/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/channel-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:08:36,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:08:36,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:08:36,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:08:36,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-15 16:08:36,227 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:08:36,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:08:36,227 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:08:36,227 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:08:36,228 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:08:36,228 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:08:36,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:08:36,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:08:36,229 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:08:36,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:08:36,230 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:08:36,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:08:36,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:08:36,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:08:36,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:08:36,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:08:36,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:08:36,230 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:08:36,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:08:36,230 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:08:36,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:08:36,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:08:36,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:08:36,231 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:08:36,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:08:36,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:08:36,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:08:36,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:08:36,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:08:36,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:08:36,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:08:36,231 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:08:36,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:08:36,232 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:08:36,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:08:36,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:08:36,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:08:36,401 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:08:36,401 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:08:36,402 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl [2022-03-15 16:08:36,403 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl' [2022-03-15 16:08:36,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:08:36,428 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:08:36,429 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:08:36,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:08:36,429 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:08:36,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:08:36" (1/1) ... [2022-03-15 16:08:36,441 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:08:36" (1/1) ... [2022-03-15 16:08:36,445 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:08:36,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:08:36,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:08:36,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:08:36,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:08:36,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:08:36" (1/1) ... [2022-03-15 16:08:36,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:08:36" (1/1) ... [2022-03-15 16:08:36,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:08:36" (1/1) ... [2022-03-15 16:08:36,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:08:36" (1/1) ... [2022-03-15 16:08:36,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:08:36" (1/1) ... [2022-03-15 16:08:36,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:08:36" (1/1) ... [2022-03-15 16:08:36,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:08:36" (1/1) ... [2022-03-15 16:08:36,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:08:36,457 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:08:36,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:08:36,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:08:36,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:08:36" (1/1) ... [2022-03-15 16:08:36,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:08:36,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:36,477 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 16:08:36,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 16:08:36,512 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:08:36,512 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:08:36,512 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:08:36,512 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:08:36,512 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:08:36,512 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:08:36,512 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:08:36,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:08:36,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:08:36,513 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 16:08:36,543 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:08:36,544 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:08:36,608 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:08:36,618 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:08:36,618 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-15 16:08:36,619 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-03-15 16:08:36,620 INFO L202 PluginConnector]: Adding new model channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:08:36 BoogieIcfgContainer [2022-03-15 16:08:36,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:08:36,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:08:36,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:08:36,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:08:36,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:08:36" (1/2) ... [2022-03-15 16:08:36,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77bcc46 and model type channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:08:36, skipping insertion in model container [2022-03-15 16:08:36,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:08:36" (2/2) ... [2022-03-15 16:08:36,625 INFO L111 eAbstractionObserver]: Analyzing ICFG channel-sum.wvr.bpl [2022-03-15 16:08:36,628 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:08:36,628 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:08:36,628 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:08:36,628 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:08:36,648 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 16:08:36,678 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:08:36,683 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 16:08:36,683 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 16:08:36,689 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 26 places, 22 transitions, 60 flow [2022-03-15 16:08:36,700 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 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) [2022-03-15 16:08:36,702 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 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) [2022-03-15 16:08:36,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 16:08:36,725 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:36,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:36,726 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:08:36,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:36,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1684811367, now seen corresponding path program 1 times [2022-03-15 16:08:36,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:36,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144096309] [2022-03-15 16:08:36,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:36,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:36,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:36,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144096309] [2022-03-15 16:08:36,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144096309] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:08:36,908 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:08:36,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:08:36,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520206893] [2022-03-15 16:08:36,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:08:36,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:08:36,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:36,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:08:36,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:08:36,961 INFO L87 Difference]: Start difference. First operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 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) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:37,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:37,006 INFO L93 Difference]: Finished difference Result 54 states and 108 transitions. [2022-03-15 16:08:37,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:08:37,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-15 16:08:37,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:37,016 INFO L225 Difference]: With dead ends: 54 [2022-03-15 16:08:37,016 INFO L226 Difference]: Without dead ends: 42 [2022-03-15 16:08:37,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:08:37,023 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:37,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 17 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:08:37,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-15 16:08:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-03-15 16:08:37,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:37,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 70 transitions. [2022-03-15 16:08:37,085 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 70 transitions. Word has length 11 [2022-03-15 16:08:37,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:37,086 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 70 transitions. [2022-03-15 16:08:37,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:37,087 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 70 transitions. [2022-03-15 16:08:37,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 16:08:37,089 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:37,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:37,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:08:37,090 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:08:37,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:37,093 INFO L85 PathProgramCache]: Analyzing trace with hash 582751290, now seen corresponding path program 1 times [2022-03-15 16:08:37,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:37,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970447262] [2022-03-15 16:08:37,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:37,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:37,122 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:37,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970447262] [2022-03-15 16:08:37,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970447262] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:08:37,123 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:08:37,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 16:08:37,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359206025] [2022-03-15 16:08:37,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:08:37,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:08:37,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:37,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:08:37,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:08:37,125 INFO L87 Difference]: Start difference. First operand 36 states and 70 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:37,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:37,136 INFO L93 Difference]: Finished difference Result 37 states and 68 transitions. [2022-03-15 16:08:37,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:08:37,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 16:08:37,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:37,137 INFO L225 Difference]: With dead ends: 37 [2022-03-15 16:08:37,137 INFO L226 Difference]: Without dead ends: 36 [2022-03-15 16:08:37,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:08:37,142 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:37,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:08:37,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-15 16:08:37,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-15 16:08:37,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 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) [2022-03-15 16:08:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2022-03-15 16:08:37,151 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 13 [2022-03-15 16:08:37,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:37,151 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2022-03-15 16:08:37,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:37,152 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2022-03-15 16:08:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 16:08:37,152 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:37,152 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:37,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 16:08:37,153 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:08:37,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:37,153 INFO L85 PathProgramCache]: Analyzing trace with hash 618632506, now seen corresponding path program 1 times [2022-03-15 16:08:37,153 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:37,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943973072] [2022-03-15 16:08:37,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:37,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:37,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:37,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943973072] [2022-03-15 16:08:37,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943973072] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:37,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577131907] [2022-03-15 16:08:37,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:37,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:37,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:37,283 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:37,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 16:08:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:37,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 16:08:37,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:37,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 16:08:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:37,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:37,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:37,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-03-15 16:08:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:37,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577131907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:37,676 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:37,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-15 16:08:37,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518347261] [2022-03-15 16:08:37,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:37,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:08:37,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:37,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:08:37,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:08:37,680 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:37,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:37,759 INFO L93 Difference]: Finished difference Result 72 states and 145 transitions. [2022-03-15 16:08:37,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 16:08:37,760 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 16:08:37,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:37,763 INFO L225 Difference]: With dead ends: 72 [2022-03-15 16:08:37,763 INFO L226 Difference]: Without dead ends: 61 [2022-03-15 16:08:37,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:08:37,766 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:37,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 85 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:08:37,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-15 16:08:37,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2022-03-15 16:08:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:37,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 89 transitions. [2022-03-15 16:08:37,772 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 89 transitions. Word has length 16 [2022-03-15 16:08:37,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:37,772 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 89 transitions. [2022-03-15 16:08:37,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 89 transitions. [2022-03-15 16:08:37,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 16:08:37,773 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:37,773 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:37,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-15 16:08:37,987 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 [2022-03-15 16:08:37,988 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:08:37,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:37,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1374832358, now seen corresponding path program 1 times [2022-03-15 16:08:37,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:37,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068916915] [2022-03-15 16:08:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:37,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:08:38,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:38,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068916915] [2022-03-15 16:08:38,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068916915] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:08:38,018 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:08:38,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:08:38,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232207241] [2022-03-15 16:08:38,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:08:38,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:08:38,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:38,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:08:38,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:08:38,020 INFO L87 Difference]: Start difference. First operand 46 states and 89 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:38,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:38,031 INFO L93 Difference]: Finished difference Result 52 states and 101 transitions. [2022-03-15 16:08:38,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:08:38,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 16:08:38,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:38,032 INFO L225 Difference]: With dead ends: 52 [2022-03-15 16:08:38,032 INFO L226 Difference]: Without dead ends: 52 [2022-03-15 16:08:38,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:08:38,033 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:38,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 16 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:08:38,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-15 16:08:38,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2022-03-15 16:08:38,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:38,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 87 transitions. [2022-03-15 16:08:38,037 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 87 transitions. Word has length 16 [2022-03-15 16:08:38,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:38,037 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 87 transitions. [2022-03-15 16:08:38,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:38,037 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 87 transitions. [2022-03-15 16:08:38,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:08:38,038 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:38,038 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:38,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 16:08:38,038 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:08:38,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:38,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2010811493, now seen corresponding path program 2 times [2022-03-15 16:08:38,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:38,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700844553] [2022-03-15 16:08:38,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:38,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:38,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:38,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:38,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700844553] [2022-03-15 16:08:38,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700844553] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:08:38,087 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:08:38,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:08:38,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170889165] [2022-03-15 16:08:38,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:08:38,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:08:38,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:38,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:08:38,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:08:38,088 INFO L87 Difference]: Start difference. First operand 45 states and 87 transitions. 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) [2022-03-15 16:08:38,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:38,104 INFO L93 Difference]: Finished difference Result 116 states and 226 transitions. [2022-03-15 16:08:38,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:08:38,104 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 [2022-03-15 16:08:38,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:38,105 INFO L225 Difference]: With dead ends: 116 [2022-03-15 16:08:38,105 INFO L226 Difference]: Without dead ends: 113 [2022-03-15 16:08:38,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:08:38,106 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:38,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 33 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:08:38,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-15 16:08:38,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2022-03-15 16:08:38,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.104651162790698) internal successors, (181), 86 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:38,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 181 transitions. [2022-03-15 16:08:38,112 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 181 transitions. Word has length 18 [2022-03-15 16:08:38,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:38,113 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 181 transitions. [2022-03-15 16:08:38,113 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) [2022-03-15 16:08:38,113 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 181 transitions. [2022-03-15 16:08:38,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:08:38,114 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:38,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:38,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-15 16:08:38,114 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:08:38,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:38,114 INFO L85 PathProgramCache]: Analyzing trace with hash -2043548103, now seen corresponding path program 3 times [2022-03-15 16:08:38,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:38,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205794836] [2022-03-15 16:08:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:38,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:08:38,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:38,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205794836] [2022-03-15 16:08:38,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205794836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:38,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098636185] [2022-03-15 16:08:38,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:08:38,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:38,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:38,134 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:38,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 16:08:38,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:08:38,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:38,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-15 16:08:38,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:08:38,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:08:38,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098636185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:38,241 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:38,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-03-15 16:08:38,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256616818] [2022-03-15 16:08:38,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:38,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:08:38,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:38,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:08:38,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:08:38,242 INFO L87 Difference]: Start difference. First operand 87 states and 181 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:38,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:38,274 INFO L93 Difference]: Finished difference Result 118 states and 228 transitions. [2022-03-15 16:08:38,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:08:38,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:08:38,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:38,275 INFO L225 Difference]: With dead ends: 118 [2022-03-15 16:08:38,275 INFO L226 Difference]: Without dead ends: 118 [2022-03-15 16:08:38,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:08:38,276 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 27 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 [2022-03-15 16:08:38,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 27 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:08:38,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-15 16:08:38,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 104. [2022-03-15 16:08:38,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:38,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 213 transitions. [2022-03-15 16:08:38,282 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 213 transitions. Word has length 21 [2022-03-15 16:08:38,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:38,282 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 213 transitions. [2022-03-15 16:08:38,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:38,282 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 213 transitions. [2022-03-15 16:08:38,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:08:38,283 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:38,283 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:38,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:38,488 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,SelfDestructingSolverStorable5 [2022-03-15 16:08:38,488 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:08:38,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:38,489 INFO L85 PathProgramCache]: Analyzing trace with hash 257954329, now seen corresponding path program 1 times [2022-03-15 16:08:38,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:38,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587165384] [2022-03-15 16:08:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:38,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:38,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:38,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587165384] [2022-03-15 16:08:38,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587165384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:38,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455810043] [2022-03-15 16:08:38,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:38,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:38,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:38,638 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:38,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 16:08:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:38,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:38,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:38,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:38,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:38,863 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 32 treesize of output 16 [2022-03-15 16:08:38,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:38,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:39,079 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:08:39,080 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 40 treesize of output 58 [2022-03-15 16:08:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:39,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455810043] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:39,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:39,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 16:08:39,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638242275] [2022-03-15 16:08:39,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:39,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:08:39,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:39,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:08:39,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:08:39,200 INFO L87 Difference]: Start difference. First operand 104 states and 213 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:39,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:39,433 INFO L93 Difference]: Finished difference Result 202 states and 419 transitions. [2022-03-15 16:08:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:08:39,434 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:08:39,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:39,434 INFO L225 Difference]: With dead ends: 202 [2022-03-15 16:08:39,434 INFO L226 Difference]: Without dead ends: 184 [2022-03-15 16:08:39,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:08:39,435 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 110 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:39,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 228 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 198 Invalid, 0 Unknown, 2 Unchecked, 0.1s Time] [2022-03-15 16:08:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-03-15 16:08:39,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2022-03-15 16:08:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.0508474576271185) internal successors, (242), 118 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:39,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 242 transitions. [2022-03-15 16:08:39,442 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 242 transitions. Word has length 21 [2022-03-15 16:08:39,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:39,442 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 242 transitions. [2022-03-15 16:08:39,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:39,443 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 242 transitions. [2022-03-15 16:08:39,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:08:39,443 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:39,443 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:39,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:39,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:39,644 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:08:39,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:39,645 INFO L85 PathProgramCache]: Analyzing trace with hash -890421551, now seen corresponding path program 2 times [2022-03-15 16:08:39,645 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:39,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731738792] [2022-03-15 16:08:39,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:39,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:39,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:39,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731738792] [2022-03-15 16:08:39,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731738792] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:39,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845719129] [2022-03-15 16:08:39,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:08:39,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:39,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:39,784 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:39,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 16:08:39,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:08:39,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:39,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:39,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:39,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:39,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:39,989 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 32 treesize of output 16 [2022-03-15 16:08:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:40,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:40,202 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:08:40,202 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 40 treesize of output 58 [2022-03-15 16:08:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:40,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845719129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:40,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:40,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 16:08:40,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302638320] [2022-03-15 16:08:40,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:40,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:08:40,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:40,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:08:40,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:08:40,336 INFO L87 Difference]: Start difference. First operand 119 states and 242 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:40,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:40,487 INFO L93 Difference]: Finished difference Result 224 states and 463 transitions. [2022-03-15 16:08:40,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:08:40,487 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:08:40,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:40,488 INFO L225 Difference]: With dead ends: 224 [2022-03-15 16:08:40,488 INFO L226 Difference]: Without dead ends: 205 [2022-03-15 16:08:40,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:08:40,489 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 102 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:40,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 190 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 147 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-03-15 16:08:40,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-15 16:08:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 116. [2022-03-15 16:08:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.034782608695652) internal successors, (234), 115 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 234 transitions. [2022-03-15 16:08:40,495 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 234 transitions. Word has length 21 [2022-03-15 16:08:40,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:40,495 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 234 transitions. [2022-03-15 16:08:40,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:40,495 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 234 transitions. [2022-03-15 16:08:40,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:08:40,496 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:40,496 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:40,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:40,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:40,711 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:08:40,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:40,712 INFO L85 PathProgramCache]: Analyzing trace with hash 2067742331, now seen corresponding path program 3 times [2022-03-15 16:08:40,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:40,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503674411] [2022-03-15 16:08:40,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:40,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:40,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:40,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503674411] [2022-03-15 16:08:40,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503674411] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:40,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090992308] [2022-03-15 16:08:40,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:08:40,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:40,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:40,821 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:40,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 16:08:40,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:08:40,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:40,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:40,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:40,965 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 16:08:40,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2022-03-15 16:08:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:40,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:41,141 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:08:41,142 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 40 treesize of output 58 [2022-03-15 16:08:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:41,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090992308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:41,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:41,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 16:08:41,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103621881] [2022-03-15 16:08:41,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:41,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 16:08:41,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:41,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 16:08:41,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:08:41,250 INFO L87 Difference]: Start difference. First operand 116 states and 234 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:41,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:41,388 INFO L93 Difference]: Finished difference Result 187 states and 385 transitions. [2022-03-15 16:08:41,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:08:41,388 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 21 [2022-03-15 16:08:41,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:41,389 INFO L225 Difference]: With dead ends: 187 [2022-03-15 16:08:41,389 INFO L226 Difference]: Without dead ends: 172 [2022-03-15 16:08:41,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-03-15 16:08:41,390 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 114 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:41,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 226 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:08:41,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-15 16:08:41,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 130. [2022-03-15 16:08:41,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.046511627906977) internal successors, (264), 129 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 264 transitions. [2022-03-15 16:08:41,395 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 264 transitions. Word has length 21 [2022-03-15 16:08:41,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:41,395 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 264 transitions. [2022-03-15 16:08:41,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:41,395 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 264 transitions. [2022-03-15 16:08:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 16:08:41,396 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:41,396 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:41,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-15 16:08:41,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:41,612 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:08:41,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:41,613 INFO L85 PathProgramCache]: Analyzing trace with hash -985673572, now seen corresponding path program 4 times [2022-03-15 16:08:41,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:41,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488119621] [2022-03-15 16:08:41,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:41,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:41,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:41,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488119621] [2022-03-15 16:08:41,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488119621] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:41,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123749734] [2022-03-15 16:08:41,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:08:41,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:41,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:41,661 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:41,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 16:08:41,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:08:41,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:41,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 16:08:41,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:41,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:41,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123749734] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:41,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:41,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-15 16:08:41,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17469344] [2022-03-15 16:08:41,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:41,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 16:08:41,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:41,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 16:08:41,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:08:41,758 INFO L87 Difference]: Start difference. First operand 130 states and 264 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:41,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:41,778 INFO L93 Difference]: Finished difference Result 273 states and 544 transitions. [2022-03-15 16:08:41,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:08:41,778 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 16:08:41,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:41,779 INFO L225 Difference]: With dead ends: 273 [2022-03-15 16:08:41,779 INFO L226 Difference]: Without dead ends: 268 [2022-03-15 16:08:41,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 16:08:41,780 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:41,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 44 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:08:41,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-03-15 16:08:41,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 175. [2022-03-15 16:08:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.0977011494252875) internal successors, (365), 174 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 365 transitions. [2022-03-15 16:08:41,784 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 365 transitions. Word has length 23 [2022-03-15 16:08:41,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:41,785 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 365 transitions. [2022-03-15 16:08:41,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:41,785 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 365 transitions. [2022-03-15 16:08:41,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:08:41,786 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:41,786 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:41,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:42,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:42,002 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:08:42,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:42,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1153685243, now seen corresponding path program 5 times [2022-03-15 16:08:42,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:42,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190771532] [2022-03-15 16:08:42,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:42,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:08:42,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:42,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190771532] [2022-03-15 16:08:42,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190771532] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:42,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967897212] [2022-03-15 16:08:42,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:08:42,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:42,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:42,111 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:42,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 16:08:42,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:08:42,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:42,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:42,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:42,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:42,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:42,324 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 32 treesize of output 16 [2022-03-15 16:08:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:08:42,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:42,516 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:08:42,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 58 [2022-03-15 16:08:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:08:42,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967897212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:42,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:42,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 16:08:42,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974170685] [2022-03-15 16:08:42,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:42,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:08:42,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:42,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:08:42,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:08:42,636 INFO L87 Difference]: Start difference. First operand 175 states and 365 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 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) [2022-03-15 16:08:42,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:42,812 INFO L93 Difference]: Finished difference Result 349 states and 729 transitions. [2022-03-15 16:08:42,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 16:08:42,813 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 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 24 [2022-03-15 16:08:42,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:42,814 INFO L225 Difference]: With dead ends: 349 [2022-03-15 16:08:42,814 INFO L226 Difference]: Without dead ends: 319 [2022-03-15 16:08:42,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:08:42,815 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 111 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:42,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 188 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 158 Invalid, 0 Unknown, 3 Unchecked, 0.1s Time] [2022-03-15 16:08:42,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-03-15 16:08:42,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 175. [2022-03-15 16:08:42,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.0977011494252875) internal successors, (365), 174 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:42,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 365 transitions. [2022-03-15 16:08:42,819 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 365 transitions. Word has length 24 [2022-03-15 16:08:42,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:42,820 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 365 transitions. [2022-03-15 16:08:42,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 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) [2022-03-15 16:08:42,820 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 365 transitions. [2022-03-15 16:08:42,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:08:42,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:42,820 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:42,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-15 16:08:43,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:43,035 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:08:43,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:43,036 INFO L85 PathProgramCache]: Analyzing trace with hash -697643197, now seen corresponding path program 6 times [2022-03-15 16:08:43,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:43,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52854779] [2022-03-15 16:08:43,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:43,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:43,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:43,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52854779] [2022-03-15 16:08:43,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52854779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:43,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084507253] [2022-03-15 16:08:43,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:08:43,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:43,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:43,132 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:43,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 16:08:43,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:08:43,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:43,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:43,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:43,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:43,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:43,362 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 32 treesize of output 16 [2022-03-15 16:08:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:43,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:43,549 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:08:43,549 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 40 treesize of output 58 [2022-03-15 16:08:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:43,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084507253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:43,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:43,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 16:08:43,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407001653] [2022-03-15 16:08:43,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:43,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:08:43,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:43,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:08:43,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:08:43,636 INFO L87 Difference]: Start difference. First operand 175 states and 365 transitions. Second operand has 20 states, 20 states have (on average 2.75) 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) [2022-03-15 16:08:43,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:43,786 INFO L93 Difference]: Finished difference Result 306 states and 642 transitions. [2022-03-15 16:08:43,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:08:43,787 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) 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 24 [2022-03-15 16:08:43,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:43,788 INFO L225 Difference]: With dead ends: 306 [2022-03-15 16:08:43,788 INFO L226 Difference]: Without dead ends: 303 [2022-03-15 16:08:43,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:08:43,789 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 83 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:43,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 238 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 184 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2022-03-15 16:08:43,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-03-15 16:08:43,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 216. [2022-03-15 16:08:43,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.1534883720930234) internal successors, (463), 215 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:43,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 463 transitions. [2022-03-15 16:08:43,793 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 463 transitions. Word has length 24 [2022-03-15 16:08:43,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:43,794 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 463 transitions. [2022-03-15 16:08:43,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) 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) [2022-03-15 16:08:43,794 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 463 transitions. [2022-03-15 16:08:43,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:08:43,794 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:43,794 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:43,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:44,007 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,SelfDestructingSolverStorable11 [2022-03-15 16:08:44,008 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:08:44,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:44,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2123351995, now seen corresponding path program 7 times [2022-03-15 16:08:44,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:44,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741010175] [2022-03-15 16:08:44,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:44,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:08:44,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:44,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741010175] [2022-03-15 16:08:44,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741010175] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:44,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918000745] [2022-03-15 16:08:44,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:08:44,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:44,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:44,108 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:44,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 