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 26 [2022-03-03 20:21:53,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:21:53,763 INFO L225 Difference]: With dead ends: 16309 [2022-03-03 20:21:53,763 INFO L226 Difference]: Without dead ends: 16252 [2022-03-03 20:21:53,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 39 SyntacticMatches, 17 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5007 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2099, Invalid=10333, Unknown=0, NotChecked=0, Total=12432 [2022-03-03 20:21:53,764 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 399 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 746 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:21:53,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 551 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 960 Invalid, 0 Unknown, 746 Unchecked, 0.6s Time] [2022-03-03 20:21:53,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16252 states. [2022-03-03 20:21:53,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16252 to 5011. [2022-03-03 20:21:53,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5011 states, 5010 states have (on average 3.625748502994012) internal successors, (18165), 5010 states have internal predecessors, (18165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:21:53,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5011 states to 5011 states and 18165 transitions. [2022-03-03 20:21:53,915 INFO L78 Accepts]: Start accepts. Automaton has 5011 states and 18165 transitions. Word has length 26 [2022-03-03 20:21:53,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:21:53,915 INFO L470 AbstractCegarLoop]: Abstraction has 5011 states and 18165 transitions. [2022-03-03 20:21:53,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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) [2022-03-03 20:21:53,915 INFO L276 IsEmpty]: Start isEmpty. Operand 5011 states and 18165 transitions. [2022-03-03 20:21:53,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:21:53,922 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:21:53,922 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:21:53,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-03 20:21:54,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-03 20:21:54,123 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:21:54,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:21:54,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1897695392, now seen corresponding path program 66 times [2022-03-03 20:21:54,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:21:54,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323936751] [2022-03-03 20:21:54,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:21:54,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:21:54,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:21:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:54,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:21:54,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323936751] [2022-03-03 20:21:54,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323936751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:21:54,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433027356] [2022-03-03 20:21:54,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:21:54,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:21:54,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:21:54,299 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:21:54,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-03 20:21:54,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:21:54,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:21:54,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:21:54,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:21:54,589 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-03 20:21:54,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 62 [2022-03-03 20:21:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:55,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:21:55,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:55,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:21:55,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:21:55,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 55 [2022-03-03 20:21:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:21:55,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433027356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:21:55,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:21:55,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-03 20:21:55,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958755893] [2022-03-03 20:21:55,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:21:55,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:21:55,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:21:55,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:21:55,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:21:55,740 INFO L87 Difference]: Start difference. First operand 5011 states and 18165 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:02,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:02,087 INFO L93 Difference]: Finished difference Result 9967 states and 34044 transitions. [2022-03-03 20:22:02,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-03-03 20:22:02,088 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:22:02,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:02,106 INFO L225 Difference]: With dead ends: 9967 [2022-03-03 20:22:02,106 INFO L226 Difference]: Without dead ends: 9952 [2022-03-03 20:22:02,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 42 SyntacticMatches, 15 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7109 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2176, Invalid=14854, Unknown=0, NotChecked=0, Total=17030 [2022-03-03 20:22:02,107 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 479 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 2532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1303 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:02,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 528 Invalid, 2532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1157 Invalid, 0 Unknown, 1303 Unchecked, 0.6s Time] [2022-03-03 20:22:02,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9952 states. [2022-03-03 20:22:02,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9952 to 5037. [2022-03-03 20:22:02,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5037 states, 5036 states have (on average 3.631254964257347) internal successors, (18287), 5036 states have internal predecessors, (18287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5037 states to 5037 states and 18287 transitions. [2022-03-03 20:22:02,243 INFO L78 Accepts]: Start accepts. Automaton has 5037 states and 18287 transitions. Word has length 26 [2022-03-03 20:22:02,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:02,243 INFO L470 AbstractCegarLoop]: Abstraction has 5037 states and 18287 transitions. [2022-03-03 20:22:02,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:02,243 INFO L276 IsEmpty]: Start isEmpty. Operand 5037 states and 18287 transitions. [2022-03-03 20:22:02,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:22:02,250 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:02,251 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:02,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-03-03 20:22:02,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-03-03 20:22:02,452 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:02,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:02,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1713979010, now seen corresponding path program 67 times [2022-03-03 20:22:02,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:02,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201937146] [2022-03-03 20:22:02,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:02,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:02,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:02,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201937146] [2022-03-03 20:22:02,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201937146] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:02,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773399543] [2022-03-03 20:22:02,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:22:02,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:02,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:02,605 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:02,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-03 20:22:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:02,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 20:22:02,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:02,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:22:02,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:22:02,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-03 20:22:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:02,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:03,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:22:03,097 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:22:03,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 20 treesize of output 55 [2022-03-03 20:22:03,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:22:03,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:22:03,272 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:22:03,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-03-03 20:22:03,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:03,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773399543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:03,513 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:03,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:22:03,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959624337] [2022-03-03 20:22:03,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:03,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:22:03,513 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:03,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:22:03,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:22:03,514 INFO L87 Difference]: Start difference. First operand 5037 states and 18287 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:05,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:05,880 INFO L93 Difference]: Finished difference Result 8705 states and 29599 transitions. [2022-03-03 20:22:05,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 20:22:05,881 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:22:05,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:05,899 INFO L225 Difference]: With dead ends: 8705 [2022-03-03 20:22:05,899 INFO L226 Difference]: Without dead ends: 8645 [2022-03-03 20:22:05,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=585, Invalid=2721, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 20:22:05,900 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 275 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 450 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:05,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 458 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1560 Invalid, 0 Unknown, 450 Unchecked, 0.7s Time] [2022-03-03 20:22:05,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8645 states. [2022-03-03 20:22:05,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8645 to 5078. [2022-03-03 20:22:05,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5078 states, 5077 states have (on average 3.629899546976561) internal successors, (18429), 5077 states have internal predecessors, (18429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5078 states to 5078 states and 18429 transitions. [2022-03-03 20:22:05,999 INFO L78 Accepts]: Start accepts. Automaton has 5078 states and 18429 transitions. Word has length 26 [2022-03-03 20:22:05,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:05,999 INFO L470 AbstractCegarLoop]: Abstraction has 5078 states and 18429 transitions. [2022-03-03 20:22:05,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:05,999 INFO L276 IsEmpty]: Start isEmpty. Operand 5078 states and 18429 transitions. [2022-03-03 20:22:06,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:22:06,007 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:06,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:06,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-03 20:22:06,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:06,209 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:06,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:06,209 INFO L85 PathProgramCache]: Analyzing trace with hash -756469736, now seen corresponding path program 60 times [2022-03-03 20:22:06,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:06,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507302043] [2022-03-03 20:22:06,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:06,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:06,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:06,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507302043] [2022-03-03 20:22:06,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507302043] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:06,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734211065] [2022-03-03 20:22:06,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:22:06,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:06,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:06,407 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:06,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-03 20:22:06,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:22:06,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:22:06,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:22:06,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:06,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:22:06,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:22:06,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:22:06,703 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:22:06,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 48 [2022-03-03 20:22:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:06,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:06,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:22:06,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:22:06,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:22:06,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:22:06,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-03-03 20:22:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:07,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734211065] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:07,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:07,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 20:22:07,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717649731] [2022-03-03 20:22:07,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:07,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 20:22:07,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:07,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 20:22:07,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-03-03 20:22:07,017 INFO L87 Difference]: Start difference. First operand 5078 states and 18429 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:07,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:07,777 INFO L93 Difference]: Finished difference Result 5510 states and 19667 transitions. [2022-03-03 20:22:07,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 20:22:07,778 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:22:07,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:07,787 INFO L225 Difference]: With dead ends: 5510 [2022-03-03 20:22:07,787 INFO L226 Difference]: Without dead ends: 5480 [2022-03-03 20:22:07,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=460, Invalid=2402, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 20:22:07,788 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 151 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:07,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 312 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 307 Invalid, 0 Unknown, 236 Unchecked, 0.2s Time] [2022-03-03 20:22:07,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5480 states. [2022-03-03 20:22:07,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5480 to 5104. [2022-03-03 20:22:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5104 states, 5103 states have (on average 3.6304134822653342) internal successors, (18526), 5103 states have internal predecessors, (18526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:07,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5104 states to 5104 states and 18526 transitions. [2022-03-03 20:22:07,859 INFO L78 Accepts]: Start accepts. Automaton has 5104 states and 18526 transitions. Word has length 26 [2022-03-03 20:22:07,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:07,860 INFO L470 AbstractCegarLoop]: Abstraction has 5104 states and 18526 transitions. [2022-03-03 20:22:07,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:07,860 INFO L276 IsEmpty]: Start isEmpty. Operand 5104 states and 18526 transitions. [2022-03-03 20:22:07,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:22:07,867 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:07,867 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:07,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-03-03 20:22:08,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:08,069 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:08,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:08,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1678171876, now seen corresponding path program 61 times [2022-03-03 20:22:08,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:08,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235107421] [2022-03-03 20:22:08,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:08,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:08,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:08,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235107421] [2022-03-03 20:22:08,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235107421] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:08,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420120326] [2022-03-03 20:22:08,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:22:08,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:08,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:08,267 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:08,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-03 20:22:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:08,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 20:22:08,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:08,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:22:08,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:22:08,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:22:08,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:22:08,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2022-03-03 20:22:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:08,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:08,720 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:22:08,720 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 22 treesize of output 47 [2022-03-03 20:22:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:09,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420120326] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:09,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:09,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-03-03 20:22:09,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451873197] [2022-03-03 20:22:09,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:09,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:22:09,025 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:09,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:22:09,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:22:09,026 INFO L87 Difference]: Start difference. First operand 5104 states and 18526 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:10,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:10,171 INFO L93 Difference]: Finished difference Result 6841 states and 24155 transitions. [2022-03-03 20:22:10,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 20:22:10,171 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:22:10,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:10,185 INFO L225 Difference]: With dead ends: 6841 [2022-03-03 20:22:10,185 INFO L226 Difference]: Without dead ends: 6811 [2022-03-03 20:22:10,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=389, Invalid=2367, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 20:22:10,185 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 144 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:10,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 441 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 982 Invalid, 0 Unknown, 218 Unchecked, 0.4s Time] [2022-03-03 20:22:10,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6811 states. [2022-03-03 20:22:10,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6811 to 5092. [2022-03-03 20:22:10,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5092 states, 5091 states have (on average 3.6311137301119625) internal successors, (18486), 5091 states have internal predecessors, (18486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5092 states to 5092 states and 18486 transitions. [2022-03-03 20:22:10,286 INFO L78 Accepts]: Start accepts. Automaton has 5092 states and 18486 transitions. Word has length 26 [2022-03-03 20:22:10,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:10,286 INFO L470 AbstractCegarLoop]: Abstraction has 5092 states and 18486 transitions. [2022-03-03 20:22:10,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:10,287 INFO L276 IsEmpty]: Start isEmpty. Operand 5092 states and 18486 transitions. [2022-03-03 20:22:10,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:22:10,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:10,294 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:10,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-03-03 20:22:10,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-03 20:22:10,495 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:10,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:10,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1326090780, now seen corresponding path program 62 times [2022-03-03 20:22:10,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:10,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420186517] [2022-03-03 20:22:10,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:10,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:10,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:10,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420186517] [2022-03-03 20:22:10,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420186517] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:10,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093903454] [2022-03-03 20:22:10,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:22:10,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:10,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:10,655 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:10,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-03 20:22:10,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:22:10,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:22:10,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:22:10,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:10,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:22:10,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:22:10,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:22:10,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 20:22:10,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-03-03 20:22:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:10,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:11,111 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 20:22:11,111 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 22 treesize of output 47 [2022-03-03 20:22:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:11,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093903454] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:11,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:11,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-03-03 20:22:11,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478230502] [2022-03-03 20:22:11,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:11,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:22:11,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:11,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:22:11,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:22:11,484 INFO L87 Difference]: Start difference. First operand 5092 states and 18486 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:13,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:13,753 INFO L93 Difference]: Finished difference Result 7334 states and 25843 transitions. [2022-03-03 20:22:13,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 20:22:13,753 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:22:13,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:13,767 INFO L225 Difference]: With dead ends: 7334 [2022-03-03 20:22:13,767 INFO L226 Difference]: Without dead ends: 7319 [2022-03-03 20:22:13,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=650, Invalid=3010, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 20:22:13,768 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 221 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 392 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:13,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 389 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1144 Invalid, 0 Unknown, 392 Unchecked, 0.6s Time] [2022-03-03 20:22:13,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7319 states. [2022-03-03 20:22:13,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7319 to 5037. [2022-03-03 20:22:13,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5037 states, 5036 states have (on average 3.6280778395552025) internal successors, (18271), 5036 states have internal predecessors, (18271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:13,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5037 states to 5037 states and 18271 transitions. [2022-03-03 20:22:13,849 INFO L78 Accepts]: Start accepts. Automaton has 5037 states and 18271 transitions. Word has length 26 [2022-03-03 20:22:13,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:13,849 INFO L470 AbstractCegarLoop]: Abstraction has 5037 states and 18271 transitions. [2022-03-03 20:22:13,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:13,849 INFO L276 IsEmpty]: Start isEmpty. Operand 5037 states and 18271 transitions. [2022-03-03 20:22:13,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 20:22:13,856 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:13,856 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:13,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-03-03 20:22:14,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable130 [2022-03-03 20:22:14,056 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:14,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:14,056 INFO L85 PathProgramCache]: Analyzing trace with hash 856703750, now seen corresponding path program 68 times [2022-03-03 20:22:14,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:14,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723742908] [2022-03-03 20:22:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:14,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:14,209 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:14,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723742908] [2022-03-03 20:22:14,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723742908] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:14,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183872507] [2022-03-03 20:22:14,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:22:14,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:14,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:14,210 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:14,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-03 20:22:14,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:22:14,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:22:14,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 20:22:14,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:14,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 20:22:14,493 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:22:14,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 32 [2022-03-03 20:22:14,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:14,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:14,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 20:22:14,853 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 37 treesize of output 70 [2022-03-03 20:22:15,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:15,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183872507] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:15,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:15,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 20:22:15,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683236443] [2022-03-03 20:22:15,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:15,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 20:22:15,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:15,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 20:22:15,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:22:15,673 INFO L87 Difference]: Start difference. First operand 5037 states and 18271 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:19,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:19,056 INFO L93 Difference]: Finished difference Result 11364 states and 38156 transitions. [2022-03-03 20:22:19,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-03 20:22:19,056 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 20:22:19,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:19,078 INFO L225 Difference]: With dead ends: 11364 [2022-03-03 20:22:19,078 INFO L226 Difference]: Without dead ends: 11271 [2022-03-03 20:22:19,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1888 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=835, Invalid=4715, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 20:22:19,078 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 266 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 528 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:19,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 434 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 711 Invalid, 0 Unknown, 528 Unchecked, 0.4s Time] [2022-03-03 20:22:19,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11271 states. [2022-03-03 20:22:19,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11271 to 5009. [2022-03-03 20:22:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5009 states, 5008 states have (on average 3.626597444089457) internal successors, (18162), 5008 states have internal predecessors, (18162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:19,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5009 states to 5009 states and 18162 transitions. [2022-03-03 20:22:19,190 INFO L78 Accepts]: Start accepts. Automaton has 5009 states and 18162 transitions. Word has length 26 [2022-03-03 20:22:19,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:19,190 INFO L470 AbstractCegarLoop]: Abstraction has 5009 states and 18162 transitions. [2022-03-03 20:22:19,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:19,190 INFO L276 IsEmpty]: Start isEmpty. Operand 5009 states and 18162 transitions. [2022-03-03 20:22:19,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:22:19,197 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:19,197 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:19,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-03-03 20:22:19,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:19,418 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:19,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:19,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1754023866, now seen corresponding path program 69 times [2022-03-03 20:22:19,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:19,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516802570] [2022-03-03 20:22:19,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:19,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:19,469 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:19,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516802570] [2022-03-03 20:22:19,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516802570] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:19,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036063516] [2022-03-03 20:22:19,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:22:19,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:19,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:19,471 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:19,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-03 20:22:19,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:22:19,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:22:19,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:22:19,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:19,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:19,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036063516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:19,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:19,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 20:22:19,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913237244] [2022-03-03 20:22:19,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:19,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 20:22:19,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:19,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 20:22:19,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-03-03 20:22:19,727 INFO L87 Difference]: Start difference. First operand 5009 states and 18162 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:22,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:22,487 INFO L93 Difference]: Finished difference Result 12590 states and 40846 transitions. [2022-03-03 20:22:22,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-03-03 20:22:22,487 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:22:22,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:22,513 INFO L225 Difference]: With dead ends: 12590 [2022-03-03 20:22:22,513 INFO L226 Difference]: Without dead ends: 12590 [2022-03-03 20:22:22,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11198 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4782, Invalid=21300, Unknown=0, NotChecked=0, Total=26082 [2022-03-03 20:22:22,516 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 718 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:22,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 673 Invalid, 1948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1818 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:22:22,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12590 states. [2022-03-03 20:22:22,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12590 to 5439. [2022-03-03 20:22:22,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5439 states, 5438 states have (on average 3.690327326222876) internal successors, (20068), 5438 states have internal predecessors, (20068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:22,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5439 states to 5439 states and 20068 transitions. [2022-03-03 20:22:22,701 INFO L78 Accepts]: Start accepts. Automaton has 5439 states and 20068 transitions. Word has length 28 [2022-03-03 20:22:22,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:22,701 INFO L470 AbstractCegarLoop]: Abstraction has 5439 states and 20068 transitions. [2022-03-03 20:22:22,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:22,701 INFO L276 IsEmpty]: Start isEmpty. Operand 5439 states and 20068 transitions. [2022-03-03 20:22:22,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:22:22,708 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:22,708 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:22,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-03-03 20:22:22,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:22,909 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:22,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:22,909 INFO L85 PathProgramCache]: Analyzing trace with hash 777705022, now seen corresponding path program 70 times [2022-03-03 20:22:22,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:22,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224911909] [2022-03-03 20:22:22,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:22,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:22,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:22,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224911909] [2022-03-03 20:22:22,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224911909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:22,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816934572] [2022-03-03 20:22:22,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:22:22,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:22,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:22,967 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:22,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-03 20:22:22,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:22:22,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:22:22,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:22:22,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:23,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:23,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816934572] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:23,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:23,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 20:22:23,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261874341] [2022-03-03 20:22:23,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:23,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:22:23,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:23,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:22:23,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:22:23,311 INFO L87 Difference]: Start difference. First operand 5439 states and 20068 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:28,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:28,992 INFO L93 Difference]: Finished difference Result 16901 states and 54084 transitions. [2022-03-03 20:22:28,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 263 states. [2022-03-03 20:22:28,993 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:22:28,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:29,024 INFO L225 Difference]: With dead ends: 16901 [2022-03-03 20:22:29,024 INFO L226 Difference]: Without dead ends: 16901 [2022-03-03 20:22:29,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33756 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=12551, Invalid=62251, Unknown=0, NotChecked=0, Total=74802 [2022-03-03 20:22:29,027 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 965 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 2617 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 2822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 2617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:29,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [965 Valid, 886 Invalid, 2822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 2617 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 20:22:29,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16901 states. [2022-03-03 20:22:29,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16901 to 5488. [2022-03-03 20:22:29,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5488 states, 5487 states have (on average 3.7020229633679604) internal successors, (20313), 5487 states have internal predecessors, (20313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:29,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5488 states to 5488 states and 20313 transitions. [2022-03-03 20:22:29,190 INFO L78 Accepts]: Start accepts. Automaton has 5488 states and 20313 transitions. Word has length 28 [2022-03-03 20:22:29,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:29,190 INFO L470 AbstractCegarLoop]: Abstraction has 5488 states and 20313 transitions. [2022-03-03 20:22:29,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:29,190 INFO L276 IsEmpty]: Start isEmpty. Operand 5488 states and 20313 transitions. [2022-03-03 20:22:29,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:22:29,198 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:29,198 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:29,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-03 20:22:29,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-03 20:22:29,398 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:29,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:29,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1344657102, now seen corresponding path program 71 times [2022-03-03 20:22:29,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:29,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319962875] [2022-03-03 20:22:29,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:29,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:29,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:29,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319962875] [2022-03-03 20:22:29,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319962875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:29,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867997316] [2022-03-03 20:22:29,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:22:29,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:29,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:29,447 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:29,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-03 20:22:29,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 20:22:29,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:22:29,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:22:29,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:29,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:29,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867997316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:29,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:29,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 20:22:29,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101394304] [2022-03-03 20:22:29,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:29,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 