16:08:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:44,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 16:08:44,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:44,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:44,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:44,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:44,326 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 32 treesize of output 16 [2022-03-15 16:08:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:08:44,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:44,503 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:08:44,503 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 40 treesize of output 58 [2022-03-15 16:08:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:08:44,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918000745] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:44,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:44,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-15 16:08:44,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448978817] [2022-03-15 16:08:44,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:44,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:08:44,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:44,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:08:44,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:08:44,601 INFO L87 Difference]: Start difference. First operand 216 states and 463 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 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) [2022-03-15 16:08:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:44,760 INFO L93 Difference]: Finished difference Result 399 states and 847 transitions. [2022-03-15 16:08:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:08:44,760 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 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 24 [2022-03-15 16:08:44,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:44,762 INFO L225 Difference]: With dead ends: 399 [2022-03-15 16:08:44,762 INFO L226 Difference]: Without dead ends: 381 [2022-03-15 16:08:44,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:08:44,762 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 136 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:44,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 214 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 155 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-03-15 16:08:44,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-03-15 16:08:44,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 238. [2022-03-15 16:08:44,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.168776371308017) internal successors, (514), 237 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 514 transitions. [2022-03-15 16:08:44,769 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 514 transitions. Word has length 24 [2022-03-15 16:08:44,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:44,769 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 514 transitions. [2022-03-15 16:08:44,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 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) [2022-03-15 16:08:44,769 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 514 transitions. [2022-03-15 16:08:44,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:08:44,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:44,770 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:44,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:44,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 16:08:44,986 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:08:44,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:44,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1093117114, now seen corresponding path program 8 times [2022-03-15 16:08:44,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:44,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139175465] [2022-03-15 16:08:44,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:44,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:45,124 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:08:45,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:45,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139175465] [2022-03-15 16:08:45,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139175465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:45,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920137278] [2022-03-15 16:08:45,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:08:45,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:45,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:45,125 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:45,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 16:08:45,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:08:45,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:45,151 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:08:45,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:45,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:45,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:45,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:45,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:45,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:45,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:45,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 23 [2022-03-15 16:08:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:45,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:45,765 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:08:45,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 112 [2022-03-15 16:08:45,972 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:45,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920137278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:45,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:45,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2022-03-15 16:08:45,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491688241] [2022-03-15 16:08:45,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:45,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:08:45,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:45,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:08:45,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:08:45,973 INFO L87 Difference]: Start difference. First operand 238 states and 514 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 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) [2022-03-15 16:08:46,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:46,837 INFO L93 Difference]: Finished difference Result 943 states and 1974 transitions. [2022-03-15 16:08:46,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 16:08:46,837 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 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 [2022-03-15 16:08:46,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:46,840 INFO L225 Difference]: With dead ends: 943 [2022-03-15 16:08:46,840 INFO L226 Difference]: Without dead ends: 728 [2022-03-15 16:08:46,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=445, Invalid=2525, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:08:46,841 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 394 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:46,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 528 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 453 Invalid, 0 Unknown, 13 Unchecked, 0.3s Time] [2022-03-15 16:08:46,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-03-15 16:08:46,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 283. [2022-03-15 16:08:46,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.2092198581560285) internal successors, (623), 282 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:46,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 623 transitions. [2022-03-15 16:08:46,848 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 623 transitions. Word has length 26 [2022-03-15 16:08:46,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:46,848 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 623 transitions. [2022-03-15 16:08:46,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 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) [2022-03-15 16:08:46,849 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 623 transitions. [2022-03-15 16:08:46,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:08:46,849 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:46,850 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:46,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:47,065 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,SelfDestructingSolverStorable13 [2022-03-15 16:08:47,065 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:08:47,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:47,066 INFO L85 PathProgramCache]: Analyzing trace with hash -380854990, now seen corresponding path program 9 times [2022-03-15 16:08:47,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:47,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187658717] [2022-03-15 16:08:47,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:47,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:47,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:47,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187658717] [2022-03-15 16:08:47,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187658717] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:47,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618445576] [2022-03-15 16:08:47,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:08:47,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:47,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:47,218 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:47,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 16:08:47,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:08:47,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:47,243 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 16:08:47,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:47,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:47,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:47,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:47,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:47,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:47,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:47,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 23 [2022-03-15 16:08:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:47,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:47,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:47,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:47,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:47,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:47,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:48,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:48,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:48,043 INFO L353 Elim1Store]: treesize reduction 19, result has 76.5 percent of original size [2022-03-15 16:08:48,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 56 treesize of output 89 [2022-03-15 16:08:48,276 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:48,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618445576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:48,277 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:48,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 16:08:48,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608294519] [2022-03-15 16:08:48,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:48,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:08:48,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:48,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:08:48,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:08:48,278 INFO L87 Difference]: Start difference. First operand 283 states and 623 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:48,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:48,784 INFO L93 Difference]: Finished difference Result 639 states and 1406 transitions. [2022-03-15 16:08:48,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:08:48,785 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 16:08:48,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:48,787 INFO L225 Difference]: With dead ends: 639 [2022-03-15 16:08:48,787 INFO L226 Difference]: Without dead ends: 595 [2022-03-15 16:08:48,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=375, Invalid=1695, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:08:48,790 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 157 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:48,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 525 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 223 Invalid, 0 Unknown, 237 Unchecked, 0.1s Time] [2022-03-15 16:08:48,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-03-15 16:08:48,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 344. [2022-03-15 16:08:48,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.192419825072886) internal successors, (752), 343 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:48,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 752 transitions. [2022-03-15 16:08:48,798 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 752 transitions. Word has length 26 [2022-03-15 16:08:48,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:48,798 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 752 transitions. [2022-03-15 16:08:48,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:48,798 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 752 transitions. [2022-03-15 16:08:48,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:08:48,799 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:48,799 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:48,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:49,014 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,SelfDestructingSolverStorable14 [2022-03-15 16:08:49,015 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:08:49,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:49,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1073760540, now seen corresponding path program 10 times [2022-03-15 16:08:49,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:49,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945934353] [2022-03-15 16:08:49,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:49,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:49,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:49,173 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:49,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945934353] [2022-03-15 16:08:49,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945934353] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:49,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829728472] [2022-03-15 16:08:49,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:08:49,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:49,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:49,174 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:49,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 16:08:49,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:08:49,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:49,194 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:08:49,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:49,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:49,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:49,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:49,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:49,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:49,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:49,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:49,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:49,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 23 [2022-03-15 16:08:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:49,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:49,807 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:08:49,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 112 [2022-03-15 16:08:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:50,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829728472] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:50,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:50,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 16:08:50,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154413545] [2022-03-15 16:08:50,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:50,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:08:50,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:50,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:08:50,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:08:50,015 INFO L87 Difference]: Start difference. First operand 344 states and 752 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-15 16:08:50,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:50,498 INFO L93 Difference]: Finished difference Result 659 states and 1418 transitions. [2022-03-15 16:08:50,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:08:50,499 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 [2022-03-15 16:08:50,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:50,501 INFO L225 Difference]: With dead ends: 659 [2022-03-15 16:08:50,501 INFO L226 Difference]: Without dead ends: 616 [2022-03-15 16:08:50,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=279, Invalid=1613, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:08:50,502 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 204 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:50,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 673 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 466 Invalid, 0 Unknown, 116 Unchecked, 0.2s Time] [2022-03-15 16:08:50,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-03-15 16:08:50,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 400. [2022-03-15 16:08:50,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.182957393483709) internal successors, (871), 399 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:50,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 871 transitions. [2022-03-15 16:08:50,509 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 871 transitions. Word has length 26 [2022-03-15 16:08:50,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:50,509 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 871 transitions. [2022-03-15 16:08:50,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-15 16:08:50,510 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 871 transitions. [2022-03-15 16:08:50,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:08:50,510 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:50,510 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:50,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-15 16:08:50,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-15 16:08:50,725 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:08:50,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:50,726 INFO L85 PathProgramCache]: Analyzing trace with hash 82946818, now seen corresponding path program 11 times [2022-03-15 16:08:50,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:50,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562243330] [2022-03-15 16:08:50,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:50,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:08:50,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:50,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562243330] [2022-03-15 16:08:50,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562243330] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:50,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573178400] [2022-03-15 16:08:50,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:08:50,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:50,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:50,870 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:50,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 16:08:50,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:08:50,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:50,894 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:08:50,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:51,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:51,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:51,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:51,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:51,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:51,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:51,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:51,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:51,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:51,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-03-15 16:08:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:51,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:51,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:51,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:51,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:51,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:51,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:51,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:51,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:51,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:51,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:51,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:08:51,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 92 [2022-03-15 16:08:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:51,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573178400] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:51,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:51,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2022-03-15 16:08:51,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162413849] [2022-03-15 16:08:51,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:51,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:08:51,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:51,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:08:51,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:08:51,599 INFO L87 Difference]: Start difference. First operand 400 states and 871 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 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) [2022-03-15 16:08:52,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:52,506 INFO L93 Difference]: Finished difference Result 1277 states and 2665 transitions. [2022-03-15 16:08:52,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 16:08:52,506 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 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 [2022-03-15 16:08:52,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:52,509 INFO L225 Difference]: With dead ends: 1277 [2022-03-15 16:08:52,509 INFO L226 Difference]: Without dead ends: 1037 [2022-03-15 16:08:52,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=464, Invalid=2728, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:08:52,510 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 361 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:52,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 920 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 793 Invalid, 0 Unknown, 68 Unchecked, 0.4s Time] [2022-03-15 16:08:52,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-03-15 16:08:52,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 448. [2022-03-15 16:08:52,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 2.170022371364653) internal successors, (970), 447 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:52,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 970 transitions. [2022-03-15 16:08:52,520 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 970 transitions. Word has length 26 [2022-03-15 16:08:52,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:52,520 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 970 transitions. [2022-03-15 16:08:52,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 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) [2022-03-15 16:08:52,520 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 970 transitions. [2022-03-15 16:08:52,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:08:52,521 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:52,521 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:52,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:52,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-15 16:08:52,727 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:08:52,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:52,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1391025286, now seen corresponding path program 12 times [2022-03-15 16:08:52,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:52,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736852996] [2022-03-15 16:08:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:52,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:52,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:52,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736852996] [2022-03-15 16:08:52,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736852996] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:52,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017769553] [2022-03-15 16:08:52,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:08:52,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:52,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:52,880 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:52,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 16:08:52,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:08:52,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:52,905 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:08:52,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:53,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:53,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:53,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:53,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:53,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:53,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:53,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:53,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 23 [2022-03-15 16:08:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:53,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:53,498 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:08:53,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 112 [2022-03-15 16:08:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:53,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017769553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:53,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:53,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 16:08:53,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935847519] [2022-03-15 16:08:53,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:53,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:08:53,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:53,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:08:53,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:08:53,726 INFO L87 Difference]: Start difference. First operand 448 states and 970 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-15 16:08:54,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:54,466 INFO L93 Difference]: Finished difference Result 956 states and 2038 transitions. [2022-03-15 16:08:54,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 16:08:54,466 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 [2022-03-15 16:08:54,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:54,469 INFO L225 Difference]: With dead ends: 956 [2022-03-15 16:08:54,469 INFO L226 Difference]: Without dead ends: 938 [2022-03-15 16:08:54,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=432, Invalid=2760, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:08:54,470 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 154 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:54,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 862 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 490 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2022-03-15 16:08:54,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-03-15 16:08:54,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 636. [2022-03-15 16:08:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 2.264566929133858) internal successors, (1438), 635 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:54,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1438 transitions. [2022-03-15 16:08:54,482 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1438 transitions. Word has length 26 [2022-03-15 16:08:54,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:54,482 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1438 transitions. [2022-03-15 16:08:54,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-15 16:08:54,482 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1438 transitions. [2022-03-15 16:08:54,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:08:54,483 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:54,483 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:54,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-15 16:08:54,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:54,699 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:08:54,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:54,699 INFO L85 PathProgramCache]: Analyzing trace with hash 63590244, now seen corresponding path program 13 times [2022-03-15 16:08:54,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:54,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725137333] [2022-03-15 16:08:54,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:54,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:54,859 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:54,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:54,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725137333] [2022-03-15 16:08:54,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725137333] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:54,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665755617] [2022-03-15 16:08:54,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:08:54,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:54,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:54,861 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:54,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 16:08:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:54,880 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:08:54,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:55,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:55,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:55,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:55,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:55,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:55,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:55,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 23 [2022-03-15 16:08:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:55,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:55,516 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:08:55,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 112 [2022-03-15 16:08:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:55,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665755617] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:55,686 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:55,686 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 16:08:55,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227953376] [2022-03-15 16:08:55,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:55,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:08:55,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:55,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:08:55,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:08:55,688 INFO L87 Difference]: Start difference. First operand 636 states and 1438 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-15 16:08:56,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:56,476 INFO L93 Difference]: Finished difference Result 1334 states and 2937 transitions. [2022-03-15 16:08:56,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 16:08:56,476 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 [2022-03-15 16:08:56,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:56,480 INFO L225 Difference]: With dead ends: 1334 [2022-03-15 16:08:56,480 INFO L226 Difference]: Without dead ends: 1284 [2022-03-15 16:08:56,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=475, Invalid=3065, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 16:08:56,481 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 241 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:56,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 761 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 554 Invalid, 0 Unknown, 140 Unchecked, 0.3s Time] [2022-03-15 16:08:56,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-03-15 16:08:56,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 743. [2022-03-15 16:08:56,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 2.2735849056603774) internal successors, (1687), 742 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:56,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1687 transitions. [2022-03-15 16:08:56,496 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1687 transitions. Word has length 26 [2022-03-15 16:08:56,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:56,496 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1687 transitions. [2022-03-15 16:08:56,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-15 16:08:56,496 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1687 transitions. [2022-03-15 16:08:56,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:08:56,496 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:56,497 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:56,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:56,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:56,713 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:08:56,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:56,713 INFO L85 PathProgramCache]: Analyzing trace with hash 915605980, now seen corresponding path program 14 times [2022-03-15 16:08:56,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:56,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256347119] [2022-03-15 16:08:56,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:56,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:56,867 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:56,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:56,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256347119] [2022-03-15 16:08:56,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256347119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:56,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30164487] [2022-03-15 16:08:56,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:08:56,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:56,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:56,868 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:56,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 16:08:56,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:08:56,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:56,892 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:08:56,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:57,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:57,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:57,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:57,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:57,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:57,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:57,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:57,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:57,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 23 [2022-03-15 16:08:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:57,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:57,517 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:08:57,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 112 [2022-03-15 16:08:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:57,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30164487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:57,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:57,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 16:08:57,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037491558] [2022-03-15 16:08:57,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:57,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 16:08:57,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:57,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 16:08:57,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:08:57,765 INFO L87 Difference]: Start difference. First operand 743 states and 1687 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-15 16:08:58,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:08:58,094 INFO L93 Difference]: Finished difference Result 1151 states and 2543 transitions. [2022-03-15 16:08:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:08:58,095 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 [2022-03-15 16:08:58,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:08:58,098 INFO L225 Difference]: With dead ends: 1151 [2022-03-15 16:08:58,098 INFO L226 Difference]: Without dead ends: 1115 [2022-03-15 16:08:58,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:08:58,099 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 199 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:08:58,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 614 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 440 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-03-15 16:08:58,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2022-03-15 16:08:58,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 781. [2022-03-15 16:08:58,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 2.2846153846153845) internal successors, (1782), 780 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:08:58,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1782 transitions. [2022-03-15 16:08:58,117 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1782 transitions. Word has length 26 [2022-03-15 16:08:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:08:58,117 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 1782 transitions. [2022-03-15 16:08:58,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-15 16:08:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1782 transitions. [2022-03-15 16:08:58,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:08:58,118 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:08:58,118 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:08:58,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 16:08:58,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:58,334 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:08:58,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:08:58,334 INFO L85 PathProgramCache]: Analyzing trace with hash 622781848, now seen corresponding path program 15 times [2022-03-15 16:08:58,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:08:58,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855501790] [2022-03-15 16:08:58,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:08:58,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:08:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:08:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:08:58,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:08:58,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855501790] [2022-03-15 16:08:58,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855501790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:08:58,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341124578] [2022-03-15 16:08:58,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:08:58,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:08:58,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:08:58,477 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:08:58,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 16:08:58,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:08:58,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:08:58,497 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:08:58,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:08:58,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:58,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:08:58,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:58,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:08:58,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 23 [2022-03-15 16:08:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:58,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:08:59,046 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:08:59,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 112 [2022-03-15 16:08:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:08:59,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341124578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:08:59,304 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:08:59,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2022-03-15 16:08:59,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385598030] [2022-03-15 16:08:59,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:08:59,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:08:59,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:08:59,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:08:59,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:08:59,305 INFO L87 Difference]: Start difference. First operand 781 states and 1782 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 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) [2022-03-15 16:09:00,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:00,195 INFO L93 Difference]: Finished difference Result 1683 states and 3632 transitions. [2022-03-15 16:09:00,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:09:00,196 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 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 [2022-03-15 16:09:00,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:00,200 INFO L225 Difference]: With dead ends: 1683 [2022-03-15 16:09:00,200 INFO L226 Difference]: Without dead ends: 1442 [2022-03-15 16:09:00,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=415, Invalid=2447, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:09:00,201 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 363 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:00,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 988 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 860 Invalid, 0 Unknown, 75 Unchecked, 0.4s Time] [2022-03-15 16:09:00,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2022-03-15 16:09:00,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 841. [2022-03-15 16:09:00,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 2.2738095238095237) internal successors, (1910), 840 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:00,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1910 transitions. [2022-03-15 16:09:00,217 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1910 transitions. Word has length 26 [2022-03-15 16:09:00,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:00,217 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1910 transitions. [2022-03-15 16:09:00,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 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) [2022-03-15 16:09:00,217 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1910 transitions. [2022-03-15 16:09:00,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:09:00,218 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:00,218 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:00,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:00,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:00,426 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:09:00,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:00,427 INFO L85 PathProgramCache]: Analyzing trace with hash -851190256, now seen corresponding path program 16 times [2022-03-15 16:09:00,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:00,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673879635] [2022-03-15 16:09:00,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:00,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:00,601 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:00,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673879635] [2022-03-15 16:09:00,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673879635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:00,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96604959] [2022-03-15 16:09:00,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:09:00,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:00,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:00,602 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:00,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 16:09:00,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:09:00,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:00,624 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:09:00,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:00,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:00,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:00,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:00,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:00,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:00,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:00,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 23 [2022-03-15 16:09:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:00,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:01,216 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:09:01,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 112 [2022-03-15 16:09:01,499 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:01,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96604959] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:01,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:01,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 16:09:01,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700360347] [2022-03-15 16:09:01,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:01,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:09:01,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:01,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:09:01,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:09:01,501 INFO L87 Difference]: Start difference. First operand 841 states and 1910 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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) [2022-03-15 16:09:02,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:02,547 INFO L93 Difference]: Finished difference Result 1643 states and 3643 transitions. [2022-03-15 16:09:02,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:09:02,548 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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 [2022-03-15 16:09:02,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:02,552 INFO L225 Difference]: With dead ends: 1643 [2022-03-15 16:09:02,552 INFO L226 Difference]: Without dead ends: 1583 [2022-03-15 16:09:02,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=591, Invalid=3831, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 16:09:02,554 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 246 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:02,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 948 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 668 Invalid, 0 Unknown, 156 Unchecked, 0.3s Time] [2022-03-15 16:09:02,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2022-03-15 16:09:02,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 697. [2022-03-15 16:09:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 2.211206896551724) internal successors, (1539), 696 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:02,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1539 transitions. [2022-03-15 16:09:02,567 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1539 transitions. Word has length 26 [2022-03-15 16:09:02,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:02,567 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 1539 transitions. [2022-03-15 16:09:02,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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) [2022-03-15 16:09:02,568 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1539 transitions. [2022-03-15 16:09:02,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:09:02,568 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:02,568 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:02,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-15 16:09:02,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:02,784 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:09:02,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:02,785 INFO L85 PathProgramCache]: Analyzing trace with hash 603425274, now seen corresponding path program 17 times [2022-03-15 16:09:02,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:02,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098498604] [2022-03-15 16:09:02,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:02,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:02,935 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:02,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098498604] [2022-03-15 16:09:02,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098498604] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:02,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264822451] [2022-03-15 16:09:02,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:09:02,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:02,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:02,936 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:02,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 16:09:02,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:09:02,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:02,957 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:09:02,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:03,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:03,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:03,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:03,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:03,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 23 [2022-03-15 16:09:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:03,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:03,507 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:09:03,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 112 [2022-03-15 16:09:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:03,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264822451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:03,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:03,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 16:09:03,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28197497] [2022-03-15 16:09:03,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:03,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:09:03,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:03,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:09:03,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:09:03,681 INFO L87 Difference]: Start difference. First operand 697 states and 1539 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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) [2022-03-15 16:09:04,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:04,533 INFO L93 Difference]: Finished difference Result 1410 states and 3058 transitions. [2022-03-15 16:09:04,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:09:04,533 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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 [2022-03-15 16:09:04,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:04,537 INFO L225 Difference]: With dead ends: 1410 [2022-03-15 16:09:04,537 INFO L226 Difference]: Without dead ends: 1360 [2022-03-15 16:09:04,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=471, Invalid=2951, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 16:09:04,538 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 326 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:04,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 1020 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 758 Invalid, 0 Unknown, 186 Unchecked, 0.3s Time] [2022-03-15 16:09:04,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2022-03-15 16:09:04,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 691. [2022-03-15 16:09:04,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 2.205797101449275) internal successors, (1522), 690 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:04,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1522 transitions. [2022-03-15 16:09:04,550 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1522 transitions. Word has length 26 [2022-03-15 16:09:04,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:04,551 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 1522 transitions. [2022-03-15 16:09:04,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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) [2022-03-15 16:09:04,551 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1522 transitions. [2022-03-15 16:09:04,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:09:04,551 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:04,551 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:04,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:04,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:04,767 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:09:04,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:04,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1455441010, now seen corresponding path program 18 times [2022-03-15 16:09:04,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:04,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799456434] [2022-03-15 16:09:04,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:04,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:04,933 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:04,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799456434] [2022-03-15 16:09:04,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799456434] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:04,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820302384] [2022-03-15 16:09:04,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:09:04,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:04,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:04,934 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:04,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:09:04,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:04,959 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:09:04,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:04,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 