20:22:29,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:29,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 20:22:29,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-03-03 20:22:29,722 INFO L87 Difference]: Start difference. First operand 5488 states and 20313 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:33,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:33,415 INFO L93 Difference]: Finished difference Result 15449 states and 49832 transitions. [2022-03-03 20:22:33,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-03-03 20:22:33,415 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:22:33,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:33,444 INFO L225 Difference]: With dead ends: 15449 [2022-03-03 20:22:33,444 INFO L226 Difference]: Without dead ends: 15449 [2022-03-03 20:22:33,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16369 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6947, Invalid=30495, Unknown=0, NotChecked=0, Total=37442 [2022-03-03 20:22:33,446 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 862 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 2318 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:33,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 817 Invalid, 2482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2318 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 20:22:33,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15449 states. [2022-03-03 20:22:33,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15449 to 5354. [2022-03-03 20:22:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5354 states, 5353 states have (on average 3.6775639828133757) internal successors, (19686), 5353 states have internal predecessors, (19686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:33,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5354 states to 5354 states and 19686 transitions. [2022-03-03 20:22:33,593 INFO L78 Accepts]: Start accepts. Automaton has 5354 states and 19686 transitions. Word has length 28 [2022-03-03 20:22:33,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:33,593 INFO L470 AbstractCegarLoop]: Abstraction has 5354 states and 19686 transitions. [2022-03-03 20:22:33,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:33,593 INFO L276 IsEmpty]: Start isEmpty. Operand 5354 states and 19686 transitions. [2022-03-03 20:22:33,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:22:33,601 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:33,601 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:33,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-03-03 20:22:33,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-03 20:22:33,801 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:33,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:33,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1768281872, now seen corresponding path program 72 times [2022-03-03 20:22:33,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:33,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388425395] [2022-03-03 20:22:33,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:33,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:33,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:33,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388425395] [2022-03-03 20:22:33,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388425395] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:33,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921129086] [2022-03-03 20:22:33,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:22:33,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:33,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:33,846 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:33,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-03 20:22:33,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:22:33,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:22:33,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:22:33,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:33,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:34,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921129086] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:34,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:34,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 20:22:34,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747846726] [2022-03-03 20:22:34,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:34,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 20:22:34,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:34,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 20:22:34,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-03-03 20:22:34,099 INFO L87 Difference]: Start difference. First operand 5354 states and 19686 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:36,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:36,851 INFO L93 Difference]: Finished difference Result 12555 states and 40750 transitions. [2022-03-03 20:22:36,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-03-03 20:22:36,851 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:22:36,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:36,876 INFO L225 Difference]: With dead ends: 12555 [2022-03-03 20:22:36,876 INFO L226 Difference]: Without dead ends: 12555 [2022-03-03 20:22:36,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10124 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4362, Invalid=20444, Unknown=0, NotChecked=0, Total=24806 [2022-03-03 20:22:36,879 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 648 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 2006 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 2148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:36,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 694 Invalid, 2148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2006 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 20:22:36,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12555 states. [2022-03-03 20:22:37,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12555 to 5328. [2022-03-03 20:22:37,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5328 states, 5327 states have (on average 3.672423502909705) internal successors, (19563), 5327 states have internal predecessors, (19563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:37,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5328 states to 5328 states and 19563 transitions. [2022-03-03 20:22:37,054 INFO L78 Accepts]: Start accepts. Automaton has 5328 states and 19563 transitions. Word has length 28 [2022-03-03 20:22:37,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:37,054 INFO L470 AbstractCegarLoop]: Abstraction has 5328 states and 19563 transitions. [2022-03-03 20:22:37,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:37,054 INFO L276 IsEmpty]: Start isEmpty. Operand 5328 states and 19563 transitions. [2022-03-03 20:22:37,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:22:37,062 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:37,062 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:37,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-03-03 20:22:37,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-03 20:22:37,263 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:37,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:37,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1317055158, now seen corresponding path program 63 times [2022-03-03 20:22:37,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:37,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467536177] [2022-03-03 20:22:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:37,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:37,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:37,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467536177] [2022-03-03 20:22:37,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467536177] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:37,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762969236] [2022-03-03 20:22:37,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:22:37,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:37,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:37,308 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:37,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-03 20:22:37,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:22:37,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:22:37,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:22:37,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:37,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:37,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762969236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:37,532 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:37,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-03 20:22:37,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474152710] [2022-03-03 20:22:37,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:37,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 20:22:37,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:37,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 20:22:37,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-03-03 20:22:37,533 INFO L87 Difference]: Start difference. First operand 5328 states and 19563 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:38,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:38,968 INFO L93 Difference]: Finished difference Result 11126 states and 36778 transitions. [2022-03-03 20:22:38,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-03 20:22:38,968 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:22:38,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:38,989 INFO L225 Difference]: With dead ends: 11126 [2022-03-03 20:22:38,990 INFO L226 Difference]: Without dead ends: 11126 [2022-03-03 20:22:38,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2962 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1577, Invalid=6795, Unknown=0, NotChecked=0, Total=8372 [2022-03-03 20:22:38,991 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 490 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:38,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 517 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1366 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:22:38,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11126 states. [2022-03-03 20:22:39,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11126 to 5378. [2022-03-03 20:22:39,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5378 states, 5377 states have (on average 3.6656127952389808) internal successors, (19710), 5377 states have internal predecessors, (19710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:39,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5378 states to 5378 states and 19710 transitions. [2022-03-03 20:22:39,154 INFO L78 Accepts]: Start accepts. Automaton has 5378 states and 19710 transitions. Word has length 28 [2022-03-03 20:22:39,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:39,154 INFO L470 AbstractCegarLoop]: Abstraction has 5378 states and 19710 transitions. [2022-03-03 20:22:39,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:39,154 INFO L276 IsEmpty]: Start isEmpty. Operand 5378 states and 19710 transitions. [2022-03-03 20:22:39,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:22:39,162 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:39,162 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:39,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-03-03 20:22:39,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-03 20:22:39,363 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:39,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:39,363 INFO L85 PathProgramCache]: Analyzing trace with hash 738717818, now seen corresponding path program 73 times [2022-03-03 20:22:39,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:39,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848280070] [2022-03-03 20:22:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:39,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:39,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:39,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848280070] [2022-03-03 20:22:39,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848280070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:39,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896411895] [2022-03-03 20:22:39,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:22:39,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:39,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:39,403 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:39,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-03 20:22:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:39,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 20:22:39,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:39,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:39,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896411895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:39,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:39,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-03 20:22:39,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748592325] [2022-03-03 20:22:39,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:39,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 20:22:39,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:39,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 20:22:39,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-03-03 20:22:39,623 INFO L87 Difference]: Start difference. First operand 5378 states and 19710 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:41,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:41,255 INFO L93 Difference]: Finished difference Result 12267 states and 41359 transitions. [2022-03-03 20:22:41,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-03 20:22:41,255 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:22:41,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:41,280 INFO L225 Difference]: With dead ends: 12267 [2022-03-03 20:22:41,280 INFO L226 Difference]: Without dead ends: 12203 [2022-03-03 20:22:41,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4599 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2755, Invalid=8801, Unknown=0, NotChecked=0, Total=11556 [2022-03-03 20:22:41,282 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 660 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:41,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 270 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:22:41,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12203 states. [2022-03-03 20:22:41,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12203 to 6423. [2022-03-03 20:22:41,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6423 states, 6422 states have (on average 3.7877608221737775) internal successors, (24325), 6422 states have internal predecessors, (24325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6423 states to 6423 states and 24325 transitions. [2022-03-03 20:22:41,492 INFO L78 Accepts]: Start accepts. Automaton has 6423 states and 24325 transitions. Word has length 28 [2022-03-03 20:22:41,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:41,492 INFO L470 AbstractCegarLoop]: Abstraction has 6423 states and 24325 transitions. [2022-03-03 20:22:41,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:41,492 INFO L276 IsEmpty]: Start isEmpty. Operand 6423 states and 24325 transitions. [2022-03-03 20:22:41,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:22:41,502 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:41,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:41,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-03-03 20:22:41,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:41,702 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:41,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:41,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1738509770, now seen corresponding path program 74 times [2022-03-03 20:22:41,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:41,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662278042] [2022-03-03 20:22:41,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:41,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:41,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:41,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662278042] [2022-03-03 20:22:41,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662278042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:41,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643295935] [2022-03-03 20:22:41,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:22:41,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:41,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:41,734 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:41,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-03 20:22:41,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:22:41,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:22:41,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:22:41,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:41,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:41,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643295935] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:41,909 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:41,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-03 20:22:41,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52676565] [2022-03-03 20:22:41,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:41,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:22:41,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:41,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:22:41,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:22:41,909 INFO L87 Difference]: Start difference. First operand 6423 states and 24325 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:42,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:42,145 INFO L93 Difference]: Finished difference Result 8764 states and 31163 transitions. [2022-03-03 20:22:42,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 20:22:42,145 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:22:42,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:42,162 INFO L225 Difference]: With dead ends: 8764 [2022-03-03 20:22:42,162 INFO L226 Difference]: Without dead ends: 8669 [2022-03-03 20:22:42,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:22:42,163 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 205 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:42,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 75 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:22:42,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8669 states. [2022-03-03 20:22:42,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8669 to 6429. [2022-03-03 20:22:42,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6429 states, 6428 states have (on average 3.7762912258867454) internal successors, (24274), 6428 states have internal predecessors, (24274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:42,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6429 states to 6429 states and 24274 transitions. [2022-03-03 20:22:42,282 INFO L78 Accepts]: Start accepts. Automaton has 6429 states and 24274 transitions. Word has length 28 [2022-03-03 20:22:42,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:42,282 INFO L470 AbstractCegarLoop]: Abstraction has 6429 states and 24274 transitions. [2022-03-03 20:22:42,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:42,282 INFO L276 IsEmpty]: Start isEmpty. Operand 6429 states and 24274 transitions. [2022-03-03 20:22:42,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:22:42,292 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:42,292 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:42,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-03-03 20:22:42,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-03-03 20:22:42,493 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:42,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:42,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1718584438, now seen corresponding path program 64 times [2022-03-03 20:22:42,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:42,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505644480] [2022-03-03 20:22:42,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:42,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:42,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:42,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505644480] [2022-03-03 20:22:42,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505644480] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:42,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300532992] [2022-03-03 20:22:42,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:22:42,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:42,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:42,537 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:42,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-03 20:22:42,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:22:42,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:22:42,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:22:42,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:42,674 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:42,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:42,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300532992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:42,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:42,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-03 20:22:42,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571988258] [2022-03-03 20:22:42,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:42,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 20:22:42,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:42,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 20:22:42,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-03-03 20:22:42,731 INFO L87 Difference]: Start difference. First operand 6429 states and 24274 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-03-03 20:22:43,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:43,353 INFO L93 Difference]: Finished difference Result 10862 states and 39021 transitions. [2022-03-03 20:22:43,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 20:22:43,353 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 28 [2022-03-03 20:22:43,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:43,376 INFO L225 Difference]: With dead ends: 10862 [2022-03-03 20:22:43,376 INFO L226 Difference]: Without dead ends: 10728 [2022-03-03 20:22:43,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 20:22:43,376 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 376 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:43,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 210 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:22:43,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10728 states. [2022-03-03 20:22:43,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10728 to 7624. [2022-03-03 20:22:43,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7624 states, 7623 states have (on average 3.8049324412960774) internal successors, (29005), 7623 states have internal predecessors, (29005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:43,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7624 states to 7624 states and 29005 transitions. [2022-03-03 20:22:43,560 INFO L78 Accepts]: Start accepts. Automaton has 7624 states and 29005 transitions. Word has length 28 [2022-03-03 20:22:43,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:43,560 INFO L470 AbstractCegarLoop]: Abstraction has 7624 states and 29005 transitions. [2022-03-03 20:22:43,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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) [2022-03-03 20:22:43,560 INFO L276 IsEmpty]: Start isEmpty. Operand 7624 states and 29005 transitions. [2022-03-03 20:22:43,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:22:43,572 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:43,572 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:43,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-03-03 20:22:43,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-03-03 20:22:43,773 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:43,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:43,773 INFO L85 PathProgramCache]: Analyzing trace with hash -2020160002, now seen corresponding path program 75 times [2022-03-03 20:22:43,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:43,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320401776] [2022-03-03 20:22:43,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:43,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:43,813 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:43,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320401776] [2022-03-03 20:22:43,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320401776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:43,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065005639] [2022-03-03 20:22:43,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:22:43,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:43,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:43,814 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:43,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-03 20:22:43,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:22:43,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:22:43,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 20:22:43,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:43,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:44,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065005639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:44,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:44,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-03 20:22:44,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681928371] [2022-03-03 20:22:44,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:44,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 20:22:44,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:44,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 20:22:44,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-03-03 20:22:44,048 INFO L87 Difference]: Start difference. First operand 7624 states and 29005 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:45,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:45,664 INFO L93 Difference]: Finished difference Result 13035 states and 44313 transitions. [2022-03-03 20:22:45,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-03 20:22:45,664 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:22:45,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:45,691 INFO L225 Difference]: With dead ends: 13035 [2022-03-03 20:22:45,691 INFO L226 Difference]: Without dead ends: 12994 [2022-03-03 20:22:45,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3972 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2636, Invalid=7870, Unknown=0, NotChecked=0, Total=10506 [2022-03-03 20:22:45,693 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 802 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:45,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 300 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:22:45,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12994 states. [2022-03-03 20:22:45,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12994 to 7678. [2022-03-03 20:22:45,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7678 states, 7677 states have (on average 3.8047414354565587) internal successors, (29209), 7677 states have internal predecessors, (29209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7678 states to 7678 states and 29209 transitions. [2022-03-03 20:22:45,916 INFO L78 Accepts]: Start accepts. Automaton has 7678 states and 29209 transitions. Word has length 28 [2022-03-03 20:22:45,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:45,917 INFO L470 AbstractCegarLoop]: Abstraction has 7678 states and 29209 transitions. [2022-03-03 20:22:45,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:45,917 INFO L276 IsEmpty]: Start isEmpty. Operand 7678 states and 29209 transitions. [2022-03-03 20:22:45,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:22:45,929 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:45,929 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:45,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-03-03 20:22:46,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:46,129 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:46,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:46,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1347747220, now seen corresponding path program 76 times [2022-03-03 20:22:46,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:46,130 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971295575] [2022-03-03 20:22:46,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:46,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:46,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:46,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971295575] [2022-03-03 20:22:46,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971295575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:46,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844837368] [2022-03-03 20:22:46,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:22:46,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:46,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:46,167 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:46,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-03 20:22:46,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:22:46,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:22:46,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 20:22:46,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:46,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:46,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844837368] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:46,397 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:46,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-03 20:22:46,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163844695] [2022-03-03 20:22:46,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:46,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 20:22:46,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:46,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 20:22:46,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-03-03 20:22:46,398 INFO L87 Difference]: Start difference. First operand 7678 states and 29209 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:47,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:47,645 INFO L93 Difference]: Finished difference Result 11800 states and 40768 transitions. [2022-03-03 20:22:47,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-03 20:22:47,645 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:22:47,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:47,716 INFO L225 Difference]: With dead ends: 11800 [2022-03-03 20:22:47,716 INFO L226 Difference]: Without dead ends: 11751 [2022-03-03 20:22:47,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2669 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2030, Invalid=5110, Unknown=0, NotChecked=0, Total=7140 [2022-03-03 20:22:47,717 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 536 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:47,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 245 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:22:47,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11751 states. [2022-03-03 20:22:47,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11751 to 7653. [2022-03-03 20:22:47,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7653 states, 7652 states have (on average 3.8080240460010453) internal successors, (29139), 7652 states have internal predecessors, (29139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:47,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7653 states to 7653 states and 29139 transitions. [2022-03-03 20:22:47,918 INFO L78 Accepts]: Start accepts. Automaton has 7653 states and 29139 transitions. Word has length 28 [2022-03-03 20:22:47,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:47,918 INFO L470 AbstractCegarLoop]: Abstraction has 7653 states and 29139 transitions. [2022-03-03 20:22:47,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:47,919 INFO L276 IsEmpty]: Start isEmpty. Operand 7653 states and 29139 transitions. [2022-03-03 20:22:47,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:22:47,930 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:47,930 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:47,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-03-03 20:22:48,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:48,131 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:48,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:48,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1898421154, now seen corresponding path program 77 times [2022-03-03 20:22:48,131 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:48,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985282619] [2022-03-03 20:22:48,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:48,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:48,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:48,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985282619] [2022-03-03 20:22:48,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985282619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:48,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236604379] [2022-03-03 20:22:48,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:22:48,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:48,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:48,176 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:48,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-03 20:22:48,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:22:48,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:22:48,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 20:22:48,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:48,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:48,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236604379] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:48,358 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:48,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-03 20:22:48,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292214152] [2022-03-03 20:22:48,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:48,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:22:48,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:48,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:22:48,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:22:48,359 INFO L87 Difference]: Start difference. First operand 7653 states and 29139 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:49,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:49,644 INFO L93 Difference]: Finished difference Result 17070 states and 57452 transitions. [2022-03-03 20:22:49,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-03 20:22:49,644 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:22:49,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:49,680 INFO L225 Difference]: With dead ends: 17070 [2022-03-03 20:22:49,681 INFO L226 Difference]: Without dead ends: 16937 [2022-03-03 20:22:49,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2824 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1663, Invalid=5647, Unknown=0, NotChecked=0, Total=7310 [2022-03-03 20:22:49,682 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 555 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:49,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 240 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:22:49,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16937 states. [2022-03-03 20:22:49,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16937 to 7913. [2022-03-03 20:22:49,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7913 states, 7912 states have (on average 3.8351870576339735) internal successors, (30344), 7912 states have internal predecessors, (30344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:49,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7913 states to 7913 states and 30344 transitions. [2022-03-03 20:22:49,962 INFO L78 Accepts]: Start accepts. Automaton has 7913 states and 30344 transitions. Word has length 28 [2022-03-03 20:22:49,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:49,962 INFO L470 AbstractCegarLoop]: Abstraction has 7913 states and 30344 transitions. [2022-03-03 20:22:49,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:49,962 INFO L276 IsEmpty]: Start isEmpty. Operand 7913 states and 30344 transitions. [2022-03-03 20:22:49,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:22:49,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:49,975 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:49,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-03-03 20:22:50,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:50,175 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:50,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:50,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1701976484, now seen corresponding path program 78 times [2022-03-03 20:22:50,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:50,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841170109] [2022-03-03 20:22:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:50,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:22:50,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:50,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841170109] [2022-03-03 20:22:50,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841170109] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:50,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375892701] [2022-03-03 20:22:50,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:22:50,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:50,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:50,204 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:50,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-03 20:22:50,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:22:50,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:22:50,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:22:50,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:22:50,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:22:50,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375892701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:50,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:50,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2022-03-03 20:22:50,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435754339] [2022-03-03 20:22:50,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:50,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:22:50,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:50,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:22:50,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:22:50,392 INFO L87 Difference]: Start difference. First operand 7913 states and 30344 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:50,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:50,821 INFO L93 Difference]: Finished difference Result 13951 states and 48563 transitions. [2022-03-03 20:22:50,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 20:22:50,821 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:22:50,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:50,852 INFO L225 Difference]: With dead ends: 13951 [2022-03-03 20:22:50,853 INFO L226 Difference]: Without dead ends: 13951 [2022-03-03 20:22:50,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=464, Invalid=868, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 20:22:50,853 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 389 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:50,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 95 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:22:50,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13951 states. [2022-03-03 20:22:51,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13951 to 7621. [2022-03-03 20:22:51,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7621 states, 7620 states have (on average 3.812729658792651) internal successors, (29053), 7620 states have internal predecessors, (29053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:51,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7621 states to 7621 states and 29053 transitions. [2022-03-03 20:22:51,032 INFO L78 Accepts]: Start accepts. Automaton has 7621 states and 29053 transitions. Word has length 28 [2022-03-03 20:22:51,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:51,032 INFO L470 AbstractCegarLoop]: Abstraction has 7621 states and 29053 transitions. [2022-03-03 20:22:51,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:51,032 INFO L276 IsEmpty]: Start isEmpty. Operand 7621 states and 29053 transitions. [2022-03-03 20:22:51,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:22:51,044 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:51,044 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:51,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-03-03 20:22:51,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-03-03 20:22:51,244 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:51,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:51,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1659448956, now seen corresponding path program 79 times [2022-03-03 20:22:51,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:51,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528263886] [2022-03-03 20:22:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:51,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:51,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:51,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:51,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528263886] [2022-03-03 20:22:51,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528263886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:51,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285379238] [2022-03-03 20:22:51,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:22:51,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:51,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:51,284 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:51,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-03 20:22:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:51,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:22:51,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:51,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:51,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:51,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:51,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285379238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:51,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:51,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 17 [2022-03-03 20:22:51,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616863102] [2022-03-03 20:22:51,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:51,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:22:51,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:51,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:22:51,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:22:51,488 INFO L87 Difference]: Start difference. First operand 7621 states and 29053 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:52,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:52,799 INFO L93 Difference]: Finished difference Result 16836 states and 57663 transitions. [2022-03-03 20:22:52,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-03 20:22:52,800 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:22:52,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:52,836 INFO L225 Difference]: With dead ends: 16836 [2022-03-03 20:22:52,836 INFO L226 Difference]: Without dead ends: 16836 [2022-03-03 20:22:52,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3066 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1779, Invalid=6231, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 20:22:52,837 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 450 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:52,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 373 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:22:52,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16836 states. [2022-03-03 20:22:53,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16836 to 7737. [2022-03-03 20:22:53,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7737 states, 7736 states have (on average 3.8187693898655635) internal successors, (29542), 7736 states have internal predecessors, (29542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:53,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7737 states to 7737 states and 29542 transitions. [2022-03-03 20:22:53,062 INFO L78 Accepts]: Start accepts. Automaton has 7737 states and 29542 transitions. Word has length 28 [2022-03-03 20:22:53,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:53,062 INFO L470 AbstractCegarLoop]: Abstraction has 7737 states and 29542 transitions. [2022-03-03 20:22:53,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:53,062 INFO L276 IsEmpty]: Start isEmpty. Operand 7737 states and 29542 transitions. [2022-03-03 20:22:53,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:22:53,074 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:53,074 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:53,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-03-03 20:22:53,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-03-03 20:22:53,274 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:53,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:53,275 INFO L85 PathProgramCache]: Analyzing trace with hash -874534862, now seen corresponding path program 80 times [2022-03-03 20:22:53,275 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:53,275 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808133253] [2022-03-03 20:22:53,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:53,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:53,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:53,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808133253] [2022-03-03 20:22:53,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808133253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:53,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620735427] [2022-03-03 20:22:53,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:22:53,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:53,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:53,325 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:53,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-03 20:22:53,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:22:53,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:22:53,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:22:53,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:53,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:53,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620735427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:53,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:53,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 17 [2022-03-03 20:22:53,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417944097] [2022-03-03 20:22:53,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:53,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:22:53,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:53,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:22:53,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:22:53,542 INFO L87 Difference]: Start difference. First operand 7737 states and 29542 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:54,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:54,837 INFO L93 Difference]: Finished difference Result 16876 states and 58103 transitions. [2022-03-03 20:22:54,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-03 20:22:54,838 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:22:54,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:54,873 INFO L225 Difference]: With dead ends: 16876 [2022-03-03 20:22:54,873 INFO L226 Difference]: Without dead ends: 16876 [2022-03-03 20:22:54,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2780 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1581, Invalid=5901, Unknown=0, NotChecked=0, Total=7482 [2022-03-03 20:22:54,874 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 431 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:54,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 421 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:22:54,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16876 states. [2022-03-03 20:22:55,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16876 to 7869. [2022-03-03 20:22:55,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7869 states, 7868 states have (on average 3.8093543467208946) internal successors, (29972), 7868 states have internal predecessors, (29972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7869 states to 7869 states and 29972 transitions. [2022-03-03 20:22:55,108 INFO L78 Accepts]: Start accepts. Automaton has 7869 states and 29972 transitions. Word has length 28 [2022-03-03 20:22:55,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:55,108 INFO L470 AbstractCegarLoop]: Abstraction has 7869 states and 29972 transitions. [2022-03-03 20:22:55,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:55,108 INFO L276 IsEmpty]: Start isEmpty. Operand 7869 states and 29972 transitions. [2022-03-03 20:22:55,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:22:55,121 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:55,121 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:55,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-03-03 20:22:55,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-03-03 20:22:55,321 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:55,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:55,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1957557518, now seen corresponding path program 81 times [2022-03-03 20:22:55,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:55,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656566655] [2022-03-03 20:22:55,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:55,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:55,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:55,357 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:55,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656566655] [2022-03-03 20:22:55,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656566655] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:55,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652181626] [2022-03-03 20:22:55,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:22:55,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:55,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:55,359 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:55,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-03 20:22:55,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:22:55,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:22:55,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 20:22:55,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:55,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:55,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:55,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652181626] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:55,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:55,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-03 20:22:55,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166002925] [2022-03-03 20:22:55,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:55,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:22:55,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:55,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:22:55,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:22:55,541 INFO L87 Difference]: Start difference. First operand 7869 states and 29972 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:56,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:56,843 INFO L93 Difference]: Finished difference Result 19414 states and 65266 transitions. [2022-03-03 20:22:56,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-03 20:22:56,843 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:22:56,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:56,949 INFO L225 Difference]: With dead ends: 19414 [2022-03-03 20:22:56,949 INFO L226 Difference]: Without dead ends: 19369 [2022-03-03 20:22:56,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3061 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1800, Invalid=5856, Unknown=0, NotChecked=0, Total=7656 [2022-03-03 20:22:56,950 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 631 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:56,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 246 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:22:56,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19369 states. [2022-03-03 20:22:57,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19369 to 9274. [2022-03-03 20:22:57,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9274 states, 9273 states have (on average 3.850749487760164) internal successors, (35708), 9273 states have internal predecessors, (35708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9274 states to 9274 states and 35708 transitions. [2022-03-03 20:22:57,215 INFO L78 Accepts]: Start accepts. Automaton has 9274 states and 35708 transitions. Word has length 28 [2022-03-03 20:22:57,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:57,215 INFO L470 AbstractCegarLoop]: Abstraction has 9274 states and 35708 transitions. [2022-03-03 20:22:57,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:57,215 INFO L276 IsEmpty]: Start isEmpty. Operand 9274 states and 35708 transitions. [2022-03-03 20:22:57,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:22:57,230 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:57,230 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:57,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-03-03 20:22:57,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:57,430 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:57,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:57,431 INFO L85 PathProgramCache]: Analyzing trace with hash -486479400, now seen corresponding path program 82 times [2022-03-03 20:22:57,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:57,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772782217] [2022-03-03 20:22:57,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:57,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:57,466 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:57,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772782217] [2022-03-03 20:22:57,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772782217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:57,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372515787] [2022-03-03 20:22:57,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:22:57,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:57,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:57,467 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:57,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-03 20:22:57,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:22:57,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:22:57,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 20:22:57,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:57,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:57,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372515787] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:57,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:57,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-03 20:22:57,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442763289] [2022-03-03 20:22:57,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:57,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:22:57,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:57,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:22:57,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:22:57,650 INFO L87 Difference]: Start difference. First operand 9274 states and 35708 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:58,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:22:58,941 INFO L93 Difference]: Finished difference Result 19985 states and 66983 transitions. [2022-03-03 20:22:58,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-03 20:22:58,942 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:22:58,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:22:59,047 INFO L225 Difference]: With dead ends: 19985 [2022-03-03 20:22:59,047 INFO L226 Difference]: Without dead ends: 19985 [2022-03-03 20:22:59,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3005 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1800, Invalid=5856, Unknown=0, NotChecked=0, Total=7656 [2022-03-03 20:22:59,047 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 635 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:22:59,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [635 Valid, 285 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:22:59,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19985 states. [2022-03-03 20:22:59,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19985 to 9062. [2022-03-03 20:22:59,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9062 states, 9061 states have (on average 3.8345657212228232) internal successors, (34745), 9061 states have internal predecessors, (34745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:59,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9062 states to 9062 states and 34745 transitions. [2022-03-03 20:22:59,298 INFO L78 Accepts]: Start accepts. Automaton has 9062 states and 34745 transitions. Word has length 28 [2022-03-03 20:22:59,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:22:59,298 INFO L470 AbstractCegarLoop]: Abstraction has 9062 states and 34745 transitions. [2022-03-03 20:22:59,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:22:59,299 INFO L276 IsEmpty]: Start isEmpty. Operand 9062 states and 34745 transitions. [2022-03-03 20:22:59,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:22:59,313 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:22:59,313 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:22:59,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-03-03 20:22:59,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-03 20:22:59,513 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:22:59,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:22:59,514 INFO L85 PathProgramCache]: Analyzing trace with hash -919356004, now seen corresponding path program 83 times [2022-03-03 20:22:59,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:22:59,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124087328] [2022-03-03 20:22:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:22:59,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:22:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:22:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:59,563 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:22:59,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124087328] [2022-03-03 20:22:59,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124087328] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:22:59,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952891877] [2022-03-03 20:22:59,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:22:59,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:22:59,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:22:59,565 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:22:59,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-03 20:22:59,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 20:22:59,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:22:59,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:22:59,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:22:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:59,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:22:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:22:59,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952891877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:22:59,768 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:22:59,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 17 [2022-03-03 20:22:59,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133134090] [2022-03-03 20:22:59,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:22:59,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:22:59,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:22:59,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:22:59,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:22:59,768 INFO L87 Difference]: Start difference. First operand 9062 states and 34745 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:00,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:00,938 INFO L93 Difference]: Finished difference Result 17840 states and 62687 transitions. [2022-03-03 20:23:00,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-03 20:23:00,939 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:23:00,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:01,081 INFO L225 Difference]: With dead ends: 17840 [2022-03-03 20:23:01,081 INFO L226 Difference]: Without dead ends: 17836 [2022-03-03 20:23:01,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2276 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1477, Invalid=5003, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 20:23:01,082 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 599 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:01,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 268 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:23:01,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17836 states. [2022-03-03 20:23:01,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17836 to 8772. [2022-03-03 20:23:01,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8772 states, 8771 states have (on average 3.851100216622962) internal successors, (33778), 8771 states have internal predecessors, (33778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:01,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8772 states to 8772 states and 33778 transitions. [2022-03-03 20:23:01,389 INFO L78 Accepts]: Start accepts. Automaton has 8772 states and 33778 transitions. Word has length 28 [2022-03-03 20:23:01,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:01,389 INFO L470 AbstractCegarLoop]: Abstraction has 8772 states and 33778 transitions. [2022-03-03 20:23:01,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:01,389 INFO L276 IsEmpty]: Start isEmpty. Operand 8772 states and 33778 transitions. [2022-03-03 20:23:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:01,403 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:01,403 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:01,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-03-03 20:23:01,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-03-03 20:23:01,603 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:01,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:01,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1191365194, now seen corresponding path program 84 times [2022-03-03 20:23:01,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:01,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643079625] [2022-03-03 20:23:01,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:01,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:01,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:01,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:01,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643079625] [2022-03-03 20:23:01,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643079625] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:01,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990894614] [2022-03-03 20:23:01,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:23:01,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:01,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:01,655 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:01,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-03 20:23:01,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:23:01,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:23:01,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:23:01,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:01,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:01,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990894614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:01,932 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:01,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2022-03-03 20:23:01,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536174232] [2022-03-03 20:23:01,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:01,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 20:23:01,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:01,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 20:23:01,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-03-03 20:23:01,932 INFO L87 Difference]: Start difference. First operand 8772 states and 33778 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:05,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:05,543 INFO L93 Difference]: Finished difference Result 25466 states and 88615 transitions. [2022-03-03 20:23:05,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2022-03-03 20:23:05,543 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:23:05,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:05,615 INFO L225 Difference]: With dead ends: 25466 [2022-03-03 20:23:05,616 INFO L226 Difference]: Without dead ends: 25466 [2022-03-03 20:23:05,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20003 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=8056, Invalid=35000, Unknown=0, NotChecked=0, Total=43056 [2022-03-03 20:23:05,619 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1027 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:05,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1027 Valid, 416 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:23:05,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25466 states. [2022-03-03 20:23:05,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25466 to 9231. [2022-03-03 20:23:05,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9231 states, 9230 states have (on average 3.9005417118093173) internal successors, (36002), 9230 states have internal predecessors, (36002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:06,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9231 states to 9231 states and 36002 transitions. [2022-03-03 20:23:06,012 INFO L78 Accepts]: Start accepts. Automaton has 9231 states and 36002 transitions. Word has length 28 [2022-03-03 20:23:06,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:06,012 INFO L470 AbstractCegarLoop]: Abstraction has 9231 states and 36002 transitions. [2022-03-03 20:23:06,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:06,012 INFO L276 IsEmpty]: Start isEmpty. Operand 9231 states and 36002 transitions. [2022-03-03 20:23:06,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:06,027 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:06,027 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:06,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-03-03 20:23:06,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:06,228 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:06,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:06,228 INFO L85 PathProgramCache]: Analyzing trace with hash -624413114, now seen corresponding path program 85 times [2022-03-03 20:23:06,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:06,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20443131] [2022-03-03 20:23:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:06,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:06,267 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:06,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20443131] [2022-03-03 20:23:06,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20443131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:06,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902876949] [2022-03-03 20:23:06,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:23:06,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:06,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:06,268 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:06,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-03 20:23:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:06,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:23:06,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:06,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:06,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:06,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902876949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:06,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:06,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2022-03-03 20:23:06,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109794343] [2022-03-03 20:23:06,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:06,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 20:23:06,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:06,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 20:23:06,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-03-03 20:23:06,526 INFO L87 Difference]: Start difference. First operand 9231 states and 36002 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:09,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:09,251 INFO L93 Difference]: Finished difference Result 23850 states and 83310 transitions. [2022-03-03 20:23:09,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-03-03 20:23:09,251 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:23:09,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:09,305 INFO L225 Difference]: With dead ends: 23850 [2022-03-03 20:23:09,305 INFO L226 Difference]: Without dead ends: 23850 [2022-03-03 20:23:09,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11791 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5497, Invalid=20263, Unknown=0, NotChecked=0, Total=25760 [2022-03-03 20:23:09,308 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 826 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:09,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 524 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:23:09,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23850 states. [2022-03-03 20:23:09,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23850 to 9146. [2022-03-03 20:23:09,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9146 states, 9145 states have (on average 3.887916894477857) internal successors, (35555), 9145 states have internal predecessors, (35555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:09,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9146 states to 9146 states and 35555 transitions. [2022-03-03 20:23:09,649 INFO L78 Accepts]: Start accepts. Automaton has 9146 states and 35555 transitions. Word has length 28 [2022-03-03 20:23:09,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:09,650 INFO L470 AbstractCegarLoop]: Abstraction has 9146 states and 35555 transitions. [2022-03-03 20:23:09,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:09,650 INFO L276 IsEmpty]: Start isEmpty. Operand 9146 states and 35555 transitions. [2022-03-03 20:23:09,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:09,664 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:09,664 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:09,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-03-03 20:23:09,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2022-03-03 20:23:09,865 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:09,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:09,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1796758972, now seen corresponding path program 86 times [2022-03-03 20:23:09,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:09,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973407022] [2022-03-03 20:23:09,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:09,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:09,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:09,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973407022] [2022-03-03 20:23:09,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973407022] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:09,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271075337] [2022-03-03 20:23:09,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:23:09,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:09,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:09,904 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:09,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-03 20:23:09,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:23:09,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:23:09,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:23:09,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:10,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:10,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271075337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:10,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:10,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 19 [2022-03-03 20:23:10,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176912180] [2022-03-03 20:23:10,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:10,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 20:23:10,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:10,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 20:23:10,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-03-03 20:23:10,131 INFO L87 Difference]: Start difference. First operand 9146 states and 35555 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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) [2022-03-03 20:23:12,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:12,462 INFO L93 Difference]: Finished difference Result 22084 states and 75856 transitions. [2022-03-03 20:23:12,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-03-03 20:23:12,463 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 28 [2022-03-03 20:23:12,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:12,514 INFO L225 Difference]: With dead ends: 22084 [2022-03-03 20:23:12,514 INFO L226 Difference]: Without dead ends: 22084 [2022-03-03 20:23:12,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9684 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4569, Invalid=16893, Unknown=0, NotChecked=0, Total=21462 [2022-03-03 20:23:12,517 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 734 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:12,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 423 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1415 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 20:23:12,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22084 states. [2022-03-03 20:23:12,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22084 to 9204. [2022-03-03 20:23:12,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9204 states, 9203 states have (on average 3.8889492556774963) internal successors, (35790), 9203 states have internal predecessors, (35790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:12,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9204 states to 9204 states and 35790 transitions. [2022-03-03 20:23:12,861 INFO L78 Accepts]: Start accepts. Automaton has 9204 states and 35790 transitions. Word has length 28 [2022-03-03 20:23:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:12,861 INFO L470 AbstractCegarLoop]: Abstraction has 9204 states and 35790 transitions. [2022-03-03 20:23:12,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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) [2022-03-03 20:23:12,861 INFO L276 IsEmpty]: Start isEmpty. Operand 9204 states and 35790 transitions. [2022-03-03 20:23:12,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:12,876 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:12,877 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:12,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-03-03 20:23:13,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:13,077 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:13,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:13,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1715382884, now seen corresponding path program 87 times [2022-03-03 20:23:13,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:13,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988041314] [2022-03-03 20:23:13,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:13,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:13,115 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:13,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988041314] [2022-03-03 20:23:13,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988041314] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:13,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108266408] [2022-03-03 20:23:13,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:23:13,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:13,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:13,116 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:13,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-03 20:23:13,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 20:23:13,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:23:13,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:23:13,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:13,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:13,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108266408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:13,377 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:13,377 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 19 [2022-03-03 20:23:13,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309315981] [2022-03-03 20:23:13,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:13,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 20:23:13,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:13,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 20:23:13,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-03-03 20:23:13,378 INFO L87 Difference]: Start difference. First operand 9204 states and 35790 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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) [2022-03-03 20:23:15,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:15,368 INFO L93 Difference]: Finished difference Result 21078 states and 73293 transitions. [2022-03-03 20:23:15,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-03-03 20:23:15,368 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 28 [2022-03-03 20:23:15,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:15,414 INFO L225 Difference]: With dead ends: 21078 [2022-03-03 20:23:15,414 INFO L226 Difference]: Without dead ends: 21070 [2022-03-03 20:23:15,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7026 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3686, Invalid=13084, Unknown=0, NotChecked=0, Total=16770 [2022-03-03 20:23:15,416 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 852 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:15,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [852 Valid, 406 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:23:15,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21070 states. [2022-03-03 20:23:15,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21070 to 9024. [2022-03-03 20:23:15,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9024 states, 9023 states have (on average 3.874321179208689) internal successors, (34958), 9023 states have internal predecessors, (34958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:15,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9024 states to 9024 states and 34958 transitions. [2022-03-03 20:23:15,729 INFO L78 Accepts]: Start accepts. Automaton has 9024 states and 34958 transitions. Word has length 28 [2022-03-03 20:23:15,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:15,729 INFO L470 AbstractCegarLoop]: Abstraction has 9024 states and 34958 transitions. [2022-03-03 20:23:15,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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) [2022-03-03 20:23:15,730 INFO L276 IsEmpty]: Start isEmpty. Operand 9024 states and 34958 transitions. [2022-03-03 20:23:15,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:15,744 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:15,744 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:15,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-03-03 20:23:15,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:15,944 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:15,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:15,945 INFO L85 PathProgramCache]: Analyzing trace with hash -784725668, now seen corresponding path program 88 times [2022-03-03 20:23:15,945 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:15,945 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882183075] [2022-03-03 20:23:15,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:15,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:15,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:15,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882183075] [2022-03-03 20:23:15,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882183075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:15,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477104076] [2022-03-03 20:23:15,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:23:15,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:15,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:15,996 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:15,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-03 20:23:16,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:23:16,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:23:16,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:23:16,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:16,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:16,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477104076] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:16,243 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:16,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2022-03-03 20:23:16,243 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536897631] [2022-03-03 20:23:16,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:16,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 20:23:16,243 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:16,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 20:23:16,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-03-03 20:23:16,243 INFO L87 Difference]: Start difference. First operand 9024 states and 34958 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:18,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:18,808 INFO L93 Difference]: Finished difference Result 20447 states and 70072 transitions. [2022-03-03 20:23:18,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-03-03 20:23:18,808 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:23:18,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:18,852 INFO L225 Difference]: With dead ends: 20447 [2022-03-03 20:23:18,853 INFO L226 Difference]: Without dead ends: 20447 [2022-03-03 20:23:18,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9264 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4648, Invalid=17108, Unknown=0, NotChecked=0, Total=21756 [2022-03-03 20:23:18,855 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 914 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:18,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [914 Valid, 525 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1642 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:23:18,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20447 states. [2022-03-03 20:23:19,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20447 to 9040. [2022-03-03 20:23:19,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9040 states, 9039 states have (on average 3.8745436442084302) internal successors, (35022), 9039 states have internal predecessors, (35022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:19,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9040 states to 9040 states and 35022 transitions. [2022-03-03 20:23:19,149 INFO L78 Accepts]: Start accepts. Automaton has 9040 states and 35022 transitions. Word has length 28 [2022-03-03 20:23:19,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:19,149 INFO L470 AbstractCegarLoop]: Abstraction has 9040 states and 35022 transitions. [2022-03-03 20:23:19,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:19,149 INFO L276 IsEmpty]: Start isEmpty. Operand 9040 states and 35022 transitions. [2022-03-03 20:23:19,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:19,164 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:19,164 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:19,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-03-03 