16:09:05,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:05,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:05,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:05,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:05,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:05,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 23 [2022-03-15 16:09:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:05,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:05,558 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:09:05,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 112 [2022-03-15 16:09:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:05,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820302384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:05,723 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:05,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 16:09:05,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966945580] [2022-03-15 16:09:05,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:05,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 16:09:05,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:05,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 16:09:05,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:09:05,724 INFO L87 Difference]: Start difference. First operand 691 states and 1522 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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) [2022-03-15 16:09:06,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:06,201 INFO L93 Difference]: Finished difference Result 1225 states and 2663 transitions. [2022-03-15 16:09:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 16:09:06,201 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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 [2022-03-15 16:09:06,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:06,204 INFO L225 Difference]: With dead ends: 1225 [2022-03-15 16:09:06,204 INFO L226 Difference]: Without dead ends: 1193 [2022-03-15 16:09:06,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=1781, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:09:06,205 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 207 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:06,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 769 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 443 Invalid, 0 Unknown, 264 Unchecked, 0.2s Time] [2022-03-15 16:09:06,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2022-03-15 16:09:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 815. [2022-03-15 16:09:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 2.2248157248157248) internal successors, (1811), 814 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1811 transitions. [2022-03-15 16:09:06,217 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1811 transitions. Word has length 26 [2022-03-15 16:09:06,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:06,217 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 1811 transitions. [2022-03-15 16:09:06,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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) [2022-03-15 16:09:06,217 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1811 transitions. [2022-03-15 16:09:06,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 16:09:06,218 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:06,218 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:06,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:06,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-15 16:09:06,428 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:09:06,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:06,429 INFO L85 PathProgramCache]: Analyzing trace with hash -818373156, now seen corresponding path program 19 times [2022-03-15 16:09:06,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:06,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611221961] [2022-03-15 16:09:06,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:06,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:06,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:06,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611221961] [2022-03-15 16:09:06,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611221961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:06,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117835469] [2022-03-15 16:09:06,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:09:06,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:06,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:06,586 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:06,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 16:09:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:06,605 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 16:09:06,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:06,814 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 16:09:06,814 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 51 treesize of output 23 [2022-03-15 16:09:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:06,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:07,105 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 16:09:07,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 112 [2022-03-15 16:09:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:07,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117835469] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:07,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:07,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:09:07,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640481440] [2022-03-15 16:09:07,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:07,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:09:07,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:07,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:09:07,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:09:07,287 INFO L87 Difference]: Start difference. First operand 815 states and 1811 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) 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) [2022-03-15 16:09:07,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:07,621 INFO L93 Difference]: Finished difference Result 1100 states and 2418 transitions. [2022-03-15 16:09:07,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:09:07,622 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) 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 [2022-03-15 16:09:07,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:07,625 INFO L225 Difference]: With dead ends: 1100 [2022-03-15 16:09:07,625 INFO L226 Difference]: Without dead ends: 1077 [2022-03-15 16:09:07,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:09:07,626 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 160 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:07,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 640 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:09:07,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-03-15 16:09:07,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 801. [2022-03-15 16:09:07,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 2.22125) internal successors, (1777), 800 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:07,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1777 transitions. [2022-03-15 16:09:07,638 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1777 transitions. Word has length 26 [2022-03-15 16:09:07,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:07,638 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 1777 transitions. [2022-03-15 16:09:07,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) 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) [2022-03-15 16:09:07,638 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1777 transitions. [2022-03-15 16:09:07,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 16:09:07,639 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:07,639 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:07,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:07,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-15 16:09:07,844 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:09:07,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:07,844 INFO L85 PathProgramCache]: Analyzing trace with hash 6216637, now seen corresponding path program 20 times [2022-03-15 16:09:07,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:07,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057654843] [2022-03-15 16:09:07,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:07,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:07,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:07,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057654843] [2022-03-15 16:09:07,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057654843] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:07,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123880797] [2022-03-15 16:09:07,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:09:07,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:07,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:07,872 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:07,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 16:09:07,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:09:07,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:07,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 16:09:07,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:07,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:07,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123880797] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:07,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:07,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-15 16:09:07,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563345684] [2022-03-15 16:09:07,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:07,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 16:09:07,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:07,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 16:09:07,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:09:07,969 INFO L87 Difference]: Start difference. First operand 801 states and 1777 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:07,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:07,997 INFO L93 Difference]: Finished difference Result 1261 states and 2772 transitions. [2022-03-15 16:09:07,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 16:09:07,998 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:09:07,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:08,001 INFO L225 Difference]: With dead ends: 1261 [2022-03-15 16:09:08,001 INFO L226 Difference]: Without dead ends: 1254 [2022-03-15 16:09:08,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:09:08,002 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:08,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 66 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:09:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2022-03-15 16:09:08,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 1028. [2022-03-15 16:09:08,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 2.2482960077896785) internal successors, (2309), 1027 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:08,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 2309 transitions. [2022-03-15 16:09:08,018 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 2309 transitions. Word has length 28 [2022-03-15 16:09:08,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:08,018 INFO L470 AbstractCegarLoop]: Abstraction has 1028 states and 2309 transitions. [2022-03-15 16:09:08,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:08,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 2309 transitions. [2022-03-15 16:09:08,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:09:08,020 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:08,020 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:08,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-15 16:09:08,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-15 16:09:08,221 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:09:08,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:08,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1607383775, now seen corresponding path program 21 times [2022-03-15 16:09:08,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:08,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372345766] [2022-03-15 16:09:08,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:08,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:09:08,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:08,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372345766] [2022-03-15 16:09:08,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372345766] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:08,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265334056] [2022-03-15 16:09:08,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:09:08,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:08,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:08,435 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:08,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 16:09:08,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:09:08,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:08,458 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:09:08,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:08,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:08,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:08,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:08,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:08,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:08,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:08,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:08,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:08,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:08,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:08,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:08,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:08,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:08,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:09:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:08,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:09,419 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:09:09,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:09:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:09,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265334056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:09,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:09,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2022-03-15 16:09:09,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201210964] [2022-03-15 16:09:09,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:09,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:09:09,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:09,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:09:09,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:09:09,727 INFO L87 Difference]: Start difference. First operand 1028 states and 2309 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:11,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:11,308 INFO L93 Difference]: Finished difference Result 2796 states and 6050 transitions. [2022-03-15 16:09:11,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:09:11,308 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:09:11,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:11,315 INFO L225 Difference]: With dead ends: 2796 [2022-03-15 16:09:11,315 INFO L226 Difference]: Without dead ends: 2528 [2022-03-15 16:09:11,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2177 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=820, Invalid=5660, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 16:09:11,317 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 396 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:11,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 981 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 743 Invalid, 0 Unknown, 115 Unchecked, 0.4s Time] [2022-03-15 16:09:11,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2022-03-15 16:09:11,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 1250. [2022-03-15 16:09:11,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 2.2722177742193757) internal successors, (2838), 1249 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:11,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 2838 transitions. [2022-03-15 16:09:11,350 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 2838 transitions. Word has length 31 [2022-03-15 16:09:11,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:11,350 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 2838 transitions. [2022-03-15 16:09:11,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:11,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 2838 transitions. [2022-03-15 16:09:11,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:09:11,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:11,352 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:11,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-15 16:09:11,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:11,559 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:09:11,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:11,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1539207641, now seen corresponding path program 22 times [2022-03-15 16:09:11,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:11,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405007650] [2022-03-15 16:09:11,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:11,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:11,759 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:11,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405007650] [2022-03-15 16:09:11,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405007650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:11,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545021342] [2022-03-15 16:09:11,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:09:11,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:11,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:11,761 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:11,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 16:09:11,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:09:11,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:11,781 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:09:11,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:12,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:12,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:12,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:12,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:12,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:12,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:12,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:12,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:12,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:12,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:12,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:12,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:12,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:09:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:12,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:12,745 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:09:12,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:09:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:13,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545021342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:13,269 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:13,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 16:09:13,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729298419] [2022-03-15 16:09:13,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:13,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:09:13,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:13,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:09:13,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:09:13,270 INFO L87 Difference]: Start difference. First operand 1250 states and 2838 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:14,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:14,998 INFO L93 Difference]: Finished difference Result 3258 states and 7175 transitions. [2022-03-15 16:09:14,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-15 16:09:14,999 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:09:14,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:15,005 INFO L225 Difference]: With dead ends: 3258 [2022-03-15 16:09:15,006 INFO L226 Difference]: Without dead ends: 3166 [2022-03-15 16:09:15,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2725 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=921, Invalid=7269, Unknown=0, NotChecked=0, Total=8190 [2022-03-15 16:09:15,007 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 344 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:15,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 1072 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 830 Invalid, 0 Unknown, 75 Unchecked, 0.4s Time] [2022-03-15 16:09:15,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2022-03-15 16:09:15,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 1217. [2022-03-15 16:09:15,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 1216 states have (on average 2.2590460526315788) internal successors, (2747), 1216 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:15,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 2747 transitions. [2022-03-15 16:09:15,032 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 2747 transitions. Word has length 31 [2022-03-15 16:09:15,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:15,032 INFO L470 AbstractCegarLoop]: Abstraction has 1217 states and 2747 transitions. [2022-03-15 16:09:15,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:15,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 2747 transitions. [2022-03-15 16:09:15,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:09:15,033 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:15,033 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:15,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-15 16:09:15,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-15 16:09:15,247 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:09:15,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:15,248 INFO L85 PathProgramCache]: Analyzing trace with hash 202404227, now seen corresponding path program 23 times [2022-03-15 16:09:15,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:15,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984858614] [2022-03-15 16:09:15,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:15,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:15,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:15,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984858614] [2022-03-15 16:09:15,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984858614] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:15,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107124802] [2022-03-15 16:09:15,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:09:15,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:15,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:15,443 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:15,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 16:09:15,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:09:15,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:15,466 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:09:15,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:15,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:15,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:15,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:15,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:15,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:15,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:15,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:15,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:15,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:15,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:15,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:15,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:15,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:15,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:15,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:15,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:09:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:15,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:16,428 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:09:16,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:09:16,800 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:16,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107124802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:16,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:16,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 16:09:16,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643875547] [2022-03-15 16:09:16,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:16,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:09:16,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:16,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:09:16,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:09:16,801 INFO L87 Difference]: Start difference. First operand 1217 states and 2747 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:18,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:18,247 INFO L93 Difference]: Finished difference Result 2795 states and 6172 transitions. [2022-03-15 16:09:18,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 16:09:18,248 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:09:18,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:18,252 INFO L225 Difference]: With dead ends: 2795 [2022-03-15 16:09:18,252 INFO L226 Difference]: Without dead ends: 2714 [2022-03-15 16:09:18,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=735, Invalid=5745, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 16:09:18,253 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 388 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:18,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 1080 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 745 Invalid, 0 Unknown, 130 Unchecked, 0.4s Time] [2022-03-15 16:09:18,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2022-03-15 16:09:18,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 1126. [2022-03-15 16:09:18,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 1125 states have (on average 2.2497777777777777) internal successors, (2531), 1125 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:18,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 2531 transitions. [2022-03-15 16:09:18,274 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 2531 transitions. Word has length 31 [2022-03-15 16:09:18,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:18,274 INFO L470 AbstractCegarLoop]: Abstraction has 1126 states and 2531 transitions. [2022-03-15 16:09:18,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:18,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 2531 transitions. [2022-03-15 16:09:18,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:09:18,276 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:18,276 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:18,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-15 16:09:18,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 