20:23:19,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:19,364 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:19,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:19,364 INFO L85 PathProgramCache]: Analyzing trace with hash 858313486, now seen corresponding path program 89 times [2022-03-03 20:23:19,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:19,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366653397] [2022-03-03 20:23:19,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:19,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:19,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:19,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366653397] [2022-03-03 20:23:19,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366653397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:19,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135811053] [2022-03-03 20:23:19,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:23:19,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:19,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:19,414 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:19,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-03 20:23:19,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 20:23:19,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:23:19,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:23:19,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:19,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:19,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135811053] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:19,707 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:19,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2022-03-03 20:23:19,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798613526] [2022-03-03 20:23:19,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:19,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 20:23:19,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:19,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 20:23:19,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-03-03 20:23:19,708 INFO L87 Difference]: Start difference. First operand 9040 states and 35022 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:22,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:22,604 INFO L93 Difference]: Finished difference Result 19748 states and 69189 transitions. [2022-03-03 20:23:22,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-03-03 20:23:22,604 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:23:22,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:22,647 INFO L225 Difference]: With dead ends: 19748 [2022-03-03 20:23:22,648 INFO L226 Difference]: Without dead ends: 19740 [2022-03-03 20:23:22,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12753 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5782, Invalid=23974, Unknown=0, NotChecked=0, Total=29756 [2022-03-03 20:23:22,651 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 775 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:22,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 524 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1666 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:23:22,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19740 states. [2022-03-03 20:23:22,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19740 to 8169. [2022-03-03 20:23:22,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8169 states, 8168 states have (on average 3.803501469147894) internal successors, (31067), 8168 states have internal predecessors, (31067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:23,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8169 states to 8169 states and 31067 transitions. [2022-03-03 20:23:23,027 INFO L78 Accepts]: Start accepts. Automaton has 8169 states and 31067 transitions. Word has length 28 [2022-03-03 20:23:23,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:23,027 INFO L470 AbstractCegarLoop]: Abstraction has 8169 states and 31067 transitions. [2022-03-03 20:23:23,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:23,027 INFO L276 IsEmpty]: Start isEmpty. Operand 8169 states and 31067 transitions. [2022-03-03 20:23:23,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:23,040 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:23,040 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:23,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-03-03 20:23:23,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:23,241 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:23,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:23,241 INFO L85 PathProgramCache]: Analyzing trace with hash 941717066, now seen corresponding path program 90 times [2022-03-03 20:23:23,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:23,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765174573] [2022-03-03 20:23:23,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:23,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:23,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:23,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765174573] [2022-03-03 20:23:23,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765174573] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:23,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597692238] [2022-03-03 20:23:23,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:23:23,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:23,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:23,282 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:23,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-03 20:23:23,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 20:23:23,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:23:23,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:23:23,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:23,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:23,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597692238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:23,507 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:23,507 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-03-03 20:23:23,507 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593363264] [2022-03-03 20:23:23,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:23,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 20:23:23,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:23,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 20:23:23,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-03-03 20:23:23,508 INFO L87 Difference]: Start difference. First operand 8169 states and 31067 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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) [2022-03-03 20:23:25,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:25,586 INFO L93 Difference]: Finished difference Result 17387 states and 58830 transitions. [2022-03-03 20:23:25,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-03 20:23:25,586 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 28 [2022-03-03 20:23:25,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:25,623 INFO L225 Difference]: With dead ends: 17387 [2022-03-03 20:23:25,623 INFO L226 Difference]: Without dead ends: 17387 [2022-03-03 20:23:25,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7132 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3292, Invalid=14264, Unknown=0, NotChecked=0, Total=17556 [2022-03-03 20:23:25,625 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 600 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:25,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 498 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1385 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:23:25,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17387 states. [2022-03-03 20:23:25,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17387 to 8189. [2022-03-03 20:23:25,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8189 states, 8188 states have (on average 3.802027357107963) internal successors, (31131), 8188 states have internal predecessors, (31131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:25,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8189 states to 8189 states and 31131 transitions. [2022-03-03 20:23:25,863 INFO L78 Accepts]: Start accepts. Automaton has 8189 states and 31131 transitions. Word has length 28 [2022-03-03 20:23:25,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:25,864 INFO L470 AbstractCegarLoop]: Abstraction has 8189 states and 31131 transitions. [2022-03-03 20:23:25,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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) [2022-03-03 20:23:25,864 INFO L276 IsEmpty]: Start isEmpty. Operand 8189 states and 31131 transitions. [2022-03-03 20:23:25,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:25,876 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:25,876 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:25,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-03-03 20:23:26,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:26,077 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:26,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:26,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1699890054, now seen corresponding path program 91 times [2022-03-03 20:23:26,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:26,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205905907] [2022-03-03 20:23:26,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:26,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:26,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:26,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205905907] [2022-03-03 20:23:26,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205905907] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:26,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212178827] [2022-03-03 20:23:26,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:23:26,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:26,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:26,117 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:26,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-03 20:23:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:26,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:23:26,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:26,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:26,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212178827] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:26,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:26,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-03-03 20:23:26,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422231727] [2022-03-03 20:23:26,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:26,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 20:23:26,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:26,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 20:23:26,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-03-03 20:23:26,399 INFO L87 Difference]: Start difference. First operand 8189 states and 31131 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:29,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:29,582 INFO L93 Difference]: Finished difference Result 18253 states and 61191 transitions. [2022-03-03 20:23:29,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-03-03 20:23:29,582 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:23:29,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:29,620 INFO L225 Difference]: With dead ends: 18253 [2022-03-03 20:23:29,621 INFO L226 Difference]: Without dead ends: 18253 [2022-03-03 20:23:29,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15900 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5934, Invalid=30356, Unknown=0, NotChecked=0, Total=36290 [2022-03-03 20:23:29,625 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 811 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 1853 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:29,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 615 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1853 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:23:29,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18253 states. [2022-03-03 20:23:29,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18253 to 8309. [2022-03-03 20:23:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8309 states, 8308 states have (on average 3.7930909966297546) internal successors, (31513), 8308 states have internal predecessors, (31513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:29,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8309 states to 8309 states and 31513 transitions. [2022-03-03 20:23:29,955 INFO L78 Accepts]: Start accepts. Automaton has 8309 states and 31513 transitions. Word has length 28 [2022-03-03 20:23:29,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:29,956 INFO L470 AbstractCegarLoop]: Abstraction has 8309 states and 31513 transitions. [2022-03-03 20:23:29,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:29,956 INFO L276 IsEmpty]: Start isEmpty. Operand 8309 states and 31513 transitions. [2022-03-03 20:23:29,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:29,968 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:29,968 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:29,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-03-03 20:23:30,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-03-03 20:23:30,169 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:30,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:30,169 INFO L85 PathProgramCache]: Analyzing trace with hash -56850900, now seen corresponding path program 92 times [2022-03-03 20:23:30,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:30,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161760912] [2022-03-03 20:23:30,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:30,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:30,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:30,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161760912] [2022-03-03 20:23:30,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161760912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:30,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571684129] [2022-03-03 20:23:30,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:23:30,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:30,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:30,209 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:30,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-03 20:23:30,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:23:30,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:23:30,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:23:30,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:30,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:30,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:30,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571684129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:30,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:30,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-03-03 20:23:30,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301309452] [2022-03-03 20:23:30,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:30,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 20:23:30,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:30,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 20:23:30,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-03-03 20:23:30,446 INFO L87 Difference]: Start difference. First operand 8309 states and 31513 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:32,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:32,939 INFO L93 Difference]: Finished difference Result 16806 states and 57197 transitions. [2022-03-03 20:23:32,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-03-03 20:23:32,939 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:23:32,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:32,975 INFO L225 Difference]: With dead ends: 16806 [2022-03-03 20:23:32,975 INFO L226 Difference]: Without dead ends: 16798 [2022-03-03 20:23:32,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9327 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4289, Invalid=18361, Unknown=0, NotChecked=0, Total=22650 [2022-03-03 20:23:32,978 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 658 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1881 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:32,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 612 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1881 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:23:32,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16798 states. [2022-03-03 20:23:33,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16798 to 8235. [2022-03-03 20:23:33,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8235 states, 8234 states have (on average 3.7946320136021376) internal successors, (31245), 8234 states have internal predecessors, (31245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:33,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8235 states to 8235 states and 31245 transitions. [2022-03-03 20:23:33,291 INFO L78 Accepts]: Start accepts. Automaton has 8235 states and 31245 transitions. Word has length 28 [2022-03-03 20:23:33,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:33,292 INFO L470 AbstractCegarLoop]: Abstraction has 8235 states and 31245 transitions. [2022-03-03 20:23:33,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:33,292 INFO L276 IsEmpty]: Start isEmpty. Operand 8235 states and 31245 transitions. [2022-03-03 20:23:33,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:33,304 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:33,304 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:33,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-03-03 20:23:33,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-03-03 20:23:33,505 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:33,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:33,505 INFO L85 PathProgramCache]: Analyzing trace with hash 522592324, now seen corresponding path program 65 times [2022-03-03 20:23:33,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:33,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325977479] [2022-03-03 20:23:33,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:33,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:33,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:33,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325977479] [2022-03-03 20:23:33,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325977479] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:33,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014166604] [2022-03-03 20:23:33,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:23:33,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:33,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:33,549 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:33,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-03 20:23:33,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 20:23:33,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:23:33,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:23:33,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:33,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:33,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014166604] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:33,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:33,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-03 20:23:33,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714201210] [2022-03-03 20:23:33,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:33,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:23:33,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:33,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:23:33,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:23:33,737 INFO L87 Difference]: Start difference. First operand 8235 states and 31245 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:34,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:34,861 INFO L93 Difference]: Finished difference Result 16714 states and 58049 transitions. [2022-03-03 20:23:34,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-03 20:23:34,861 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:23:34,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:34,896 INFO L225 Difference]: With dead ends: 16714 [2022-03-03 20:23:34,896 INFO L226 Difference]: Without dead ends: 16714 [2022-03-03 20:23:34,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2356 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1332, Invalid=5474, Unknown=0, NotChecked=0, Total=6806 [2022-03-03 20:23:34,897 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 512 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:34,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 316 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:23:34,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16714 states. [2022-03-03 20:23:35,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16714 to 8257. [2022-03-03 20:23:35,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8257 states, 8256 states have (on average 3.794089147286822) internal successors, (31324), 8256 states have internal predecessors, (31324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:35,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8257 states to 8257 states and 31324 transitions. [2022-03-03 20:23:35,099 INFO L78 Accepts]: Start accepts. Automaton has 8257 states and 31324 transitions. Word has length 28 [2022-03-03 20:23:35,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:35,099 INFO L470 AbstractCegarLoop]: Abstraction has 8257 states and 31324 transitions. [2022-03-03 20:23:35,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:35,099 INFO L276 IsEmpty]: Start isEmpty. Operand 8257 states and 31324 transitions. [2022-03-03 20:23:35,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:35,112 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:35,112 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:35,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-03-03 20:23:35,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-03-03 20:23:35,313 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:35,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:35,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1089207438, now seen corresponding path program 66 times [2022-03-03 20:23:35,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:35,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155891518] [2022-03-03 20:23:35,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:35,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:35,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:35,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:35,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155891518] [2022-03-03 20:23:35,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155891518] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:35,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674093359] [2022-03-03 20:23:35,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:23:35,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:35,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:35,357 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:35,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-03 20:23:35,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:23:35,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:23:35,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:23:35,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:35,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:35,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:35,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674093359] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:35,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:35,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-03 20:23:35,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47155981] [2022-03-03 20:23:35,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:35,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:23:35,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:35,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:23:35,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:23:35,549 INFO L87 Difference]: Start difference. First operand 8257 states and 31324 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:37,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:37,016 INFO L93 Difference]: Finished difference Result 17529 states and 60234 transitions. [2022-03-03 20:23:37,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-03 20:23:37,016 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:23:37,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:37,063 INFO L225 Difference]: With dead ends: 17529 [2022-03-03 20:23:37,063 INFO L226 Difference]: Without dead ends: 17529 [2022-03-03 20:23:37,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3262 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1763, Invalid=7167, Unknown=0, NotChecked=0, Total=8930 [2022-03-03 20:23:37,064 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 460 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:37,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 458 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:23:37,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17529 states. [2022-03-03 20:23:37,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17529 to 8325. [2022-03-03 20:23:37,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8325 states, 8324 states have (on average 3.7873618452666986) internal successors, (31526), 8324 states have internal predecessors, (31526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:37,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8325 states to 8325 states and 31526 transitions. [2022-03-03 20:23:37,350 INFO L78 Accepts]: Start accepts. Automaton has 8325 states and 31526 transitions. Word has length 28 [2022-03-03 20:23:37,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:37,350 INFO L470 AbstractCegarLoop]: Abstraction has 8325 states and 31526 transitions. [2022-03-03 20:23:37,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:37,350 INFO L276 IsEmpty]: Start isEmpty. Operand 8325 states and 31526 transitions. [2022-03-03 20:23:37,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:37,363 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:37,363 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:37,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-03-03 20:23:37,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:37,563 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:37,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:37,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1320747086, now seen corresponding path program 67 times [2022-03-03 20:23:37,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:37,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624078615] [2022-03-03 20:23:37,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:37,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:37,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:37,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624078615] [2022-03-03 20:23:37,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624078615] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:37,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139113531] [2022-03-03 20:23:37,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:23:37,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:37,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:37,607 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:37,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-03 20:23:37,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:37,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:23:37,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:37,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:37,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139113531] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:37,794 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:37,794 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-03 20:23:37,794 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898637335] [2022-03-03 20:23:37,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:37,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:23:37,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:37,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:23:37,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:23:37,794 INFO L87 Difference]: Start difference. First operand 8325 states and 31526 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:39,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:39,219 INFO L93 Difference]: Finished difference Result 17153 states and 59705 transitions. [2022-03-03 20:23:39,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-03 20:23:39,219 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:23:39,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:39,255 INFO L225 Difference]: With dead ends: 17153 [2022-03-03 20:23:39,255 INFO L226 Difference]: Without dead ends: 17153 [2022-03-03 20:23:39,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4063 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2029, Invalid=8683, Unknown=0, NotChecked=0, Total=10712 [2022-03-03 20:23:39,257 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 538 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:39,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 338 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:23:39,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17153 states. [2022-03-03 20:23:39,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17153 to 8623. [2022-03-03 20:23:39,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8623 states, 8622 states have (on average 3.772326606355834) internal successors, (32525), 8622 states have internal predecessors, (32525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:39,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8623 states to 8623 states and 32525 transitions. [2022-03-03 20:23:39,477 INFO L78 Accepts]: Start accepts. Automaton has 8623 states and 32525 transitions. Word has length 28 [2022-03-03 20:23:39,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:39,477 INFO L470 AbstractCegarLoop]: Abstraction has 8623 states and 32525 transitions. [2022-03-03 20:23:39,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:39,477 INFO L276 IsEmpty]: Start isEmpty. Operand 8623 states and 32525 transitions. [2022-03-03 20:23:39,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:39,490 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:39,490 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:39,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-03-03 20:23:39,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:39,691 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:39,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:39,691 INFO L85 PathProgramCache]: Analyzing trace with hash -932691624, now seen corresponding path program 68 times [2022-03-03 20:23:39,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:39,691 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543891231] [2022-03-03 20:23:39,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:39,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:39,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:39,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543891231] [2022-03-03 20:23:39,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543891231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:39,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163633771] [2022-03-03 20:23:39,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:23:39,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:39,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:39,728 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:39,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-03 20:23:39,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:23:39,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:23:39,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:23:39,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:39,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:39,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163633771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:39,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:39,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2022-03-03 20:23:39,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550310974] [2022-03-03 20:23:39,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:39,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:23:39,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:39,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:23:39,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:23:39,930 INFO L87 Difference]: Start difference. First operand 8623 states and 32525 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:40,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:40,482 INFO L93 Difference]: Finished difference Result 13956 states and 50746 transitions. [2022-03-03 20:23:40,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 20:23:40,482 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:23:40,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:40,512 INFO L225 Difference]: With dead ends: 13956 [2022-03-03 20:23:40,512 INFO L226 Difference]: Without dead ends: 13956 [2022-03-03 20:23:40,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=545, Invalid=1347, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 20:23:40,513 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 331 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:40,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 188 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:23:40,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13956 states. [2022-03-03 20:23:40,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13956 to 9846. [2022-03-03 20:23:40,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9846 states, 9845 states have (on average 3.8252920264093446) internal successors, (37660), 9845 states have internal predecessors, (37660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9846 states to 9846 states and 37660 transitions. [2022-03-03 20:23:40,710 INFO L78 Accepts]: Start accepts. Automaton has 9846 states and 37660 transitions. Word has length 28 [2022-03-03 20:23:40,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:40,710 INFO L470 AbstractCegarLoop]: Abstraction has 9846 states and 37660 transitions. [2022-03-03 20:23:40,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:40,710 INFO L276 IsEmpty]: Start isEmpty. Operand 9846 states and 37660 transitions. [2022-03-03 20:23:40,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:40,725 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:40,725 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:40,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-03-03 20:23:40,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:40,926 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:40,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:40,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1365568228, now seen corresponding path program 69 times [2022-03-03 20:23:40,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:40,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808403588] [2022-03-03 20:23:40,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:40,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:40,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:40,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808403588] [2022-03-03 20:23:40,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808403588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:40,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989197252] [2022-03-03 20:23:40,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:23:40,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:40,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:40,969 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:40,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-03 20:23:40,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 20:23:40,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:23:40,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:23:40,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:41,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:41,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989197252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:41,150 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:41,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-03 20:23:41,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450936837] [2022-03-03 20:23:41,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:41,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:23:41,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:41,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:23:41,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:23:41,151 INFO L87 Difference]: Start difference. First operand 9846 states and 37660 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:42,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:42,379 INFO L93 Difference]: Finished difference Result 18161 states and 64894 transitions. [2022-03-03 20:23:42,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-03 20:23:42,380 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:23:42,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:42,419 INFO L225 Difference]: With dead ends: 18161 [2022-03-03 20:23:42,419 INFO L226 Difference]: Without dead ends: 18157 [2022-03-03 20:23:42,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2883 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1698, Invalid=6492, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 20:23:42,420 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 485 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:42,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 293 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:23:42,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18157 states. [2022-03-03 20:23:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18157 to 9598. [2022-03-03 20:23:42,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9598 states, 9597 states have (on average 3.8386995936230073) internal successors, (36840), 9597 states have internal predecessors, (36840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:42,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9598 states to 9598 states and 36840 transitions. [2022-03-03 20:23:42,672 INFO L78 Accepts]: Start accepts. Automaton has 9598 states and 36840 transitions. Word has length 28 [2022-03-03 20:23:42,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:42,672 INFO L470 AbstractCegarLoop]: Abstraction has 9598 states and 36840 transitions. [2022-03-03 20:23:42,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:42,673 INFO L276 IsEmpty]: Start isEmpty. Operand 9598 states and 36840 transitions. [2022-03-03 20:23:42,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:42,687 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:42,687 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:42,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-03-03 20:23:42,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:42,888 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:42,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:42,888 INFO L85 PathProgramCache]: Analyzing trace with hash 654689240, now seen corresponding path program 93 times [2022-03-03 20:23:42,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:42,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046017376] [2022-03-03 20:23:42,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:42,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:42,921 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:42,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046017376] [2022-03-03 20:23:42,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046017376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:42,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996332474] [2022-03-03 20:23:42,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:23:42,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:42,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:42,955 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:42,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-03 20:23:42,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 20:23:42,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:23:42,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 20:23:42,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:43,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:43,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996332474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:43,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:43,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-03-03 20:23:43,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458542468] [2022-03-03 20:23:43,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:43,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 20:23:43,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:43,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 20:23:43,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-03-03 20:23:43,163 INFO L87 Difference]: Start difference. First operand 9598 states and 36840 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:44,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:44,365 INFO L93 Difference]: Finished difference Result 20165 states and 72760 transitions. [2022-03-03 20:23:44,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-03 20:23:44,365 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:23:44,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:44,409 INFO L225 Difference]: With dead ends: 20165 [2022-03-03 20:23:44,410 INFO L226 Difference]: Without dead ends: 20141 [2022-03-03 20:23:44,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1647, Invalid=3903, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 20:23:44,411 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 493 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:44,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 288 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:23:44,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20141 states. [2022-03-03 20:23:44,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20141 to 11719. [2022-03-03 20:23:44,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11719 states, 11718 states have (on average 3.9720942140296978) internal successors, (46545), 11718 states have internal predecessors, (46545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:44,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11719 states to 11719 states and 46545 transitions. [2022-03-03 20:23:44,712 INFO L78 Accepts]: Start accepts. Automaton has 11719 states and 46545 transitions. Word has length 28 [2022-03-03 20:23:44,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:44,712 INFO L470 AbstractCegarLoop]: Abstraction has 11719 states and 46545 transitions. [2022-03-03 20:23:44,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:44,712 INFO L276 IsEmpty]: Start isEmpty. Operand 11719 states and 46545 transitions. [2022-03-03 20:23:44,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:44,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:44,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:44,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-03-03 20:23:44,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:44,931 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:44,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:44,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1598936656, now seen corresponding path program 94 times [2022-03-03 20:23:44,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:44,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827640808] [2022-03-03 20:23:44,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:44,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:44,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:44,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827640808] [2022-03-03 20:23:44,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827640808] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:44,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048829592] [2022-03-03 20:23:44,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:23:44,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:44,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:44,964 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:44,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-03 20:23:44,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:23:44,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:23:44,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 20:23:44,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:45,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:45,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048829592] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:45,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:45,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-03-03 20:23:45,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219918051] [2022-03-03 20:23:45,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:45,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 20:23:45,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:45,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 20:23:45,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-03-03 20:23:45,171 INFO L87 Difference]: Start difference. First operand 11719 states and 46545 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:46,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:46,632 INFO L93 Difference]: Finished difference Result 24453 states and 85433 transitions. [2022-03-03 20:23:46,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-03 20:23:46,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:23:46,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:46,766 INFO L225 Difference]: With dead ends: 24453 [2022-03-03 20:23:46,766 INFO L226 Difference]: Without dead ends: 24453 [2022-03-03 20:23:46,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3233 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2115, Invalid=5717, Unknown=0, NotChecked=0, Total=7832 [2022-03-03 20:23:46,767 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 618 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:46,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 374 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:23:46,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24453 states. [2022-03-03 20:23:47,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24453 to 11722. [2022-03-03 20:23:47,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11722 states, 11721 states have (on average 3.9577681085231635) internal successors, (46389), 11721 states have internal predecessors, (46389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:47,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11722 states to 11722 states and 46389 transitions. [2022-03-03 20:23:47,074 INFO L78 Accepts]: Start accepts. Automaton has 11722 states and 46389 transitions. Word has length 28 [2022-03-03 20:23:47,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:47,074 INFO L470 AbstractCegarLoop]: Abstraction has 11722 states and 46389 transitions. [2022-03-03 20:23:47,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:47,074 INFO L276 IsEmpty]: Start isEmpty. Operand 11722 states and 46389 transitions. [2022-03-03 20:23:47,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:47,093 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:47,093 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:47,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-03-03 20:23:47,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:47,293 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:47,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:47,294 INFO L85 PathProgramCache]: Analyzing trace with hash -619472876, now seen corresponding path program 95 times [2022-03-03 20:23:47,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:47,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030441126] [2022-03-03 20:23:47,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:47,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:47,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:47,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030441126] [2022-03-03 20:23:47,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030441126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:47,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899329890] [2022-03-03 20:23:47,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:23:47,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:47,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:47,331 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:47,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-03 20:23:47,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 20:23:47,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:23:47,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 20:23:47,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:47,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:47,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:47,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899329890] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:47,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:47,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-03 20:23:47,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603460350] [2022-03-03 20:23:47,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:47,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:23:47,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:47,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:23:47,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:23:47,489 INFO L87 Difference]: Start difference. First operand 11722 states and 46389 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:48,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:48,226 INFO L93 Difference]: Finished difference Result 22330 states and 83311 transitions. [2022-03-03 20:23:48,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 20:23:48,227 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:23:48,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:48,279 INFO L225 Difference]: With dead ends: 22330 [2022-03-03 20:23:48,279 INFO L226 Difference]: Without dead ends: 22070 [2022-03-03 20:23:48,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=652, Invalid=2000, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 20:23:48,279 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 351 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:48,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 193 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:23:48,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22070 states. [2022-03-03 20:23:48,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22070 to 15934. [2022-03-03 20:23:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15934 states, 15933 states have (on average 4.017636352224942) internal successors, (64013), 15933 states have internal predecessors, (64013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:48,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15934 states to 15934 states and 64013 transitions. [2022-03-03 20:23:48,725 INFO L78 Accepts]: Start accepts. Automaton has 15934 states and 64013 transitions. Word has length 28 [2022-03-03 20:23:48,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:48,725 INFO L470 AbstractCegarLoop]: Abstraction has 15934 states and 64013 transitions. [2022-03-03 20:23:48,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 15934 states and 64013 transitions. [2022-03-03 20:23:48,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:48,752 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:48,752 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:48,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-03-03 20:23:48,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2022-03-03 20:23:48,952 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:48,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:48,953 INFO L85 PathProgramCache]: Analyzing trace with hash -36116904, now seen corresponding path program 96 times [2022-03-03 20:23:48,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:48,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459707916] [2022-03-03 20:23:48,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:48,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:23:48,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:48,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459707916] [2022-03-03 20:23:48,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459707916] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:48,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435807049] [2022-03-03 20:23:48,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:23:48,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:48,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:48,983 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:48,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-03 20:23:49,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:23:49,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:23:49,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:23:49,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:23:49,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:23:49,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435807049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:49,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:49,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 13 [2022-03-03 20:23:49,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369592623] [2022-03-03 20:23:49,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:49,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:23:49,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:49,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:23:49,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:23:49,151 INFO L87 Difference]: Start difference. First operand 15934 states and 64013 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:49,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:49,518 INFO L93 Difference]: Finished difference Result 22929 states and 85346 transitions. [2022-03-03 20:23:49,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 20:23:49,518 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:23:49,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:49,571 INFO L225 Difference]: With dead ends: 22929 [2022-03-03 20:23:49,571 INFO L226 Difference]: Without dead ends: 22929 [2022-03-03 20:23:49,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=602, Unknown=0, NotChecked=0, Total=930 [2022-03-03 20:23:49,572 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 321 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:49,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 78 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:23:49,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22929 states. [2022-03-03 20:23:49,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22929 to 16022. [2022-03-03 20:23:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16022 states, 16021 states have (on average 4.00280881343237) internal successors, (64129), 16021 states have internal predecessors, (64129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:49,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16022 states to 16022 states and 64129 transitions. [2022-03-03 20:23:49,928 INFO L78 Accepts]: Start accepts. Automaton has 16022 states and 64129 transitions. Word has length 28 [2022-03-03 20:23:49,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:49,928 INFO L470 AbstractCegarLoop]: Abstraction has 16022 states and 64129 transitions. [2022-03-03 20:23:49,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:49,928 INFO L276 IsEmpty]: Start isEmpty. Operand 16022 states and 64129 transitions. [2022-03-03 20:23:49,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:49,955 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:49,955 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:49,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-03-03 20:23:50,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-03-03 20:23:50,155 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:50,155 INFO L85 PathProgramCache]: Analyzing trace with hash -664128222, now seen corresponding path program 97 times [2022-03-03 20:23:50,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:50,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867439930] [2022-03-03 20:23:50,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:50,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:50,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:50,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:50,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867439930] [2022-03-03 20:23:50,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867439930] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:50,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929178070] [2022-03-03 20:23:50,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:23:50,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:50,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:50,201 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:50,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-03 20:23:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:50,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:23:50,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:50,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:50,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:50,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:50,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929178070] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:50,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:50,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-03-03 20:23:50,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276774026] [2022-03-03 20:23:50,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:50,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:23:50,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:50,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:23:50,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:23:50,383 INFO L87 Difference]: Start difference. First operand 16022 states and 64129 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:51,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:51,446 INFO L93 Difference]: Finished difference Result 29125 states and 108582 transitions. [2022-03-03 20:23:51,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-03 20:23:51,446 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:23:51,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:51,521 INFO L225 Difference]: With dead ends: 29125 [2022-03-03 20:23:51,522 INFO L226 Difference]: Without dead ends: 29118 [2022-03-03 20:23:51,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1285, Invalid=4117, Unknown=0, NotChecked=0, Total=5402 [2022-03-03 20:23:51,522 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 392 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:51,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 296 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:23:51,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29118 states. [2022-03-03 20:23:51,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29118 to 16971. [2022-03-03 20:23:51,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16971 states, 16970 states have (on average 3.9985857395403652) internal successors, (67856), 16970 states have internal predecessors, (67856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:51,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16971 states to 16971 states and 67856 transitions. [2022-03-03 20:23:51,981 INFO L78 Accepts]: Start accepts. Automaton has 16971 states and 67856 transitions. Word has length 28 [2022-03-03 20:23:51,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:51,981 INFO L470 AbstractCegarLoop]: Abstraction has 16971 states and 67856 transitions. [2022-03-03 20:23:51,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:51,981 INFO L276 IsEmpty]: Start isEmpty. Operand 16971 states and 67856 transitions. [2022-03-03 20:23:52,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:52,009 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:52,009 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:52,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-03-03 20:23:52,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-03-03 20:23:52,209 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:52,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:52,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1238551230, now seen corresponding path program 98 times [2022-03-03 20:23:52,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:52,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11319555] [2022-03-03 20:23:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:52,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:52,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:52,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:52,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11319555] [2022-03-03 20:23:52,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11319555] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:52,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752403012] [2022-03-03 20:23:52,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:23:52,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:52,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:52,248 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:52,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-03 20:23:52,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:23:52,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:23:52,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:23:52,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:52,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:52,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752403012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:52,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:52,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 15 [2022-03-03 20:23:52,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929255642] [2022-03-03 20:23:52,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:52,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:23:52,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:52,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:23:52,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:23:52,428 INFO L87 Difference]: Start difference. First operand 16971 states and 67856 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:53,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:53,348 INFO L93 Difference]: Finished difference Result 28443 states and 106828 transitions. [2022-03-03 20:23:53,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-03 20:23:53,348 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:23:53,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:53,419 INFO L225 Difference]: With dead ends: 28443 [2022-03-03 20:23:53,419 INFO L226 Difference]: Without dead ends: 28443 [2022-03-03 20:23:53,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=752, Invalid=2554, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 20:23:53,419 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 360 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:53,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 296 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:23:53,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28443 states. [2022-03-03 20:23:53,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28443 to 17307. [2022-03-03 20:23:53,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17307 states, 17306 states have (on average 3.983011672252398) internal successors, (68930), 17306 states have internal predecessors, (68930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:53,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17307 states to 17307 states and 68930 transitions. [2022-03-03 20:23:53,833 INFO L78 Accepts]: Start accepts. Automaton has 17307 states and 68930 transitions. Word has length 28 [2022-03-03 20:23:53,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:53,833 INFO L470 AbstractCegarLoop]: Abstraction has 17307 states and 68930 transitions. [2022-03-03 20:23:53,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:53,833 INFO L276 IsEmpty]: Start isEmpty. Operand 17307 states and 68930 transitions. [2022-03-03 20:23:53,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:53,862 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:53,862 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:53,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-03-03 20:23:54,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-03-03 20:23:54,062 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:54,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:54,063 INFO L85 PathProgramCache]: Analyzing trace with hash 155528574, now seen corresponding path program 99 times [2022-03-03 20:23:54,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:54,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195396839] [2022-03-03 20:23:54,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:54,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:54,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:54,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195396839] [2022-03-03 20:23:54,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195396839] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:54,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092214640] [2022-03-03 20:23:54,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:23:54,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:54,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:54,095 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:54,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-03 20:23:54,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:23:54,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:23:54,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 20:23:54,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:54,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:54,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:54,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092214640] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:54,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:54,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:23:54,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995377349] [2022-03-03 20:23:54,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:54,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:23:54,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:54,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:23:54,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:23:54,253 INFO L87 Difference]: Start difference. First operand 17307 states and 68930 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:54,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:54,760 INFO L93 Difference]: Finished difference Result 23169 states and 87572 transitions. [2022-03-03 20:23:54,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 20:23:54,760 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:23:54,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:54,815 INFO L225 Difference]: With dead ends: 23169 [2022-03-03 20:23:54,815 INFO L226 Difference]: Without dead ends: 23129 [2022-03-03 20:23:54,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=376, Invalid=956, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 20:23:54,816 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 280 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:54,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 148 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:23:54,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23129 states. [2022-03-03 20:23:55,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23129 to 17987. [2022-03-03 20:23:55,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17987 states, 17986 states have (on average 3.9894362281774716) internal successors, (71754), 17986 states have internal predecessors, (71754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17987 states to 17987 states and 71754 transitions. [2022-03-03 20:23:55,298 INFO L78 Accepts]: Start accepts. Automaton has 17987 states and 71754 transitions. Word has length 28 [2022-03-03 20:23:55,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:55,298 INFO L470 AbstractCegarLoop]: Abstraction has 17987 states and 71754 transitions. [2022-03-03 20:23:55,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 17987 states and 71754 transitions. [2022-03-03 20:23:55,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:55,327 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:55,327 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:55,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-03-03 20:23:55,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-03-03 20:23:55,528 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:55,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:55,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1626606692, now seen corresponding path program 100 times [2022-03-03 20:23:55,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:55,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146394868] [2022-03-03 20:23:55,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:55,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:55,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:23:55,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:55,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146394868] [2022-03-03 20:23:55,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146394868] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:55,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920429269] [2022-03-03 20:23:55,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:23:55,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:55,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:55,560 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:55,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-03 20:23:55,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:23:55,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:23:55,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 20:23:55,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:23:55,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:23:55,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920429269] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:55,762 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:55,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 20:23:55,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576563155] [2022-03-03 20:23:55,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:55,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:23:55,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:55,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:23:55,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:23:55,763 INFO L87 Difference]: Start difference. First operand 17987 states and 71754 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:56,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:56,295 INFO L93 Difference]: Finished difference Result 23904 states and 89849 transitions. [2022-03-03 20:23:56,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 20:23:56,296 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:23:56,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:56,353 INFO L225 Difference]: With dead ends: 23904 [2022-03-03 20:23:56,353 INFO L226 Difference]: Without dead ends: 23904 [2022-03-03 20:23:56,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=376, Invalid=956, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 20:23:56,354 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 252 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:56,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 180 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:23:56,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23904 states. [2022-03-03 20:23:56,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23904 to 18105. [2022-03-03 20:23:56,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18105 states, 18104 states have (on average 3.985030932390632) internal successors, (72145), 18104 states have internal predecessors, (72145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:56,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18105 states to 18105 states and 72145 transitions. [2022-03-03 20:23:56,861 INFO L78 Accepts]: Start accepts. Automaton has 18105 states and 72145 transitions. Word has length 28 [2022-03-03 20:23:56,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:56,862 INFO L470 AbstractCegarLoop]: Abstraction has 18105 states and 72145 transitions. [2022-03-03 20:23:56,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:56,862 INFO L276 IsEmpty]: Start isEmpty. Operand 18105 states and 72145 transitions. [2022-03-03 20:23:56,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:56,890 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:56,890 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:56,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-03-03 20:23:57,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:57,091 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:57,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:57,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1193730088, now seen corresponding path program 101 times [2022-03-03 20:23:57,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:57,091 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368152818] [2022-03-03 20:23:57,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:57,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:23:57,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:57,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368152818] [2022-03-03 20:23:57,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368152818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:57,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565359426] [2022-03-03 20:23:57,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:23:57,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:57,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:57,133 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:57,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-03 20:23:57,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 20:23:57,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:23:57,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:23:57,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:23:57,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:23:57,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565359426] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:57,308 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:57,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 15 [2022-03-03 20:23:57,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784310975] [2022-03-03 20:23:57,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:57,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:23:57,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:57,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:23:57,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:23:57,309 INFO L87 Difference]: Start difference. First operand 18105 states and 72145 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:58,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:58,058 INFO L93 Difference]: Finished difference Result 28885 states and 109443 transitions. [2022-03-03 20:23:58,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 20:23:58,058 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:23:58,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:23:58,134 INFO L225 Difference]: With dead ends: 28885 [2022-03-03 20:23:58,134 INFO L226 Difference]: Without dead ends: 28881 [2022-03-03 20:23:58,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=656, Invalid=2100, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 20:23:58,135 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 436 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:23:58,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 279 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:23:58,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28881 states. [2022-03-03 20:23:58,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28881 to 17991. [2022-03-03 20:23:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17991 states, 17990 states have (on average 3.9883268482490273) internal successors, (71750), 17990 states have internal predecessors, (71750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:58,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17991 states to 17991 states and 71750 transitions. [2022-03-03 20:23:58,743 INFO L78 Accepts]: Start accepts. Automaton has 17991 states and 71750 transitions. Word has length 28 [2022-03-03 20:23:58,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:23:58,743 INFO L470 AbstractCegarLoop]: Abstraction has 17991 states and 71750 transitions. [2022-03-03 20:23:58,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:58,743 INFO L276 IsEmpty]: Start isEmpty. Operand 17991 states and 71750 transitions. [2022-03-03 20:23:58,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:23:58,774 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:23:58,774 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:23:58,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-03-03 20:23:58,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:58,975 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:23:58,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:23:58,975 INFO L85 PathProgramCache]: Analyzing trace with hash 297909272, now seen corresponding path program 102 times [2022-03-03 20:23:58,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:23:58,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250325129] [2022-03-03 20:23:58,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:23:58,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:23:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:23:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:59,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:23:59,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250325129] [2022-03-03 20:23:59,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250325129] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:23:59,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534791147] [2022-03-03 20:23:59,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:23:59,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:23:59,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:23:59,022 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:23:59,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-03 20:23:59,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:23:59,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:23:59,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 20:23:59,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:23:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:59,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:23:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:23:59,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534791147] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:23:59,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:23:59,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-03 20:23:59,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788636626] [2022-03-03 20:23:59,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:23:59,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:23:59,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:23:59,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:23:59,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:23:59,195 INFO L87 Difference]: Start difference. First operand 17991 states and 71750 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:23:59,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:23:59,855 INFO L93 Difference]: Finished difference Result 25132 states and 94101 transitions. [2022-03-03 20:23:59,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 20:23:59,855 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:23:59,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:24:00,051 INFO L225 Difference]: With dead ends: 25132 [2022-03-03 20:24:00,052 INFO L226 Difference]: Without dead ends: 25132 [2022-03-03 20:24:00,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=516, Invalid=1290, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 20:24:00,052 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 273 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:24:00,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 218 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:24:00,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25132 states. [2022-03-03 20:24:00,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25132 to 18194. [2022-03-03 20:24:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18194 states, 18193 states have (on average 3.9836200736547025) internal successors, (72474), 18193 states have internal predecessors, (72474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:00,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18194 states to 18194 states and 72474 transitions. [2022-03-03 20:24:00,547 INFO L78 Accepts]: Start accepts. Automaton has 18194 states and 72474 transitions. Word has length 28 [2022-03-03 20:24:00,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:24:00,547 INFO L470 AbstractCegarLoop]: Abstraction has 18194 states and 72474 transitions. [2022-03-03 20:24:00,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:00,548 INFO L276 IsEmpty]: Start isEmpty. Operand 18194 states and 72474 transitions. [2022-03-03 20:24:00,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:24:00,576 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:24:00,576 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:24:00,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-03-03 20:24:00,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-03-03 20:24:00,776 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:24:00,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:24:00,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1791066746, now seen corresponding path program 103 times [2022-03-03 20:24:00,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:24:00,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039080428] [2022-03-03 20:24:00,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:24:00,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:24:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:00,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:24:00,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039080428] [2022-03-03 20:24:00,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039080428] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:24:00,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073429918] [2022-03-03 20:24:00,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:24:00,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:00,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:24:00,820 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:24:00,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-03-03 20:24:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:00,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:24:00,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:24:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:00,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:24:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:00,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073429918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:24:00,998 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:24:00,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-03-03 20:24:00,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139839415] [2022-03-03 20:24:00,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:24:00,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 20:24:00,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:24:00,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 20:24:00,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-03 20:24:00,998 INFO L87 Difference]: Start difference. First operand 18194 states and 72474 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:01,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:24:01,819 INFO L93 Difference]: Finished difference Result 29102 states and 110153 transitions. [2022-03-03 20:24:01,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 20:24:01,820 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:24:01,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:24:01,898 INFO L225 Difference]: With dead ends: 29102 [2022-03-03 20:24:01,898 INFO L226 Difference]: Without dead ends: 29090 [2022-03-03 20:24:01,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=755, Invalid=2551, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 20:24:01,899 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 435 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:24:01,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 283 