16:09:18,479 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:09:18,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:18,479 INFO L85 PathProgramCache]: Analyzing trace with hash 419778619, now seen corresponding path program 24 times [2022-03-15 16:09:18,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:18,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273687020] [2022-03-15 16:09:18,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:18,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:18,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:18,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273687020] [2022-03-15 16:09:18,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273687020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:18,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788719165] [2022-03-15 16:09:18,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:09:18,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:18,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:18,678 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:18,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 16:09:18,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:09:18,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:18,700 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-15 16:09:18,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:19,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:19,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:19,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:19,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:19,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:19,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:19,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:19,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:19,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:19,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:19,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:19,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:19,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:19,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 28 [2022-03-15 16:09:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:19,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:19,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:19,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:19,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:19,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:19,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:19,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:19,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:19,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:19,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:19,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:19,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:19,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:19,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:19,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:19,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:19,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:19,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:19,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:19,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:09:19,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 138 [2022-03-15 16:09:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:20,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788719165] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:20,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:20,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-15 16:09:20,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824452329] [2022-03-15 16:09:20,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:20,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 16:09:20,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:20,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 16:09:20,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1214, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:09:20,214 INFO L87 Difference]: Start difference. First operand 1126 states and 2531 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:23,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:23,598 INFO L93 Difference]: Finished difference Result 1999 states and 4373 transitions. [2022-03-15 16:09:23,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:09:23,598 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:09:23,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:23,601 INFO L225 Difference]: With dead ends: 1999 [2022-03-15 16:09:23,601 INFO L226 Difference]: Without dead ends: 1946 [2022-03-15 16:09:23,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=828, Invalid=4871, Unknown=1, NotChecked=0, Total=5700 [2022-03-15 16:09:23,602 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 244 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 481 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:23,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 804 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 343 Invalid, 0 Unknown, 481 Unchecked, 0.2s Time] [2022-03-15 16:09:23,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2022-03-15 16:09:23,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1263. [2022-03-15 16:09:23,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1262 states have (on average 2.2575277337559427) internal successors, (2849), 1262 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:23,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 2849 transitions. [2022-03-15 16:09:23,623 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 2849 transitions. Word has length 31 [2022-03-15 16:09:23,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:23,623 INFO L470 AbstractCegarLoop]: Abstraction has 1263 states and 2849 transitions. [2022-03-15 16:09:23,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:23,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 2849 transitions. [2022-03-15 16:09:23,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:09:23,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:23,625 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:23,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:23,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:23,827 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:09:23,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:23,828 INFO L85 PathProgramCache]: Analyzing trace with hash -581010569, now seen corresponding path program 25 times [2022-03-15 16:09:23,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:23,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239233120] [2022-03-15 16:09:23,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:23,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 16:09:24,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:24,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239233120] [2022-03-15 16:09:24,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239233120] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:24,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820244535] [2022-03-15 16:09:24,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:09:24,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:24,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:24,019 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:24,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 16:09:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:24,041 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:09:24,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:24,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:24,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:24,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:24,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:24,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:24,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:24,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:24,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:24,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:24,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:24,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:24,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:24,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:24,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:24,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:24,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:09:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:24,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:25,013 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:09:25,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:09:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:25,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820244535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:25,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:25,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 34 [2022-03-15 16:09:25,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510146163] [2022-03-15 16:09:25,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:25,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:09:25,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:25,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:09:25,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:09:25,258 INFO L87 Difference]: Start difference. First operand 1263 states and 2849 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:26,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:26,647 INFO L93 Difference]: Finished difference Result 2662 states and 5775 transitions. [2022-03-15 16:09:26,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 16:09:26,648 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:09:26,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:26,652 INFO L225 Difference]: With dead ends: 2662 [2022-03-15 16:09:26,652 INFO L226 Difference]: Without dead ends: 2421 [2022-03-15 16:09:26,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=550, Invalid=3482, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 16:09:26,652 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 373 mSDsluCounter, 1845 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:26,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 1471 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1201 Invalid, 0 Unknown, 143 Unchecked, 0.5s Time] [2022-03-15 16:09:26,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2022-03-15 16:09:26,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 1353. [2022-03-15 16:09:26,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1352 states have (on average 2.253698224852071) internal successors, (3047), 1352 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:26,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 3047 transitions. [2022-03-15 16:09:26,674 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 3047 transitions. Word has length 31 [2022-03-15 16:09:26,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:26,674 INFO L470 AbstractCegarLoop]: Abstraction has 1353 states and 3047 transitions. [2022-03-15 16:09:26,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:26,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 3047 transitions. [2022-03-15 16:09:26,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:09:26,676 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:26,676 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:26,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-15 16:09:26,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:26,892 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:09:26,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:26,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1729386449, now seen corresponding path program 26 times [2022-03-15 16:09:26,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:26,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698445840] [2022-03-15 16:09:26,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:26,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:09:27,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:27,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698445840] [2022-03-15 16:09:27,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698445840] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:27,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275984190] [2022-03-15 16:09:27,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:09:27,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:27,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:27,089 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:27,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 16:09:27,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:09:27,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:27,110 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:09:27,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:27,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:27,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:27,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:27,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:27,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:27,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:27,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:27,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:27,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:27,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:27,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:27,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:27,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:09:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:27,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:28,066 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:09:28,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:09:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:28,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275984190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:28,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:28,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 35 [2022-03-15 16:09:28,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114067260] [2022-03-15 16:09:28,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:28,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:09:28,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:28,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:09:28,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:09:28,411 INFO L87 Difference]: Start difference. First operand 1353 states and 3047 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:30,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:30,216 INFO L93 Difference]: Finished difference Result 2884 states and 6295 transitions. [2022-03-15 16:09:30,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-15 16:09:30,216 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:09:30,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:30,221 INFO L225 Difference]: With dead ends: 2884 [2022-03-15 16:09:30,221 INFO L226 Difference]: Without dead ends: 2833 [2022-03-15 16:09:30,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2245 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=874, Invalid=6266, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 16:09:30,222 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 228 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:30,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 1548 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1120 Invalid, 0 Unknown, 177 Unchecked, 0.5s Time] [2022-03-15 16:09:30,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2022-03-15 16:09:30,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 1449. [2022-03-15 16:09:30,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 2.2596685082872927) internal successors, (3272), 1448 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 3272 transitions. [2022-03-15 16:09:30,246 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 3272 transitions. Word has length 31 [2022-03-15 16:09:30,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:30,246 INFO L470 AbstractCegarLoop]: Abstraction has 1449 states and 3272 transitions. [2022-03-15 16:09:30,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:30,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 3272 transitions. [2022-03-15 16:09:30,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:09:30,248 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:30,248 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:30,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:30,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:30,464 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:09:30,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:30,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1228777433, now seen corresponding path program 27 times [2022-03-15 16:09:30,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:30,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267697411] [2022-03-15 16:09:30,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:30,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:30,671 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:30,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267697411] [2022-03-15 16:09:30,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267697411] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:30,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679488305] [2022-03-15 16:09:30,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:09:30,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:30,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:30,673 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:30,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 16:09:30,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:09:30,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:30,693 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:09:30,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:31,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:31,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:31,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:31,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:31,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:31,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:31,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:31,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:31,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:31,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:31,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:31,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:31,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:09:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:31,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:31,648 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:09:31,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:09:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:32,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679488305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:32,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:32,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2022-03-15 16:09:32,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425752293] [2022-03-15 16:09:32,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:32,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:09:32,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:32,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:09:32,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1141, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:09:32,014 INFO L87 Difference]: Start difference. First operand 1449 states and 3272 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:33,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:33,501 INFO L93 Difference]: Finished difference Result 3139 states and 6935 transitions. [2022-03-15 16:09:33,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:09:33,501 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:09:33,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:33,515 INFO L225 Difference]: With dead ends: 3139 [2022-03-15 16:09:33,516 INFO L226 Difference]: Without dead ends: 3061 [2022-03-15 16:09:33,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=679, Invalid=4723, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:09:33,517 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 259 mSDsluCounter, 1794 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:33,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 1676 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1306 Invalid, 0 Unknown, 180 Unchecked, 0.5s Time] [2022-03-15 16:09:33,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3061 states. [2022-03-15 16:09:33,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3061 to 1259. [2022-03-15 16:09:33,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1258 states have (on average 2.237678855325914) internal successors, (2815), 1258 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:33,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 2815 transitions. [2022-03-15 16:09:33,539 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 2815 transitions. Word has length 31 [2022-03-15 16:09:33,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:33,539 INFO L470 AbstractCegarLoop]: Abstraction has 1259 states and 2815 transitions. [2022-03-15 16:09:33,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:33,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 2815 transitions. [2022-03-15 16:09:33,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:09:33,540 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:33,541 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:33,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:33,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:33,756 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:09:33,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:33,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1446151825, now seen corresponding path program 28 times [2022-03-15 16:09:33,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:33,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480415500] [2022-03-15 16:09:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:33,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:33,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:33,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480415500] [2022-03-15 16:09:33,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480415500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:33,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042970639] [2022-03-15 16:09:33,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:09:33,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:33,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:33,973 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:33,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 16:09:33,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:09:33,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:33,995 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:09:33,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:34,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:34,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:34,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:34,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:34,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:34,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:34,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:34,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:34,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:34,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:34,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:34,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:34,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:34,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:34,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:09:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:34,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:34,987 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:09:34,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:09:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:35,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042970639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:35,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:35,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 16:09:35,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458802356] [2022-03-15 16:09:35,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:35,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:09:35,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:35,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:09:35,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1213, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:09:35,313 INFO L87 Difference]: Start difference. First operand 1259 states and 2815 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:36,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:36,358 INFO L93 Difference]: Finished difference Result 2581 states and 5684 transitions. [2022-03-15 16:09:36,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 16:09:36,358 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:09:36,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:36,362 INFO L225 Difference]: With dead ends: 2581 [2022-03-15 16:09:36,362 INFO L226 Difference]: Without dead ends: 2533 [2022-03-15 16:09:36,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=564, Invalid=4128, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 16:09:36,363 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 324 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:36,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 1205 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 809 Invalid, 0 Unknown, 283 Unchecked, 0.4s Time] [2022-03-15 16:09:36,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2022-03-15 16:09:36,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 1226. [2022-03-15 16:09:36,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 2.2310204081632654) internal successors, (2733), 1225 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:36,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 2733 transitions. [2022-03-15 16:09:36,382 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 2733 transitions. Word has length 31 [2022-03-15 16:09:36,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:36,383 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 2733 transitions. [2022-03-15 16:09:36,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:36,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 2733 transitions. [2022-03-15 16:09:36,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:09:36,384 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:36,384 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:36,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:36,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-15 16:09:36,600 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:09:36,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:36,600 INFO L85 PathProgramCache]: Analyzing trace with hash 973292475, now seen corresponding path program 29 times [2022-03-15 16:09:36,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:36,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073367330] [2022-03-15 16:09:36,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:36,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:36,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:36,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073367330] [2022-03-15 16:09:36,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073367330] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:36,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060077691] [2022-03-15 16:09:36,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:09:36,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:36,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:36,823 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:36,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 16:09:36,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:09:36,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:36,844 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:09:36,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:37,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:37,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:37,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:37,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:37,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:37,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:37,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:37,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:37,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:37,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:37,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:37,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:37,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:09:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:37,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:37,816 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:09:37,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:09:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:38,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060077691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:38,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:38,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 16:09:38,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909345984] [2022-03-15 16:09:38,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:38,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:09:38,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:38,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:09:38,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:09:38,234 INFO L87 Difference]: Start difference. First operand 1226 states and 2733 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:39,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:39,062 INFO L93 Difference]: Finished difference Result 2552 states and 5597 transitions. [2022-03-15 16:09:39,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:09:39,062 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:09:39,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:39,066 INFO L225 Difference]: With dead ends: 2552 [2022-03-15 16:09:39,066 INFO L226 Difference]: Without dead ends: 2515 [2022-03-15 16:09:39,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=413, Invalid=3127, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 16:09:39,067 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 306 mSDsluCounter, 1306 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:39,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 1272 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 832 Invalid, 0 Unknown, 139 Unchecked, 0.4s Time] [2022-03-15 16:09:39,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2022-03-15 16:09:39,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 1235. [2022-03-15 16:09:39,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1234 states have (on average 2.2236628849270663) internal successors, (2744), 1234 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:39,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 2744 transitions. [2022-03-15 16:09:39,086 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 2744 transitions. Word has length 31 [2022-03-15 16:09:39,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:39,086 INFO L470 AbstractCegarLoop]: Abstraction has 1235 states and 2744 transitions. [2022-03-15 16:09:39,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:39,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 2744 transitions. [2022-03-15 16:09:39,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:09:39,088 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:39,088 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:39,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:39,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:39,304 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:09:39,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:39,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1654123481, now seen corresponding path program 30 times [2022-03-15 16:09:39,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:39,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190765118] [2022-03-15 16:09:39,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:39,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:39,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:39,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190765118] [2022-03-15 16:09:39,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190765118] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:39,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934223899] [2022-03-15 16:09:39,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:09:39,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:39,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:39,503 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:39,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 16:09:39,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:09:39,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:39,523 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:09:39,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:39,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:39,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:39,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:39,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:39,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:39,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:39,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:39,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:39,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:39,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:39,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:39,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:39,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:09:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:39,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:40,480 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:09:40,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:09:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:40,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934223899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:40,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:40,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 16:09:40,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218672552] [2022-03-15 16:09:40,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:40,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:09:40,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:40,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:09:40,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1188, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:09:40,723 INFO L87 Difference]: Start difference. First operand 1235 states and 2744 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:43,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:43,203 INFO L93 Difference]: Finished difference Result 3680 states and 7819 transitions. [2022-03-15 16:09:43,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-15 16:09:43,203 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:09:43,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:43,208 INFO L225 Difference]: With dead ends: 3680 [2022-03-15 16:09:43,208 INFO L226 Difference]: Without dead ends: 3318 [2022-03-15 16:09:43,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3017 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1029, Invalid=7901, Unknown=0, NotChecked=0, Total=8930 [2022-03-15 16:09:43,210 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 567 mSDsluCounter, 1840 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:43,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 1506 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1205 Invalid, 0 Unknown, 80 Unchecked, 0.6s Time] [2022-03-15 16:09:43,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2022-03-15 16:09:43,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 1515. [2022-03-15 16:09:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 2.249669749009247) internal successors, (3406), 1514 states have internal predecessors, (3406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 3406 transitions. [2022-03-15 16:09:43,249 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 3406 transitions. Word has length 31 [2022-03-15 16:09:43,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:43,249 INFO L470 AbstractCegarLoop]: Abstraction has 1515 states and 3406 transitions. [2022-03-15 16:09:43,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:43,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 3406 transitions. [2022-03-15 16:09:43,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:09:43,251 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:43,251 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:43,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:43,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:43,459 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:09:43,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:43,460 INFO L85 PathProgramCache]: Analyzing trace with hash -831055813, now seen corresponding path program 31 times [2022-03-15 16:09:43,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:43,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29767457] [2022-03-15 16:09:43,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:43,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:43,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:43,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29767457] [2022-03-15 16:09:43,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29767457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:43,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924405596] [2022-03-15 16:09:43,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:09:43,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:43,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:43,653 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:43,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 16:09:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:43,673 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:09:43,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:44,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:44,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:44,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:44,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:44,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:44,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:44,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:44,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:44,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:44,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:44,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:44,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:44,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:09:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:44,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:44,634 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:09:44,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:09:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:44,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924405596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:44,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:44,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 16:09:44,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757248403] [2022-03-15 16:09:44,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:44,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:09:44,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:44,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:09:44,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:09:44,957 INFO L87 Difference]: Start difference. First operand 1515 states and 3406 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:46,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:46,793 INFO L93 Difference]: Finished difference Result 3260 states and 7163 transitions. [2022-03-15 16:09:46,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 16:09:46,793 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:09:46,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:46,797 INFO L225 Difference]: With dead ends: 3260 [2022-03-15 16:09:46,797 INFO L226 Difference]: Without dead ends: 3157 [2022-03-15 16:09:46,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=765, Invalid=6375, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 16:09:46,798 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 236 mSDsluCounter, 1598 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 1499 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:46,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 1499 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1070 Invalid, 0 Unknown, 185 Unchecked, 0.5s Time] [2022-03-15 16:09:46,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2022-03-15 16:09:46,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 1923. [2022-03-15 16:09:46,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1923 states, 1922 states have (on average 2.2627471383975024) internal successors, (4349), 1922 states have internal predecessors, (4349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:46,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 4349 transitions. [2022-03-15 16:09:46,825 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 4349 transitions. Word has length 31 [2022-03-15 16:09:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:46,825 INFO L470 AbstractCegarLoop]: Abstraction has 1923 states and 4349 transitions. [2022-03-15 16:09:46,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:46,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 4349 transitions. [2022-03-15 16:09:46,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:09:46,828 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:46,828 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:46,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-15 16:09:47,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-15 16:09:47,043 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:09:47,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:47,044 INFO L85 PathProgramCache]: Analyzing trace with hash -613681421, now seen corresponding path program 32 times [2022-03-15 16:09:47,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:47,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006185309] [2022-03-15 16:09:47,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:47,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:47,256 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:47,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006185309] [2022-03-15 16:09:47,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006185309] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:47,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597800945] [2022-03-15 16:09:47,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:09:47,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:47,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:47,257 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:47,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 16:09:47,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:09:47,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:47,280 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:09:47,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:47,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:47,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:47,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:47,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:47,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:47,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:47,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:47,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:47,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:47,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:47,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:47,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:47,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:09:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:47,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:48,273 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:09:48,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:09:48,570 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:48,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597800945] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:48,571 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:48,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 16:09:48,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658983059] [2022-03-15 16:09:48,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:48,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:09:48,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:48,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:09:48,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:09:48,572 INFO L87 Difference]: Start difference. First operand 1923 states and 4349 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:49,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:49,273 INFO L93 Difference]: Finished difference Result 2391 states and 5326 transitions. [2022-03-15 16:09:49,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:09:49,273 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:09:49,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:49,276 INFO L225 Difference]: With dead ends: 2391 [2022-03-15 16:09:49,276 INFO L226 Difference]: Without dead ends: 2373 [2022-03-15 16:09:49,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=325, Invalid=2431, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 16:09:49,276 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 150 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:49,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1032 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 447 Invalid, 0 Unknown, 185 Unchecked, 0.2s Time] [2022-03-15 16:09:49,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2022-03-15 16:09:49,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 2031. [2022-03-15 16:09:49,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 2.2699507389162563) internal successors, (4608), 2030 states have internal predecessors, (4608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:49,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 4608 transitions. [2022-03-15 16:09:49,299 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 4608 transitions. Word has length 31 [2022-03-15 16:09:49,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:49,299 INFO L470 AbstractCegarLoop]: Abstraction has 2031 states and 4608 transitions. [2022-03-15 16:09:49,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:49,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 4608 transitions. [2022-03-15 16:09:49,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:09:49,301 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:49,301 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:49,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:49,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-15 16:09:49,515 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:09:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:49,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1614470609, now seen corresponding path program 33 times [2022-03-15 16:09:49,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:49,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688941433] [2022-03-15 16:09:49,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:49,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:09:49,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:49,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688941433] [2022-03-15 16:09:49,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688941433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:49,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610369372] [2022-03-15 16:09:49,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:09:49,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:49,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:49,705 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:49,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 16:09:49,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:09:49,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:49,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:09:49,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:50,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:50,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:50,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:50,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:50,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:50,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:50,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:50,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:50,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:50,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:50,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:50,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:50,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:50,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:50,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:50,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:09:50,188 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:50,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:50,669 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:09:50,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:09:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:50,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610369372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:50,992 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:50,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 35 [2022-03-15 16:09:50,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522755936] [2022-03-15 16:09:50,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:50,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:09:50,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:50,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:09:50,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:09:50,993 INFO L87 Difference]: Start difference. First operand 2031 states and 4608 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:53,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:53,218 INFO L93 Difference]: Finished difference Result 4562 states and 9939 transitions. [2022-03-15 16:09:53,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-15 16:09:53,219 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:09:53,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:53,224 INFO L225 Difference]: With dead ends: 4562 [2022-03-15 16:09:53,224 INFO L226 Difference]: Without dead ends: 4171 [2022-03-15 16:09:53,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2460 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=925, Invalid=6731, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 16:09:53,225 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 603 mSDsluCounter, 1903 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 1543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:53,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 1510 Invalid, 1543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1298 Invalid, 0 Unknown, 117 Unchecked, 0.6s Time] [2022-03-15 16:09:53,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2022-03-15 16:09:53,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 2193. [2022-03-15 16:09:53,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2193 states, 2192 states have (on average 2.2650547445255476) internal successors, (4965), 2192 states have internal predecessors, (4965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2193 states to 2193 states and 4965 transitions. [2022-03-15 16:09:53,263 INFO L78 Accepts]: Start accepts. Automaton has 2193 states and 4965 transitions. Word has length 31 [2022-03-15 16:09:53,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:53,264 INFO L470 AbstractCegarLoop]: Abstraction has 2193 states and 4965 transitions. [2022-03-15 16:09:53,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:53,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2193 states and 4965 transitions. [2022-03-15 16:09:53,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:09:53,266 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:53,266 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:53,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:53,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 16:09:53,481 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:09:53,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:53,482 INFO L85 PathProgramCache]: Analyzing trace with hash 195317393, now seen corresponding path program 34 times [2022-03-15 16:09:53,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:53,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905658279] [2022-03-15 16:09:53,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:53,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:53,714 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:53,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:53,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905658279] [2022-03-15 16:09:53,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905658279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:53,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830973151] [2022-03-15 16:09:53,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:09:53,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:53,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:53,716 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:53,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 16:09:53,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:09:53,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:53,736 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:09:53,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:54,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:54,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:54,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:54,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:54,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:54,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:54,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:54,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:54,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:54,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:54,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:54,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:54,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:09:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:54,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:54,701 