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:24:01,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29090 states. [2022-03-03 20:24:02,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29090 to 18222. [2022-03-03 20:24:02,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18222 states, 18221 states have (on average 3.981120684923989) internal successors, (72540), 18221 states have internal predecessors, (72540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18222 states to 18222 states and 72540 transitions. [2022-03-03 20:24:02,472 INFO L78 Accepts]: Start accepts. Automaton has 18222 states and 72540 transitions. Word has length 28 [2022-03-03 20:24:02,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:24:02,473 INFO L470 AbstractCegarLoop]: Abstraction has 18222 states and 72540 transitions. [2022-03-03 20:24:02,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:02,473 INFO L276 IsEmpty]: Start isEmpty. Operand 18222 states and 72540 transitions. [2022-03-03 20:24:02,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:24:02,502 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:24:02,502 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:24:02,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-03-03 20:24:02,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:02,702 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:24:02,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:24:02,703 INFO L85 PathProgramCache]: Analyzing trace with hash 22785830, now seen corresponding path program 104 times [2022-03-03 20:24:02,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:24:02,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960494795] [2022-03-03 20:24:02,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:24:02,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:24:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:02,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:24:02,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960494795] [2022-03-03 20:24:02,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960494795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:24:02,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625924952] [2022-03-03 20:24:02,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:24:02,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:02,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:24:02,747 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:24:02,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-03-03 20:24:02,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:24:02,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:24:02,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:24:02,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:24:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:02,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:24:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:03,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625924952] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:24:03,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:24:03,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-03-03 20:24:03,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179991461] [2022-03-03 20:24:03,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:24:03,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 20:24:03,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:24:03,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 20:24:03,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-03-03 20:24:03,059 INFO L87 Difference]: Start difference. First operand 18222 states and 72540 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:04,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:24:04,714 INFO L93 Difference]: Finished difference Result 40859 states and 152607 transitions. [2022-03-03 20:24:04,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-03 20:24:04,714 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:24:04,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:24:04,842 INFO L225 Difference]: With dead ends: 40859 [2022-03-03 20:24:04,842 INFO L226 Difference]: Without dead ends: 40859 [2022-03-03 20:24:04,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3597 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2043, Invalid=7463, Unknown=0, NotChecked=0, Total=9506 [2022-03-03 20:24:04,844 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 502 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:24:04,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 383 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:24:04,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40859 states. [2022-03-03 20:24:05,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40859 to 24537. [2022-03-03 20:24:05,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24537 states, 24536 states have (on average 4.01450929246821) internal successors, (98500), 24536 states have internal predecessors, (98500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:05,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24537 states to 24537 states and 98500 transitions. [2022-03-03 20:24:05,860 INFO L78 Accepts]: Start accepts. Automaton has 24537 states and 98500 transitions. Word has length 28 [2022-03-03 20:24:05,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:24:05,860 INFO L470 AbstractCegarLoop]: Abstraction has 24537 states and 98500 transitions. [2022-03-03 20:24:05,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:05,860 INFO L276 IsEmpty]: Start isEmpty. Operand 24537 states and 98500 transitions. [2022-03-03 20:24:05,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:24:05,900 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:24:05,900 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:24:05,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-03-03 20:24:06,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:06,100 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:24:06,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:24:06,101 INFO L85 PathProgramCache]: Analyzing trace with hash 104161918, now seen corresponding path program 105 times [2022-03-03 20:24:06,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:24:06,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755021542] [2022-03-03 20:24:06,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:24:06,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:24:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:06,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:24:06,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755021542] [2022-03-03 20:24:06,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755021542] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:24:06,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892896900] [2022-03-03 20:24:06,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:24:06,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:06,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:24:06,144 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:24:06,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-03-03 20:24:06,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 20:24:06,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:24:06,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:24:06,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:24:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:06,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:24:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:06,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892896900] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:24:06,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:24:06,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-03-03 20:24:06,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200062207] [2022-03-03 20:24:06,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:24:06,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 20:24:06,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:24:06,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 20:24:06,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-03-03 20:24:06,450 INFO L87 Difference]: Start difference. First operand 24537 states and 98500 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:07,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:24:07,867 INFO L93 Difference]: Finished difference Result 39804 states and 149837 transitions. [2022-03-03 20:24:07,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-03 20:24:07,868 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:24:07,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:24:07,990 INFO L225 Difference]: With dead ends: 39804 [2022-03-03 20:24:07,990 INFO L226 Difference]: Without dead ends: 39784 [2022-03-03 20:24:07,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2821 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1761, Invalid=6071, Unknown=0, NotChecked=0, Total=7832 [2022-03-03 20:24:07,991 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 569 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:24:07,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 329 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:24:08,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39784 states. [2022-03-03 20:24:08,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39784 to 24329. [2022-03-03 20:24:08,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24329 states, 24328 states have (on average 4.017592897073331) internal successors, (97740), 24328 states have internal predecessors, (97740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:08,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24329 states to 24329 states and 97740 transitions. [2022-03-03 20:24:08,880 INFO L78 Accepts]: Start accepts. Automaton has 24329 states and 97740 transitions. Word has length 28 [2022-03-03 20:24:08,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:24:08,880 INFO L470 AbstractCegarLoop]: Abstraction has 24329 states and 97740 transitions. [2022-03-03 20:24:08,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:08,880 INFO L276 IsEmpty]: Start isEmpty. Operand 24329 states and 97740 transitions. [2022-03-03 20:24:08,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:24:08,922 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:24:08,922 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:24:08,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-03-03 20:24:09,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2022-03-03 20:24:09,123 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:24:09,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:24:09,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1410930054, now seen corresponding path program 106 times [2022-03-03 20:24:09,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:24:09,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342531706] [2022-03-03 20:24:09,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:24:09,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:24:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:09,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:24:09,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342531706] [2022-03-03 20:24:09,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342531706] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:24:09,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333169018] [2022-03-03 20:24:09,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:24:09,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:09,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:24:09,168 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:24:09,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-03-03 20:24:09,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:24:09,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:24:09,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:24:09,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:24:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:09,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:24:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:09,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333169018] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:24:09,374 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:24:09,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-03-03 20:24:09,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246276300] [2022-03-03 20:24:09,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:24:09,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 20:24:09,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:24:09,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 20:24:09,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-03-03 20:24:09,374 INFO L87 Difference]: Start difference. First operand 24329 states and 97740 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:11,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:24:11,412 INFO L93 Difference]: Finished difference Result 41258 states and 153613 transitions. [2022-03-03 20:24:11,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-03 20:24:11,412 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:24:11,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:24:11,537 INFO L225 Difference]: With dead ends: 41258 [2022-03-03 20:24:11,537 INFO L226 Difference]: Without dead ends: 41222 [2022-03-03 20:24:11,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5102 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2733, Invalid=10377, Unknown=0, NotChecked=0, Total=13110 [2022-03-03 20:24:11,538 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 785 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:24:11,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 392 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:24:11,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41222 states. [2022-03-03 20:24:12,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41222 to 24421. [2022-03-03 20:24:12,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24421 states, 24420 states have (on average 4.016052416052416) internal successors, (98072), 24420 states have internal predecessors, (98072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:12,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24421 states to 24421 states and 98072 transitions. [2022-03-03 20:24:12,451 INFO L78 Accepts]: Start accepts. Automaton has 24421 states and 98072 transitions. Word has length 28 [2022-03-03 20:24:12,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:24:12,451 INFO L470 AbstractCegarLoop]: Abstraction has 24421 states and 98072 transitions. [2022-03-03 20:24:12,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:12,451 INFO L276 IsEmpty]: Start isEmpty. Operand 24421 states and 98072 transitions. [2022-03-03 20:24:12,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:24:12,488 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:24:12,488 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:24:12,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-03-03 20:24:12,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:12,689 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:24:12,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:24:12,689 INFO L85 PathProgramCache]: Analyzing trace with hash 186196662, now seen corresponding path program 107 times [2022-03-03 20:24:12,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:24:12,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721215384] [2022-03-03 20:24:12,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:24:12,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:24:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:12,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:24:12,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721215384] [2022-03-03 20:24:12,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721215384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:24:12,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539163490] [2022-03-03 20:24:12,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:24:12,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:12,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:24:12,735 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:24:12,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-03-03 20:24:12,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 20:24:12,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:24:12,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:24:12,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:24:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:12,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:24:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:13,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539163490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:24:13,122 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:24:13,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-03-03 20:24:13,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801113509] [2022-03-03 20:24:13,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:24:13,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 20:24:13,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:24:13,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 20:24:13,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-03-03 20:24:13,122 INFO L87 Difference]: Start difference. First operand 24421 states and 98072 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:15,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:24:15,994 INFO L93 Difference]: Finished difference Result 37698 states and 140323 transitions. [2022-03-03 20:24:15,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-03-03 20:24:15,994 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:24:15,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:24:16,089 INFO L225 Difference]: With dead ends: 37698 [2022-03-03 20:24:16,090 INFO L226 Difference]: Without dead ends: 37692 [2022-03-03 20:24:16,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11444 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5430, Invalid=21302, Unknown=0, NotChecked=0, Total=26732 [2022-03-03 20:24:16,091 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 916 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:24:16,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [916 Valid, 583 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1648 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 20:24:16,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37692 states. [2022-03-03 20:24:16,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37692 to 24659. [2022-03-03 20:24:16,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24659 states, 24658 states have (on average 4.009205937221186) internal successors, (98859), 24658 states have internal predecessors, (98859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:16,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24659 states to 24659 states and 98859 transitions. [2022-03-03 20:24:16,940 INFO L78 Accepts]: Start accepts. Automaton has 24659 states and 98859 transitions. Word has length 28 [2022-03-03 20:24:16,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:24:16,940 INFO L470 AbstractCegarLoop]: Abstraction has 24659 states and 98859 transitions. [2022-03-03 20:24:16,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:16,940 INFO L276 IsEmpty]: Start isEmpty. Operand 24659 states and 98859 transitions. [2022-03-03 20:24:16,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:24:16,982 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:24:16,982 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:24:16,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-03-03 20:24:17,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:17,183 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:24:17,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:24:17,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1829235816, now seen corresponding path program 108 times [2022-03-03 20:24:17,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:24:17,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891997150] [2022-03-03 20:24:17,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:24:17,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:24:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:17,227 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:24:17,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891997150] [2022-03-03 20:24:17,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891997150] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:24:17,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143930532] [2022-03-03 20:24:17,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:24:17,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:17,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:24:17,228 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:24:17,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-03-03 20:24:17,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 20:24:17,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:24:17,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:24:17,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:24:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:17,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:24:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:17,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143930532] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:24:17,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:24:17,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-03-03 20:24:17,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375671824] [2022-03-03 20:24:17,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:24:17,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 20:24:17,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:24:17,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 20:24:17,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-03-03 20:24:17,479 INFO L87 Difference]: Start difference. First operand 24659 states and 98859 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:21,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:24:21,143 INFO L93 Difference]: Finished difference Result 38359 states and 144218 transitions. [2022-03-03 20:24:21,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-03-03 20:24:21,144 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:24:21,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:24:21,251 INFO L225 Difference]: With dead ends: 38359 [2022-03-03 20:24:21,252 INFO L226 Difference]: Without dead ends: 38339 [2022-03-03 20:24:21,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16403 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7365, Invalid=32037, Unknown=0, NotChecked=0, Total=39402 [2022-03-03 20:24:21,253 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1089 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1089 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:24:21,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1089 Valid, 495 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1522 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:24:21,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38339 states. [2022-03-03 20:24:21,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38339 to 24396. [2022-03-03 20:24:21,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24396 states, 24395 states have (on average 4.013855298216848) internal successors, (97918), 24395 states have internal predecessors, (97918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:22,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24396 states to 24396 states and 97918 transitions. [2022-03-03 20:24:22,127 INFO L78 Accepts]: Start accepts. Automaton has 24396 states and 97918 transitions. Word has length 28 [2022-03-03 20:24:22,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:24:22,127 INFO L470 AbstractCegarLoop]: Abstraction has 24396 states and 97918 transitions. [2022-03-03 20:24:22,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:22,127 INFO L276 IsEmpty]: Start isEmpty. Operand 24396 states and 97918 transitions. [2022-03-03 20:24:22,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:24:22,169 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:24:22,169 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:24:22,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-03-03 20:24:22,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:22,370 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:24:22,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:24:22,370 INFO L85 PathProgramCache]: Analyzing trace with hash 561778638, now seen corresponding path program 109 times [2022-03-03 20:24:22,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:24:22,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276160426] [2022-03-03 20:24:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:24:22,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:24:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:22,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:24:22,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276160426] [2022-03-03 20:24:22,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276160426] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:24:22,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239294657] [2022-03-03 20:24:22,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:24:22,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:22,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:24:22,427 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:24:22,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-03-03 20:24:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:22,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:24:22,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:24:22,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:22,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:24:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:22,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239294657] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:24:22,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:24:22,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 20 [2022-03-03 20:24:22,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728470617] [2022-03-03 20:24:22,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:24:22,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 20:24:22,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:24:22,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 20:24:22,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-03-03 20:24:22,653 INFO L87 Difference]: Start difference. First operand 24396 states and 97918 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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) [2022-03-03 20:24:25,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:24:25,535 INFO L93 Difference]: Finished difference Result 37169 states and 140623 transitions. [2022-03-03 20:24:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-03-03 20:24:25,536 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 28 [2022-03-03 20:24:25,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:24:25,637 INFO L225 Difference]: With dead ends: 37169 [2022-03-03 20:24:25,637 INFO L226 Difference]: Without dead ends: 37133 [2022-03-03 20:24:25,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10541 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4928, Invalid=21478, Unknown=0, NotChecked=0, Total=26406 [2022-03-03 20:24:25,639 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 722 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:24:25,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [722 Valid, 464 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 20:24:25,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37133 states. [2022-03-03 20:24:26,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37133 to 24412. [2022-03-03 20:24:26,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24412 states, 24411 states have (on average 4.012412437016099) internal successors, (97947), 24411 states have internal predecessors, (97947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:26,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24412 states to 24412 states and 97947 transitions. [2022-03-03 20:24:26,501 INFO L78 Accepts]: Start accepts. Automaton has 24412 states and 97947 transitions. Word has length 28 [2022-03-03 20:24:26,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:24:26,501 INFO L470 AbstractCegarLoop]: Abstraction has 24412 states and 97947 transitions. [2022-03-03 20:24:26,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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) [2022-03-03 20:24:26,502 INFO L276 IsEmpty]: Start isEmpty. Operand 24412 states and 97947 transitions. [2022-03-03 20:24:26,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:24:26,537 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:24:26,537 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:24:26,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-03-03 20:24:26,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-03-03 20:24:26,738 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:24:26,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:24:26,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2037892514, now seen corresponding path program 110 times [2022-03-03 20:24:26,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:24:26,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492143707] [2022-03-03 20:24:26,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:24:26,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:24:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:24:26,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:24:26,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492143707] [2022-03-03 20:24:26,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492143707] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:24:26,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165095589] [2022-03-03 20:24:26,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:24:26,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:26,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:24:26,777 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:24:26,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-03-03 20:24:26,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:24:26,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:24:26,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:24:26,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:24:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:26,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:24:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 20:24:27,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165095589] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:24:27,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:24:27,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 20 [2022-03-03 20:24:27,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855878253] [2022-03-03 20:24:27,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:24:27,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 20:24:27,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:24:27,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 20:24:27,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-03-03 20:24:27,020 INFO L87 Difference]: Start difference. First operand 24412 states and 97947 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:29,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:24:29,484 INFO L93 Difference]: Finished difference Result 56538 states and 210546 transitions. [2022-03-03 20:24:29,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-03 20:24:29,484 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:24:29,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:24:29,662 INFO L225 Difference]: With dead ends: 56538 [2022-03-03 20:24:29,663 INFO L226 Difference]: Without dead ends: 56538 [2022-03-03 20:24:29,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8271 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3926, Invalid=14980, Unknown=0, NotChecked=0, Total=18906 [2022-03-03 20:24:29,664 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 596 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:24:29,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 535 Invalid, 1931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1848 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 20:24:29,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56538 states. [2022-03-03 20:24:30,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56538 to 25144. [2022-03-03 20:24:30,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25144 states, 25143 states have (on average 4.031579366026329) internal successors, (101366), 25143 states have internal predecessors, (101366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:30,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25144 states to 25144 states and 101366 transitions. [2022-03-03 20:24:30,875 INFO L78 Accepts]: Start accepts. Automaton has 25144 states and 101366 transitions. Word has length 28 [2022-03-03 20:24:30,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:24:30,875 INFO L470 AbstractCegarLoop]: Abstraction has 25144 states and 101366 transitions. [2022-03-03 20:24:30,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:30,876 INFO L276 IsEmpty]: Start isEmpty. Operand 25144 states and 101366 transitions. [2022-03-03 20:24:30,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:24:30,914 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:24:30,914 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:24:30,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-03-03 20:24:31,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:31,114 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:24:31,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:24:31,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1690122702, now seen corresponding path program 111 times [2022-03-03 20:24:31,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:24:31,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089993417] [2022-03-03 20:24:31,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:24:31,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:24:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:24:31,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:24:31,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089993417] [2022-03-03 20:24:31,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089993417] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:24:31,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839218394] [2022-03-03 20:24:31,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:24:31,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:31,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:24:31,154 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:24:31,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-03-03 20:24:31,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:24:31,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:24:31,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:24:31,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:24:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:31,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:24:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 20:24:31,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839218394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:24:31,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:24:31,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 20 [2022-03-03 20:24:31,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689929221] [2022-03-03 20:24:31,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:24:31,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 20:24:31,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:24:31,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 20:24:31,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-03-03 20:24:31,396 INFO L87 Difference]: Start difference. First operand 25144 states and 101366 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:34,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:24:34,192 INFO L93 Difference]: Finished difference Result 60505 states and 225242 transitions. [2022-03-03 20:24:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-03-03 20:24:34,193 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:24:34,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:24:34,377 INFO L225 Difference]: With dead ends: 60505 [2022-03-03 20:24:34,378 INFO L226 Difference]: Without dead ends: 60505 [2022-03-03 20:24:34,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11105 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4654, Invalid=20468, Unknown=0, NotChecked=0, Total=25122 [2022-03-03 20:24:34,379 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 737 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:24:34,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 517 Invalid, 1727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1611 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 20:24:34,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60505 states. [2022-03-03 20:24:35,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60505 to 25015. [2022-03-03 20:24:35,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25015 states, 25014 states have (on average 4.025185895898297) internal successors, (100686), 25014 states have internal predecessors, (100686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:35,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25015 states to 25015 states and 100686 transitions. [2022-03-03 20:24:35,528 INFO L78 Accepts]: Start accepts. Automaton has 25015 states and 100686 transitions. Word has length 28 [2022-03-03 20:24:35,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:24:35,528 INFO L470 AbstractCegarLoop]: Abstraction has 25015 states and 100686 transitions. [2022-03-03 20:24:35,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:35,528 INFO L276 IsEmpty]: Start isEmpty. Operand 25015 states and 100686 transitions. [2022-03-03 20:24:35,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:24:35,694 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:24:35,694 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:24:35,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-03-03 20:24:35,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:35,898 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:24:35,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:24:35,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1076134064, now seen corresponding path program 112 times [2022-03-03 20:24:35,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:24:35,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452380541] [2022-03-03 20:24:35,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:24:35,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:24:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:35,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:24:35,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452380541] [2022-03-03 20:24:35,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452380541] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:24:35,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308541516] [2022-03-03 20:24:35,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:24:35,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:35,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:24:35,942 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:24:35,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-03-03 20:24:35,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:24:35,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:24:35,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:24:35,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:24:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:36,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:24:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:36,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308541516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:24:36,165 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:24:36,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-03-03 20:24:36,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881238482] [2022-03-03 20:24:36,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:24:36,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 20:24:36,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:24:36,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 20:24:36,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-03-03 20:24:36,166 INFO L87 Difference]: Start difference. First operand 25015 states and 100686 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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) [2022-03-03 20:24:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:24:38,582 INFO L93 Difference]: Finished difference Result 38522 states and 145188 transitions. [2022-03-03 20:24:38,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-03-03 20:24:38,583 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 28 [2022-03-03 20:24:38,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:24:38,697 INFO L225 Difference]: With dead ends: 38522 [2022-03-03 20:24:38,697 INFO L226 Difference]: Without dead ends: 38522 [2022-03-03 20:24:38,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7691 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3454, Invalid=15178, Unknown=0, NotChecked=0, Total=18632 [2022-03-03 20:24:38,699 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 628 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:24:38,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 525 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1582 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 20:24:38,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38522 states. [2022-03-03 20:24:39,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38522 to 25352. [2022-03-03 20:24:39,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25352 states, 25351 states have (on average 4.021103703995897) internal successors, (101939), 25351 states have internal predecessors, (101939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:39,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25352 states to 25352 states and 101939 transitions. [2022-03-03 20:24:39,563 INFO L78 Accepts]: Start accepts. Automaton has 25352 states and 101939 transitions. Word has length 28 [2022-03-03 20:24:39,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:24:39,563 INFO L470 AbstractCegarLoop]: Abstraction has 25352 states and 101939 transitions. [2022-03-03 20:24:39,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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) [2022-03-03 20:24:39,563 INFO L276 IsEmpty]: Start isEmpty. Operand 25352 states and 101939 transitions. [2022-03-03 20:24:39,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:24:39,602 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:24:39,602 