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:09:54,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:09:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:55,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830973151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:55,034 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:55,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2022-03-15 16:09:55,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037525280] [2022-03-15 16:09:55,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:55,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:09:55,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:55,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:09:55,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:09:55,035 INFO L87 Difference]: Start difference. First operand 2193 states and 4965 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:57,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:09:57,264 INFO L93 Difference]: Finished difference Result 4248 states and 9369 transitions. [2022-03-15 16:09:57,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-15 16:09:57,264 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:09:57,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:09:57,269 INFO L225 Difference]: With dead ends: 4248 [2022-03-15 16:09:57,269 INFO L226 Difference]: Without dead ends: 4119 [2022-03-15 16:09:57,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1072, Invalid=7670, Unknown=0, NotChecked=0, Total=8742 [2022-03-15 16:09:57,270 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 438 mSDsluCounter, 1485 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:09:57,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 1346 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1067 Invalid, 0 Unknown, 186 Unchecked, 0.5s Time] [2022-03-15 16:09:57,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4119 states. [2022-03-15 16:09:57,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4119 to 2245. [2022-03-15 16:09:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 2.2615864527629235) internal successors, (5075), 2244 states have internal predecessors, (5075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:57,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 5075 transitions. [2022-03-15 16:09:57,303 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 5075 transitions. Word has length 31 [2022-03-15 16:09:57,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:09:57,303 INFO L470 AbstractCegarLoop]: Abstraction has 2245 states and 5075 transitions. [2022-03-15 16:09:57,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:09:57,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 5075 transitions. [2022-03-15 16:09:57,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:09:57,305 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:09:57,305 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:09:57,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 16:09:57,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 16:09:57,521 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:09:57,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:09:57,521 INFO L85 PathProgramCache]: Analyzing trace with hash 412691785, now seen corresponding path program 35 times [2022-03-15 16:09:57,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:09:57,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149879490] [2022-03-15 16:09:57,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:09:57,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:09:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:09:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:57,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:09:57,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149879490] [2022-03-15 16:09:57,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149879490] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:09:57,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280642006] [2022-03-15 16:09:57,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:09:57,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:09:57,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:09:57,737 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:09:57,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 16:09:57,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:09:57,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:09:57,758 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:09:57,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:09:58,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:58,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:58,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:58,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:58,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:58,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:58,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:58,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:58,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:58,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:58,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:09:58,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:09:58,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:09:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:58,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:09:58,748 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:09:58,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:09:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:09:59,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280642006] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:09:59,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:09:59,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 16:09:59,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188642999] [2022-03-15 16:09:59,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:09:59,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:09:59,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:09:59,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:09:59,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:09:59,049 INFO L87 Difference]: Start difference. First operand 2245 states and 5075 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:00,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:00,847 INFO L93 Difference]: Finished difference Result 4020 states and 8941 transitions. [2022-03-15 16:10:00,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 16:10:00,848 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:10:00,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:00,852 INFO L225 Difference]: With dead ends: 4020 [2022-03-15 16:10:00,852 INFO L226 Difference]: Without dead ends: 3928 [2022-03-15 16:10:00,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=829, Invalid=6143, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 16:10:00,853 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 371 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:00,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 1036 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 763 Invalid, 0 Unknown, 246 Unchecked, 0.4s Time] [2022-03-15 16:10:00,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3928 states. [2022-03-15 16:10:00,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3928 to 1783. [2022-03-15 16:10:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 2.230078563411897) internal successors, (3974), 1782 states have internal predecessors, (3974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:00,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 3974 transitions. [2022-03-15 16:10:00,881 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 3974 transitions. Word has length 31 [2022-03-15 16:10:00,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:00,881 INFO L470 AbstractCegarLoop]: Abstraction has 1783 states and 3974 transitions. [2022-03-15 16:10:00,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:00,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 3974 transitions. [2022-03-15 16:10:00,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:10:00,882 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:00,882 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:00,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-15 16:10:01,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:01,083 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:10:01,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:01,083 INFO L85 PathProgramCache]: Analyzing trace with hash -60167565, now seen corresponding path program 36 times [2022-03-15 16:10:01,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:01,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530663324] [2022-03-15 16:10:01,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:01,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:01,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:01,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530663324] [2022-03-15 16:10:01,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530663324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:01,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897080757] [2022-03-15 16:10:01,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:10:01,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:01,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:01,290 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:01,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 16:10:01,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:10:01,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:01,311 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:10:01,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:01,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:01,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:01,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:01,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:01,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:01,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:01,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:01,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:01,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:01,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:01,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:01,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:01,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:10:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:01,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:02,282 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:10:02,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:10:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:02,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897080757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:02,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:02,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 16:10:02,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784813697] [2022-03-15 16:10:02,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:02,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:10:02,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:02,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:10:02,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:10:02,560 INFO L87 Difference]: Start difference. First operand 1783 states and 3974 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:03,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:03,998 INFO L93 Difference]: Finished difference Result 3428 states and 7515 transitions. [2022-03-15 16:10:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 16:10:03,998 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:10:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:04,002 INFO L225 Difference]: With dead ends: 3428 [2022-03-15 16:10:04,002 INFO L226 Difference]: Without dead ends: 3391 [2022-03-15 16:10:04,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=720, Invalid=5286, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 16:10:04,003 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 338 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:04,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 1057 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 714 Invalid, 0 Unknown, 278 Unchecked, 0.3s Time] [2022-03-15 16:10:04,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3391 states. [2022-03-15 16:10:04,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3391 to 1789. [2022-03-15 16:10:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1788 states have (on average 2.228187919463087) internal successors, (3984), 1788 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:04,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 3984 transitions. [2022-03-15 16:10:04,028 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 3984 transitions. Word has length 31 [2022-03-15 16:10:04,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:04,028 INFO L470 AbstractCegarLoop]: Abstraction has 1789 states and 3984 transitions. [2022-03-15 16:10:04,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:04,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 3984 transitions. [2022-03-15 16:10:04,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:10:04,029 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:04,029 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:04,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-15 16:10:04,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-15 16:10:04,239 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:10:04,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:04,239 INFO L85 PathProgramCache]: Analyzing trace with hash 472265399, now seen corresponding path program 37 times [2022-03-15 16:10:04,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:04,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187140731] [2022-03-15 16:10:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:04,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:10:04,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:04,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187140731] [2022-03-15 16:10:04,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187140731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:04,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127862315] [2022-03-15 16:10:04,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:10:04,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:04,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:04,438 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:04,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 16:10:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:04,459 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:10:04,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:04,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:04,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:04,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:04,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:04,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:04,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:04,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:04,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:04,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:04,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:04,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:04,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:04,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:04,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:10:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:04,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:05,402 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:10:05,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:10:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:05,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127862315] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:05,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:05,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 35 [2022-03-15 16:10:05,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118772584] [2022-03-15 16:10:05,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:05,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:10:05,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:05,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:10:05,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:10:05,862 INFO L87 Difference]: Start difference. First operand 1789 states and 3984 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:07,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:07,412 INFO L93 Difference]: Finished difference Result 3241 states and 7044 transitions. [2022-03-15 16:10:07,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 16:10:07,412 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:10:07,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:07,416 INFO L225 Difference]: With dead ends: 3241 [2022-03-15 16:10:07,416 INFO L226 Difference]: Without dead ends: 3039 [2022-03-15 16:10:07,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=599, Invalid=4231, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 16:10:07,417 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 460 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:07,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 1329 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1141 Invalid, 0 Unknown, 89 Unchecked, 0.5s Time] [2022-03-15 16:10:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2022-03-15 16:10:07,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 1873. [2022-03-15 16:10:07,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 2.2254273504273505) internal successors, (4166), 1872 states have internal predecessors, (4166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:07,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 4166 transitions. [2022-03-15 16:10:07,446 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 4166 transitions. Word has length 31 [2022-03-15 16:10:07,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:07,446 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 4166 transitions. [2022-03-15 16:10:07,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:07,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 4166 transitions. [2022-03-15 16:10:07,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:10:07,448 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:07,448 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:07,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-15 16:10:07,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-15 16:10:07,649 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:10:07,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:07,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2012913895, now seen corresponding path program 38 times [2022-03-15 16:10:07,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:07,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186989816] [2022-03-15 16:10:07,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:07,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:07,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:07,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186989816] [2022-03-15 16:10:07,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186989816] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:07,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572999013] [2022-03-15 16:10:07,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:10:07,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:07,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:07,868 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:07,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 16:10:07,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:10:07,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:07,889 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:10:07,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:08,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:08,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:08,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:08,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:08,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:08,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:08,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:08,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:08,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:08,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:08,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:08,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:08,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:08,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:08,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:10:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:08,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:08,850 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:10:08,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:10:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:09,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572999013] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:09,241 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:09,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2022-03-15 16:10:09,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784169703] [2022-03-15 16:10:09,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:09,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:10:09,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:09,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:10:09,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:10:09,242 INFO L87 Difference]: Start difference. First operand 1873 states and 4166 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:10,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:10,882 INFO L93 Difference]: Finished difference Result 3127 states and 6815 transitions. [2022-03-15 16:10:10,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:10:10,882 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:10:10,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:10,885 INFO L225 Difference]: With dead ends: 3127 [2022-03-15 16:10:10,886 INFO L226 Difference]: Without dead ends: 3032 [2022-03-15 16:10:10,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1804 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=799, Invalid=5363, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 16:10:10,886 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 352 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:10,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 1330 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1052 Invalid, 0 Unknown, 244 Unchecked, 0.5s Time] [2022-03-15 16:10:10,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2022-03-15 16:10:10,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 1880. [2022-03-15 16:10:10,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1879 states have (on average 2.226184140500266) internal successors, (4183), 1879 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:10,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 4183 transitions. [2022-03-15 16:10:10,911 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 4183 transitions. Word has length 31 [2022-03-15 16:10:10,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:10,912 INFO L470 AbstractCegarLoop]: Abstraction has 1880 states and 4183 transitions. [2022-03-15 16:10:10,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:10,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 4183 transitions. [2022-03-15 16:10:10,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:10:10,913 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:10,913 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:10,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-15 16:10:11,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-15 16:10:11,115 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:10:11,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:11,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1795539503, now seen corresponding path program 39 times [2022-03-15 16:10:11,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:11,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520641985] [2022-03-15 16:10:11,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:11,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:11,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:11,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520641985] [2022-03-15 16:10:11,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520641985] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:11,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599869784] [2022-03-15 16:10:11,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:10:11,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:11,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:11,330 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:11,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 16:10:11,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:10:11,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:11,351 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:10:11,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:11,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:11,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:11,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:11,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:11,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:11,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:11,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:11,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:11,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:11,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:11,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:11,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:11,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:11,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:11,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:10:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:11,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:12,389 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:10:12,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:10:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:12,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599869784] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:12,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:12,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 16:10:12,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523846255] [2022-03-15 16:10:12,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:12,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:10:12,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:12,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:10:12,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1197, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:10:12,723 INFO L87 Difference]: Start difference. First operand 1880 states and 4183 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:14,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:14,251 INFO L93 Difference]: Finished difference Result 3131 states and 6832 transitions. [2022-03-15 16:10:14,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:10:14,251 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:10:14,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:14,255 INFO L225 Difference]: With dead ends: 3131 [2022-03-15 16:10:14,255 INFO L226 Difference]: Without dead ends: 3