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:24:39,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-03-03 20:24:39,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-03-03 20:24:39,803 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:24:39,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:24:39,803 INFO L85 PathProgramCache]: Analyzing trace with hash 77566098, now seen corresponding path program 113 times [2022-03-03 20:24:39,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:24:39,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296023116] [2022-03-03 20:24:39,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:24:39,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:24:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:39,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:24:39,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296023116] [2022-03-03 20:24:39,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296023116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:24:39,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379771756] [2022-03-03 20:24:39,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:24:39,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:39,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:24:39,841 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:24:39,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-03-03 20:24:39,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 20:24:39,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:24:39,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:24:39,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:24:39,959 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:39,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:24:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:40,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379771756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:24:40,062 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:24:40,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-03 20:24:40,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321308119] [2022-03-03 20:24:40,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:24:40,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 20:24:40,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:24:40,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 20:24:40,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-03-03 20:24:40,062 INFO L87 Difference]: Start difference. First operand 25352 states and 101939 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:41,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:24:41,850 INFO L93 Difference]: Finished difference Result 36885 states and 140699 transitions. [2022-03-03 20:24:41,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-03 20:24:41,850 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:24:41,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:24:42,090 INFO L225 Difference]: With dead ends: 36885 [2022-03-03 20:24:42,090 INFO L226 Difference]: Without dead ends: 36881 [2022-03-03 20:24:42,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4699 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2523, Invalid=9467, Unknown=0, NotChecked=0, Total=11990 [2022-03-03 20:24:42,091 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 560 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:24:42,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 457 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:24:42,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36881 states. [2022-03-03 20:24:42,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36881 to 25310. [2022-03-03 20:24:42,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25310 states, 25309 states have (on average 4.022205539531392) internal successors, (101798), 25309 states have internal predecessors, (101798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:42,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25310 states to 25310 states and 101798 transitions. [2022-03-03 20:24:42,897 INFO L78 Accepts]: Start accepts. Automaton has 25310 states and 101798 transitions. Word has length 28 [2022-03-03 20:24:42,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:24:42,898 INFO L470 AbstractCegarLoop]: Abstraction has 25310 states and 101798 transitions. [2022-03-03 20:24:42,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:42,898 INFO L276 IsEmpty]: Start isEmpty. Operand 25310 states and 101798 transitions. [2022-03-03 20:24:42,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:24:42,945 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:24:42,945 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:24:42,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2022-03-03 20:24:43,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:43,145 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:24:43,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:24:43,146 INFO L85 PathProgramCache]: Analyzing trace with hash -2038513552, now seen corresponding path program 114 times [2022-03-03 20:24:43,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:24:43,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440819855] [2022-03-03 20:24:43,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:24:43,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:24:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:43,187 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:24:43,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440819855] [2022-03-03 20:24:43,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440819855] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:24:43,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836239295] [2022-03-03 20:24:43,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:24:43,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:43,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:24:43,188 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:24:43,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-03-03 20:24:43,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 20:24:43,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:24:43,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:24:43,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:24:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:43,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:24:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:43,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836239295] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:24:43,400 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:24:43,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-03-03 20:24:43,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289413608] [2022-03-03 20:24:43,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:24:43,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 20:24:43,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:24:43,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 20:24:43,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-03-03 20:24:43,401 INFO L87 Difference]: Start difference. First operand 25310 states and 101798 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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) [2022-03-03 20:24:45,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:24:45,286 INFO L93 Difference]: Finished difference Result 37105 states and 141231 transitions. [2022-03-03 20:24:45,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-03 20:24:45,286 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 28 [2022-03-03 20:24:45,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:24:45,386 INFO L225 Difference]: With dead ends: 37105 [2022-03-03 20:24:45,386 INFO L226 Difference]: Without dead ends: 37093 [2022-03-03 20:24:45,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5383 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2694, Invalid=11112, Unknown=0, NotChecked=0, Total=13806 [2022-03-03 20:24:45,387 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 651 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:24:45,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 503 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:24:45,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37093 states. [2022-03-03 20:24:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37093 to 25416. [2022-03-03 20:24:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25416 states, 25415 states have (on average 4.018768443832382) internal successors, (102137), 25415 states have internal predecessors, (102137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:46,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25416 states to 25416 states and 102137 transitions. [2022-03-03 20:24:46,246 INFO L78 Accepts]: Start accepts. Automaton has 25416 states and 102137 transitions. Word has length 28 [2022-03-03 20:24:46,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:24:46,247 INFO L470 AbstractCegarLoop]: Abstraction has 25416 states and 102137 transitions. [2022-03-03 20:24:46,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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) [2022-03-03 20:24:46,247 INFO L276 IsEmpty]: Start isEmpty. Operand 25416 states and 102137 transitions. [2022-03-03 20:24:46,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:24:46,287 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:24:46,287 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:24:46,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-03-03 20:24:46,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:46,487 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:24:46,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:24:46,488 INFO L85 PathProgramCache]: Analyzing trace with hash 2061380766, now seen corresponding path program 70 times [2022-03-03 20:24:46,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:24:46,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604668980] [2022-03-03 20:24:46,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:24:46,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:24:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:46,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:24:46,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604668980] [2022-03-03 20:24:46,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604668980] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:24:46,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850306570] [2022-03-03 20:24:46,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:24:46,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:46,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:24:46,530 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:24:46,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-03-03 20:24:46,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:24:46,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:24:46,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:24:46,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:24:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:46,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:24:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:46,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850306570] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:24:46,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:24:46,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-03-03 20:24:46,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524055137] [2022-03-03 20:24:46,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:24:46,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:24:46,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:24:46,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:24:46,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:24:46,691 INFO L87 Difference]: Start difference. First operand 25416 states and 102137 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:47,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:24:47,615 INFO L93 Difference]: Finished difference Result 37614 states and 145573 transitions. [2022-03-03 20:24:47,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 20:24:47,615 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:24:47,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:24:47,722 INFO L225 Difference]: With dead ends: 37614 [2022-03-03 20:24:47,722 INFO L226 Difference]: Without dead ends: 37614 [2022-03-03 20:24:47,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=664, Invalid=2092, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 20:24:47,722 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 266 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:24:47,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 237 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:24:47,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37614 states. [2022-03-03 20:24:48,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37614 to 25510. [2022-03-03 20:24:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25510 states, 25509 states have (on average 4.016856795640754) internal successors, (102466), 25509 states have internal predecessors, (102466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:48,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25510 states to 25510 states and 102466 transitions. [2022-03-03 20:24:48,509 INFO L78 Accepts]: Start accepts. Automaton has 25510 states and 102466 transitions. Word has length 28 [2022-03-03 20:24:48,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:24:48,510 INFO L470 AbstractCegarLoop]: Abstraction has 25510 states and 102466 transitions. [2022-03-03 20:24:48,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:48,510 INFO L276 IsEmpty]: Start isEmpty. Operand 25510 states and 102466 transitions. [2022-03-03 20:24:48,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:24:48,549 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:24:48,549 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:24:48,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-03-03 20:24:48,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:48,749 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:24:48,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:24:48,749 INFO L85 PathProgramCache]: Analyzing trace with hash 290874174, now seen corresponding path program 71 times [2022-03-03 20:24:48,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:24:48,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320721694] [2022-03-03 20:24:48,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:24:48,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:24:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:48,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:24:48,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320721694] [2022-03-03 20:24:48,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320721694] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:24:48,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875961039] [2022-03-03 20:24:48,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:24:48,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:48,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:24:48,787 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:24:48,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-03-03 20:24:48,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 20:24:48,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:24:48,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:24:48,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:24:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:48,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:24:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:48,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875961039] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:24:48,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:24:48,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-03 20:24:48,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891808089] [2022-03-03 20:24:48,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:24:48,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:24:48,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:24:48,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:24:48,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:24:48,948 INFO L87 Difference]: Start difference. First operand 25510 states and 102466 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:49,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:24:49,947 INFO L93 Difference]: Finished difference Result 38267 states and 147665 transitions. [2022-03-03 20:24:49,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-03 20:24:49,947 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:24:49,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:24:50,053 INFO L225 Difference]: With dead ends: 38267 [2022-03-03 20:24:50,053 INFO L226 Difference]: Without dead ends: 38267 [2022-03-03 20:24:50,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=869, Invalid=3421, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 20:24:50,053 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 330 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:24:50,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 198 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:24:50,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38267 states. [2022-03-03 20:24:50,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38267 to 25874. [2022-03-03 20:24:50,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25874 states, 25873 states have (on average 4.005488346925366) internal successors, (103634), 25873 states have internal predecessors, (103634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25874 states to 25874 states and 103634 transitions. [2022-03-03 20:24:50,969 INFO L78 Accepts]: Start accepts. Automaton has 25874 states and 103634 transitions. Word has length 28 [2022-03-03 20:24:50,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:24:50,969 INFO L470 AbstractCegarLoop]: Abstraction has 25874 states and 103634 transitions. [2022-03-03 20:24:50,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:50,969 INFO L276 IsEmpty]: Start isEmpty. Operand 25874 states and 103634 transitions. [2022-03-03 20:24:51,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:24:51,017 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:24:51,017 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:24:51,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-03-03 20:24:51,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:51,218 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:24:51,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:24:51,218 INFO L85 PathProgramCache]: Analyzing trace with hash -792148482, now seen corresponding path program 72 times [2022-03-03 20:24:51,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:24:51,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648415334] [2022-03-03 20:24:51,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:24:51,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:24:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:51,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:24:51,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648415334] [2022-03-03 20:24:51,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648415334] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:24:51,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430900693] [2022-03-03 20:24:51,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:24:51,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:51,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:24:51,257 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:24:51,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-03-03 20:24:51,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:24:51,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:24:51,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:24:51,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:24:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:51,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:24:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:24:51,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430900693] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:24:51,570 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:24:51,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2022-03-03 20:24:51,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178139026] [2022-03-03 20:24:51,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:24:51,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:24:51,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:24:51,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:24:51,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:24:51,570 INFO L87 Difference]: Start difference. First operand 25874 states and 103634 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 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) [2022-03-03 20:24:52,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:24:52,191 INFO L93 Difference]: Finished difference Result 34529 states and 136320 transitions. [2022-03-03 20:24:52,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 20:24:52,192 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 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 28 [2022-03-03 20:24:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:24:52,289 INFO L225 Difference]: With dead ends: 34529 [2022-03-03 20:24:52,289 INFO L226 Difference]: Without dead ends: 34466 [2022-03-03 20:24:52,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=392, Invalid=1168, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 20:24:52,290 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 207 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:24:52,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 233 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:24:52,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34466 states. [2022-03-03 20:24:52,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34466 to 30827. [2022-03-03 20:24:53,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30827 states, 30826 states have (on average 4.036397845974178) internal successors, (124426), 30826 states have internal predecessors, (124426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:53,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30827 states to 30827 states and 124426 transitions. [2022-03-03 20:24:53,252 INFO L78 Accepts]: Start accepts. Automaton has 30827 states and 124426 transitions. Word has length 28 [2022-03-03 20:24:53,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:24:53,252 INFO L470 AbstractCegarLoop]: Abstraction has 30827 states and 124426 transitions. [2022-03-03 20:24:53,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 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) [2022-03-03 20:24:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 30827 states and 124426 transitions. [2022-03-03 20:24:53,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:24:53,325 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:24:53,325 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:24:53,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-03-03 20:24:53,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:53,526 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:24:53,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:24:53,526 INFO L85 PathProgramCache]: Analyzing trace with hash 246053032, now seen corresponding path program 73 times [2022-03-03 20:24:53,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:24:53,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360277953] [2022-03-03 20:24:53,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:24:53,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:24:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:24:53,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:24:53,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360277953] [2022-03-03 20:24:53,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360277953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:24:53,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784886442] [2022-03-03 20:24:53,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:24:53,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:53,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:24:53,565 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:24:53,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-03-03 20:24:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:53,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:24:53,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:24:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:24:53,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:24:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:24:53,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784886442] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:24:53,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:24:53,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-03 20:24:53,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005302571] [2022-03-03 20:24:53,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:24:53,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 20:24:53,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:24:53,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 20:24:53,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-03 20:24:53,725 INFO L87 Difference]: Start difference. First operand 30827 states and 124426 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:54,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:24:54,458 INFO L93 Difference]: Finished difference Result 44298 states and 173391 transitions. [2022-03-03 20:24:54,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 20:24:54,458 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:24:54,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:24:54,781 INFO L225 Difference]: With dead ends: 44298 [2022-03-03 20:24:54,781 INFO L226 Difference]: Without dead ends: 44290 [2022-03-03 20:24:54,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=1743, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 20:24:54,781 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 375 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:24:54,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 147 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:24:54,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44290 states. [2022-03-03 20:24:55,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44290 to 30719. [2022-03-03 20:24:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30719 states, 30718 states have (on average 4.038348850836643) internal successors, (124050), 30718 states have internal predecessors, (124050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30719 states to 30719 states and 124050 transitions. [2022-03-03 20:24:55,701 INFO L78 Accepts]: Start accepts. Automaton has 30719 states and 124050 transitions. Word has length 28 [2022-03-03 20:24:55,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:24:55,701 INFO L470 AbstractCegarLoop]: Abstraction has 30719 states and 124050 transitions. [2022-03-03 20:24:55,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:55,701 INFO L276 IsEmpty]: Start isEmpty. Operand 30719 states and 124050 transitions. [2022-03-03 20:24:55,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:24:55,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:24:55,749 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:24:55,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-03-03 20:24:55,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-03-03 20:24:55,950 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:24:55,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:24:55,950 INFO L85 PathProgramCache]: Analyzing trace with hash 843389690, now seen corresponding path program 74 times [2022-03-03 20:24:55,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:24:55,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561520714] [2022-03-03 20:24:55,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:24:55,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:24:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:55,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:24:55,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561520714] [2022-03-03 20:24:55,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561520714] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:24:55,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163608912] [2022-03-03 20:24:55,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:24:55,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:55,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:24:55,997 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:24:55,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-03-03 20:24:56,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:24:56,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:24:56,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:24:56,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:24:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:56,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:24:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:56,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163608912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:24:56,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:24:56,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-03-03 20:24:56,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953353089] [2022-03-03 20:24:56,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:24:56,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:24:56,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:24:56,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:24:56,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:24:56,153 INFO L87 Difference]: Start difference. First operand 30719 states and 124050 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:57,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:24:57,060 INFO L93 Difference]: Finished difference Result 44154 states and 172939 transitions. [2022-03-03 20:24:57,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 20:24:57,061 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:24:57,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:24:57,200 INFO L225 Difference]: With dead ends: 44154 [2022-03-03 20:24:57,200 INFO L226 Difference]: Without dead ends: 44142 [2022-03-03 20:24:57,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=552, Invalid=1898, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 20:24:57,200 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 353 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 20:24:57,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 187 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 20:24:57,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44142 states. [2022-03-03 20:24:58,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44142 to 30517. [2022-03-03 20:24:58,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30517 states, 30516 states have (on average 4.044599554332153) internal successors, (123425), 30516 states have internal predecessors, (123425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:58,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30517 states to 30517 states and 123425 transitions. [2022-03-03 20:24:58,172 INFO L78 Accepts]: Start accepts. Automaton has 30517 states and 123425 transitions. Word has length 28 [2022-03-03 20:24:58,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:24:58,172 INFO L470 AbstractCegarLoop]: Abstraction has 30517 states and 123425 transitions. [2022-03-03 20:24:58,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:24:58,172 INFO L276 IsEmpty]: Start isEmpty. Operand 30517 states and 123425 transitions. [2022-03-03 20:24:58,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:24:58,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:24:58,220 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:24:58,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-03-03 20:24:58,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-03-03 20:24:58,420 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:24:58,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:24:58,420 INFO L85 PathProgramCache]: Analyzing trace with hash -282838420, now seen corresponding path program 115 times [2022-03-03 20:24:58,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:24:58,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170668782] [2022-03-03 20:24:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:24:58,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:24:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:58,454 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:24:58,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170668782] [2022-03-03 20:24:58,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170668782] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:24:58,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566727744] [2022-03-03 20:24:58,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:24:58,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:24:58,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:24:58,455 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:24:58,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-03-03 20:24:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:24:58,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 20:24:58,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:24:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:58,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:24:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:24:58,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566727744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:24:58,639 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:24:58,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-03-03 20:24:58,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181719782] [2022-03-03 20:24:58,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:24:58,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 20:24:58,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:24:58,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 20:24:58,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-03-03 20:24:58,640 INFO L87 Difference]: Start difference. First operand 30517 states and 123425 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:00,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:25:00,213 INFO L93 Difference]: Finished difference Result 60203 states and 227427 transitions. [2022-03-03 20:25:00,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 20:25:00,213 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:25:00,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:25:00,511 INFO L225 Difference]: With dead ends: 60203 [2022-03-03 20:25:00,511 INFO L226 Difference]: Without dead ends: 60203 [2022-03-03 20:25:00,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1449, Invalid=3663, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 20:25:00,512 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 343 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 20:25:00,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 259 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 20:25:00,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60203 states. [2022-03-03 20:25:01,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60203 to 39354. [2022-03-03 20:25:01,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39354 states, 39353 states have (on average 4.053744314283536) internal successors, (159527), 39353 states have internal predecessors, (159527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:01,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39354 states to 39354 states and 159527 transitions. [2022-03-03 20:25:01,956 INFO L78 Accepts]: Start accepts. Automaton has 39354 states and 159527 transitions. Word has length 28 [2022-03-03 20:25:01,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:25:01,956 INFO L470 AbstractCegarLoop]: Abstraction has 39354 states and 159527 transitions. [2022-03-03 20:25:01,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 39354 states and 159527 transitions. [2022-03-03 20:25:02,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:25:02,049 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:25:02,049 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:25:02,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-03-03 20:25:02,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-03-03 20:25:02,251 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:25:02,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:25:02,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1320645726, now seen corresponding path program 116 times [2022-03-03 20:25:02,253 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:25:02,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86384132] [2022-03-03 20:25:02,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:25:02,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:25:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:25:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:25:02,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:25:02,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86384132] [2022-03-03 20:25:02,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86384132] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:25:02,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282642928] [2022-03-03 20:25:02,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:25:02,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:25:02,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:25:02,292 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:25:02,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-03-03 20:25:02,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:25:02,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:25:02,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 20:25:02,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:25:02,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:25:02,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:25:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:25:02,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282642928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:25:02,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:25:02,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-03 20:25:02,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615005952] [2022-03-03 20:25:02,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:25:02,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:25:02,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:25:02,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:25:02,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:25:02,434 INFO L87 Difference]: Start difference. First operand 39354 states and 159527 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:03,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:25:03,230 INFO L93 Difference]: Finished difference Result 57763 states and 228986 transitions. [2022-03-03 20:25:03,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 20:25:03,230 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:25:03,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:25:03,450 INFO L225 Difference]: With dead ends: 57763 [2022-03-03 20:25:03,450 INFO L226 Difference]: Without dead ends: 57691 [2022-03-03 20:25:03,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2022-03-03 20:25:03,451 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 188 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:25:03,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 139 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:25:03,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57691 states. [2022-03-03 20:25:04,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57691 to 45957. [2022-03-03 20:25:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45957 states, 45956 states have (on average 4.048024197058056) internal successors, (186031), 45956 states have internal predecessors, (186031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:04,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45957 states to 45957 states and 186031 transitions. [2022-03-03 20:25:04,729 INFO L78 Accepts]: Start accepts. Automaton has 45957 states and 186031 transitions. Word has length 28 [2022-03-03 20:25:04,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:25:04,729 INFO L470 AbstractCegarLoop]: Abstraction has 45957 states and 186031 transitions. [2022-03-03 20:25:04,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 45957 states and 186031 transitions. [2022-03-03 20:25:05,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:25:05,086 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:25:05,086 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:25:05,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-03-03 20:25:05,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:25:05,286 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:25:05,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:25:05,287 INFO L85 PathProgramCache]: Analyzing trace with hash 589421016, now seen corresponding path program 117 times [2022-03-03 20:25:05,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:25:05,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882052150] [2022-03-03 20:25:05,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:25:05,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:25:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:25:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:25:05,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:25:05,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882052150] [2022-03-03 20:25:05,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882052150] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:25:05,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201975395] [2022-03-03 20:25:05,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:25:05,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:25:05,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:25:05,327 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:25:05,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-03-03 20:25:05,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:25:05,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:25:05,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 20:25:05,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:25:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:25:05,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:25:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:25:05,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201975395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:25:05,472 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:25:05,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-03-03 20:25:05,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020768181] [2022-03-03 20:25:05,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:25:05,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 20:25:05,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:25:05,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 20:25:05,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-03-03 20:25:05,472 INFO L87 Difference]: Start difference. First operand 45957 states and 186031 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:05,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:25:05,986 INFO L93 Difference]: Finished difference Result 51952 states and 204228 transitions. [2022-03-03 20:25:05,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 20:25:05,986 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:25:05,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:25:06,432 INFO L225 Difference]: With dead ends: 51952 [2022-03-03 20:25:06,432 INFO L226 Difference]: Without dead ends: 51952 [2022-03-03 20:25:06,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2022-03-03 20:25:06,433 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 166 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:25:06,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 182 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:25:06,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51952 states. [2022-03-03 20:25:07,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51952 to 45171. [2022-03-03 20:25:07,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45171 states, 45170 states have (on average 4.038454726588443) internal successors, (182417), 45170 states have internal predecessors, (182417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:07,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45171 states to 45171 states and 182417 transitions. [2022-03-03 20:25:07,662 INFO L78 Accepts]: Start accepts. Automaton has 45171 states and 182417 transitions. Word has length 28 [2022-03-03 20:25:07,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:25:07,663 INFO L470 AbstractCegarLoop]: Abstraction has 45171 states and 182417 transitions. [2022-03-03 20:25:07,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:07,663 INFO L276 IsEmpty]: Start isEmpty. Operand 45171 states and 182417 transitions. [2022-03-03 20:25:07,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:25:07,728 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:25:07,728 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:25:07,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-03-03 20:25:07,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:25:07,929 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:25:07,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:25:07,929 INFO L85 PathProgramCache]: Analyzing trace with hash -362260422, now seen corresponding path program 118 times [2022-03-03 20:25:07,929 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:25:07,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600494160] [2022-03-03 20:25:07,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:25:07,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:25:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:25:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:25:07,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:25:07,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600494160] [2022-03-03 20:25:07,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600494160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:25:07,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586165310] [2022-03-03 20:25:07,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:25:07,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:25:07,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:25:07,970 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:25:07,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-03-03 20:25:07,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:25:07,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:25:07,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:25:07,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:25:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:25:08,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:25:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:25:08,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586165310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:25:08,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:25:08,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 20 [2022-03-03 20:25:08,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646771992] [2022-03-03 20:25:08,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:25:08,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 20:25:08,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:25:08,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 20:25:08,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-03-03 20:25:08,200 INFO L87 Difference]: Start difference. First operand 45171 states and 182417 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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) [2022-03-03 20:25:11,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:25:11,183 INFO L93 Difference]: Finished difference Result 77610 states and 296031 transitions. [2022-03-03 20:25:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-03-03 20:25:11,184 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:25:11,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:25:11,457 INFO L225 Difference]: With dead ends: 77610 [2022-03-03 20:25:11,457 INFO L226 Difference]: Without dead ends: 77610 [2022-03-03 20:25:11,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9696 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4270, Invalid=17486, Unknown=0, NotChecked=0, Total=21756 [2022-03-03 20:25:11,458 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 630 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 20:25:11,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 425 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1262 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 20:25:11,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77610 states. [2022-03-03 20:25:12,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77610 to 45207. [2022-03-03 20:25:13,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45207 states, 45206 states have (on average 4.037804716188116) internal successors, (182533), 45206 states have internal predecessors, (182533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:13,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45207 states to 45207 states and 182533 transitions. [2022-03-03 20:25:13,149 INFO L78 Accepts]: Start accepts. Automaton has 45207 states and 182533 transitions. Word has length 28 [2022-03-03 20:25:13,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:25:13,149 INFO L470 AbstractCegarLoop]: Abstraction has 45207 states and 182533 transitions. [2022-03-03 20:25:13,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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) [2022-03-03 20:25:13,149 INFO L276 IsEmpty]: Start isEmpty. Operand 45207 states and 182533 transitions. [2022-03-03 20:25:13,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:25:13,214 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:25:13,214 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:25:13,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-03-03 20:25:13,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:25:13,415 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:25:13,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:25:13,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1338579266, now seen corresponding path program 119 times [2022-03-03 20:25:13,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:25:13,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811589013] [2022-03-03 20:25:13,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:25:13,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:25:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:25:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:25:13,454 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:25:13,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811589013] [2022-03-03 20:25:13,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811589013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:25:13,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971630517] [2022-03-03 20:25:13,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:25:13,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:25:13,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:25:13,455 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:25:13,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-03-03 20:25:13,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 20:25:13,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:25:13,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:25:13,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:25:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:25:13,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:25:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:25:13,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971630517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:25:13,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:25:13,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-03-03 20:25:13,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981654272] [2022-03-03 20:25:13,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:25:13,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 20:25:13,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:25:13,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 20:25:13,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-03-03 20:25:13,949 INFO L87 Difference]: Start difference. First operand 45207 states and 182533 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:18,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:25:18,649 INFO L93 Difference]: Finished difference Result 94449 states and 358545 transitions. [2022-03-03 20:25:18,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2022-03-03 20:25:18,649 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:25:18,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:25:18,987 INFO L225 Difference]: With dead ends: 94449 [2022-03-03 20:25:18,987 INFO L226 Difference]: Without dead ends: 94449 [2022-03-03 20:25:18,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25291 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=9520, Invalid=43610, Unknown=0, NotChecked=0, Total=53130 [2022-03-03 20:25:18,989 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 992 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 2025 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 2216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 2025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:25:18,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [992 Valid, 645 Invalid, 2216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 2025 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 20:25:19,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94449 states. [2022-03-03 20:25:21,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94449 to 45179. [2022-03-03 20:25:21,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45179 states, 45178 states have (on average 4.0393554384877595) internal successors, (182490), 45178 states have internal predecessors, (182490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:21,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45179 states to 45179 states and 182490 transitions. [2022-03-03 20:25:21,206 INFO L78 Accepts]: Start accepts. Automaton has 45179 states and 182490 transitions. Word has length 28 [2022-03-03 20:25:21,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:25:21,206 INFO L470 AbstractCegarLoop]: Abstraction has 45179 states and 182490 transitions. [2022-03-03 20:25:21,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:21,206 INFO L276 IsEmpty]: Start isEmpty. Operand 45179 states and 182490 transitions. [2022-03-03 20:25:21,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:25:21,280 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:25:21,280 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:25:21,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-03-03 20:25:21,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2022-03-03 20:25:21,480 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:25:21,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:25:21,480 INFO L85 PathProgramCache]: Analyzing trace with hash -771627186, now seen corresponding path program 120 times [2022-03-03 20:25:21,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:25:21,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897831401] [2022-03-03 20:25:21,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:25:21,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:25:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:25:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:25:21,521 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:25:21,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897831401] [2022-03-03 20:25:21,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897831401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:25:21,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618927708] [2022-03-03 20:25:21,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:25:21,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:25:21,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:25:21,522 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:25:21,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-03-03 20:25:21,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 20:25:21,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:25:21,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:25:21,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:25:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:25:21,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:25:21,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:25:21,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618927708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:25:21,771 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:25:21,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-03-03 20:25:21,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933949711] [2022-03-03 20:25:21,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:25:21,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 20:25:21,771 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:25:21,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 20:25:21,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-03-03 20:25:21,772 INFO L87 Difference]: Start difference. First operand 45179 states and 182490 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:24,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:25:24,731 INFO L93 Difference]: Finished difference Result 82332 states and 312702 transitions. [2022-03-03 20:25:24,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-03-03 20:25:24,731 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:25:24,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:25:25,033 INFO L225 Difference]: With dead ends: 82332 [2022-03-03 20:25:25,033 INFO L226 Difference]: Without dead ends: 82332 [2022-03-03 20:25:25,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10185 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4890, Invalid=17162, Unknown=0, NotChecked=0, Total=22052 [2022-03-03 20:25:25,034 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 847 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 20:25:25,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [847 Valid, 493 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 20:25:25,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82332 states. [2022-03-03 20:25:26,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82332 to 44519. [2022-03-03 20:25:26,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44519 states, 44518 states have (on average 4.029583539242553) internal successors, (179389), 44518 states have internal predecessors, (179389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:26,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44519 states to 44519 states and 179389 transitions. [2022-03-03 20:25:26,910 INFO L78 Accepts]: Start accepts. Automaton has 44519 states and 179389 transitions. Word has length 28 [2022-03-03 20:25:26,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:25:26,911 INFO L470 AbstractCegarLoop]: Abstraction has 44519 states and 179389 transitions. [2022-03-03 20:25:26,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:26,911 INFO L276 IsEmpty]: Start isEmpty. Operand 44519 states and 179389 transitions. [2022-03-03 20:25:26,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:25:26,978 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:25:26,978 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:25:26,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-03-03 20:25:27,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:25:27,179 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:25:27,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:25:27,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1545282486, now seen corresponding path program 121 times [2022-03-03 20:25:27,179 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:25:27,179 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464872050] [2022-03-03 20:25:27,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:25:27,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:25:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:25:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:25:27,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:25:27,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464872050] [2022-03-03 20:25:27,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464872050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:25:27,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351600439] [2022-03-03 20:25:27,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 20:25:27,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:25:27,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:25:27,459 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:25:27,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-03-03 20:25:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:25:27,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:25:27,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:25:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:25:27,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:25:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:25:27,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351600439] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:25:27,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:25:27,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2022-03-03 20:25:27,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857415722] [2022-03-03 20:25:27,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:25:27,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:25:27,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:25:27,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:25:27,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:25:27,655 INFO L87 Difference]: Start difference. First operand 44519 states and 179389 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:28,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:25:28,186 INFO L93 Difference]: Finished difference Result 64467 states and 251495 transitions. [2022-03-03 20:25:28,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 20:25:28,187 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:25:28,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:25:28,705 INFO L225 Difference]: With dead ends: 64467 [2022-03-03 20:25:28,705 INFO L226 Difference]: Without dead ends: 64445 [2022-03-03 20:25:28,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2022-03-03 20:25:28,706 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 264 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 20:25:28,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 77 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 20:25:28,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64445 states. [2022-03-03 20:25:29,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64445 to 44756. [2022-03-03 20:25:29,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44756 states, 44755 states have (on average 4.031348452686851) internal successors, (180423), 44755 states have internal predecessors, (180423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:30,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44756 states to 44756 states and 180423 transitions. [2022-03-03 20:25:30,053 INFO L78 Accepts]: Start accepts. Automaton has 44756 states and 180423 transitions. Word has length 28 [2022-03-03 20:25:30,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:25:30,053 INFO L470 AbstractCegarLoop]: Abstraction has 44756 states and 180423 transitions. [2022-03-03 20:25:30,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:30,053 INFO L276 IsEmpty]: Start isEmpty. Operand 44756 states and 180423 transitions. [2022-03-03 20:25:30,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:25:30,122 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:25:30,122 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:25:30,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-03-03 20:25:30,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:25:30,323 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:25:30,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:25:30,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1927343648, now seen corresponding path program 122 times [2022-03-03 20:25:30,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:25:30,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614231627] [2022-03-03 20:25:30,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:25:30,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:25:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:25:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:25:30,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:25:30,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614231627] [2022-03-03 20:25:30,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614231627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:25:30,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902354161] [2022-03-03 20:25:30,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 20:25:30,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:25:30,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:25:30,355 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:25:30,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-03-03 20:25:30,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 20:25:30,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:25:30,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:25:30,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:25:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 20:25:30,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:25:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:25:30,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902354161] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:25:30,535 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:25:30,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2022-03-03 20:25:30,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627163690] [2022-03-03 20:25:30,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:25:30,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 20:25:30,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:25:30,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 20:25:30,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-03-03 20:25:30,536 INFO L87 Difference]: Start difference. First operand 44756 states and 180423 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:31,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:25:31,501 INFO L93 Difference]: Finished difference Result 77273 states and 292896 transitions. [2022-03-03 20:25:31,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 20:25:31,501 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:25:31,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:25:31,770 INFO L225 Difference]: With dead ends: 77273 [2022-03-03 20:25:31,770 INFO L226 Difference]: Without dead ends: 77273 [2022-03-03 20:25:31,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=462, Invalid=944, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 20:25:31,770 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 333 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 20:25:31,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 124 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 20:25:32,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77273 states. [2022-03-03 20:25:33,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77273 to 44235. [2022-03-03 20:25:33,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44235 states, 44234 states have (on average 4.0232626486413166) internal successors, (177965), 44234 states have internal predecessors, (177965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:33,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44235 states to 44235 states and 177965 transitions. [2022-03-03 20:25:33,425 INFO L78 Accepts]: Start accepts. Automaton has 44235 states and 177965 transitions. Word has length 28 [2022-03-03 20:25:33,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:25:33,425 INFO L470 AbstractCegarLoop]: Abstraction has 44235 states and 177965 transitions. [2022-03-03 20:25:33,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:33,425 INFO L276 IsEmpty]: Start isEmpty. Operand 44235 states and 177965 transitions. [2022-03-03 20:25:33,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:25:33,493 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:25:33,494 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:25:33,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-03-03 20:25:33,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:25:33,694 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:25:33,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:25:33,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1969871176, now seen corresponding path program 123 times [2022-03-03 20:25:33,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:25:33,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004403797] [2022-03-03 20:25:33,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:25:33,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:25:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:25:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:25:33,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:25:33,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004403797] [2022-03-03 20:25:33,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004403797] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:25:33,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184874280] [2022-03-03 20:25:33,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 20:25:33,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:25:33,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:25:33,735 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:25:33,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-03-03 20:25:33,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 20:25:33,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:25:33,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:25:33,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:25:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:25:33,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:25:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:25:33,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184874280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:25:33,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:25:33,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-03-03 20:25:33,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326774488] [2022-03-03 20:25:33,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:25:33,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 20:25:33,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:25:33,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 20:25:33,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-03-03 20:25:33,930 INFO L87 Difference]: Start difference. First operand 44235 states and 177965 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:36,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:25:36,284 INFO L93 Difference]: Finished difference Result 68843 states and 264341 transitions. [2022-03-03 20:25:36,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-03-03 20:25:36,284 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:25:36,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:25:36,542 INFO L225 Difference]: With dead ends: 68843 [2022-03-03 20:25:36,542 INFO L226 Difference]: Without dead ends: 68843 [2022-03-03 20:25:36,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6038 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2870, Invalid=11172, Unknown=0, NotChecked=0, Total=14042 [2022-03-03 20:25:36,543 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 586 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:25:36,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 338 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:25:36,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68843 states. [2022-03-03 20:25:37,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68843 to 44297. [2022-03-03 20:25:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44297 states, 44296 states have (on average 4.022259346216362) internal successors, (178170), 44296 states have internal predecessors, (178170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44297 states to 44297 states and 178170 transitions. [2022-03-03 20:25:38,309 INFO L78 Accepts]: Start accepts. Automaton has 44297 states and 178170 transitions. Word has length 28 [2022-03-03 20:25:38,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:25:38,309 INFO L470 AbstractCegarLoop]: Abstraction has 44297 states and 178170 transitions. [2022-03-03 20:25:38,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:38,309 INFO L276 IsEmpty]: Start isEmpty. Operand 44297 states and 178170 transitions. [2022-03-03 20:25:38,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:25:38,388 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:25:38,388 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:25:38,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-03-03 20:25:38,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:25:38,588 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:25:38,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:25:38,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1540182026, now seen corresponding path program 124 times [2022-03-03 20:25:38,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:25:38,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689312640] [2022-03-03 20:25:38,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:25:38,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:25:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:25:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:25:38,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:25:38,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689312640] [2022-03-03 20:25:38,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689312640] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:25:38,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522133890] [2022-03-03 20:25:38,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 20:25:38,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:25:38,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:25:38,629 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:25:38,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-03-03 20:25:38,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 20:25:38,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:25:38,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:25:38,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:25:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:25:38,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:25:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:25:38,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522133890] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:25:38,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:25:38,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-03-03 20:25:38,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721782019] [2022-03-03 20:25:38,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:25:38,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 20:25:38,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:25:38,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 20:25:38,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-03-03 20:25:38,862 INFO L87 Difference]: Start difference. First operand 44297 states and 178170 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:41,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:25:41,034 INFO L93 Difference]: Finished difference Result 70769 states and 270388 transitions. [2022-03-03 20:25:41,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-03-03 20:25:41,035 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:25:41,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:25:41,279 INFO L225 Difference]: With dead ends: 70769 [2022-03-03 20:25:41,279 INFO L226 Difference]: Without dead ends: 70769 [2022-03-03 20:25:41,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6812 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3012, Invalid=12990, Unknown=0, NotChecked=0, Total=16002 [2022-03-03 20:25:41,280 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 820 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 20:25:41,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 325 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 20:25:41,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70769 states. [2022-03-03 20:25:42,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70769 to 44871. [2022-03-03 20:25:42,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44871 states, 44870 states have (on average 4.010541564519723) internal successors, (179953), 44870 states have internal predecessors, (179953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:43,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44871 states to 44871 states and 179953 transitions. [2022-03-03 20:25:43,019 INFO L78 Accepts]: Start accepts. Automaton has 44871 states and 179953 transitions. Word has length 28 [2022-03-03 20:25:43,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:25:43,019 INFO L470 AbstractCegarLoop]: Abstraction has 44871 states and 179953 transitions. [2022-03-03 20:25:43,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:43,019 INFO L276 IsEmpty]: Start isEmpty. Operand 44871 states and 179953 transitions. [2022-03-03 20:25:43,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:25:43,087 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:25:43,087 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:25:43,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-03-03 20:25:43,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-03-03 20:25:43,287 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:25:43,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:25:43,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1585003168, now seen corresponding path program 125 times [2022-03-03 20:25:43,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:25:43,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522770672] [2022-03-03 20:25:43,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:25:43,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:25:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:25:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:25:43,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:25:43,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522770672] [2022-03-03 20:25:43,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522770672] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:25:43,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391074049] [2022-03-03 20:25:43,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 20:25:43,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:25:43,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:25:43,327 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:25:43,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-03-03 20:25:43,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 20:25:43,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:25:43,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 20:25:43,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:25:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:25:43,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:25:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 20:25:43,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391074049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:25:43,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:25:43,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-03-03 20:25:43,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185751739] [2022-03-03 20:25:43,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:25:43,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 20:25:43,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:25:43,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 20:25:43,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-03-03 20:25:43,520 INFO L87 Difference]: Start difference. First operand 44871 states and 179953 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:45,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:25:45,625 INFO L93 Difference]: Finished difference Result 69361 states and 266662 transitions. [2022-03-03 20:25:45,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-03 20:25:45,625 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 20:25:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 20:25:45,863 INFO L225 Difference]: With dead ends: 69361 [2022-03-03 20:25:45,864 INFO L226 Difference]: Without dead ends: 69353 [2022-03-03 20:25:45,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3844 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2037, Invalid=7863, Unknown=0, NotChecked=0, Total=9900 [2022-03-03 20:25:45,864 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 747 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 20:25:45,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 336 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 20:25:45,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69353 states. [2022-03-03 20:25:47,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69353 to 44732. [2022-03-03 20:25:47,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44732 states, 44731 states have (on average 4.011781538530326) internal successors, (179451), 44731 states have internal predecessors, (179451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:47,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44732 states to 44732 states and 179451 transitions. [2022-03-03 20:25:47,617 INFO L78 Accepts]: Start accepts. Automaton has 44732 states and 179451 transitions. Word has length 28 [2022-03-03 20:25:47,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 20:25:47,618 INFO L470 AbstractCegarLoop]: Abstraction has 44732 states and 179451 transitions. [2022-03-03 20:25:47,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:47,618 INFO L276 IsEmpty]: Start isEmpty. Operand 44732 states and 179451 transitions. [2022-03-03 20:25:47,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 20:25:47,696 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 20:25:47,696 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 20:25:47,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2022-03-03 20:25:47,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-03-03 20:25:47,896 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 20:25:47,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 20:25:47,897 INFO L85 PathProgramCache]: Analyzing trace with hash 838591832, now seen corresponding path program 126 times [2022-03-03 20:25:47,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 20:25:47,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914900142] [2022-03-03 20:25:47,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 20:25:47,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 20:25:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 20:25:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:25:47,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 20:25:47,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914900142] [2022-03-03 20:25:47,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914900142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 20:25:47,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137821432] [2022-03-03 20:25:47,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 20:25:47,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 20:25:47,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 20:25:47,928 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 20:25:47,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-03-03 20:25:47,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 20:25:47,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 20:25:47,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 20:25:47,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 20:25:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 20:25:48,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 20:25:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 20:25:48,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137821432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 20:25:48,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 20:25:48,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 13 [2022-03-03 20:25:48,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377872490] [2022-03-03 20:25:48,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 20:25:48,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 20:25:48,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 20:25:48,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 20:25:48,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-03-03 20:25:48,092 INFO L87 Difference]: Start difference. First operand 44732 states and 179451 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 20:25:48,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 20:25:48,642 INFO L93 Difference]: Finished difference Result 57230 states and 219298 transitions. [2022-03-03 20:25:48,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 20:25:48,643 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2022-03-03 20:25:48,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted.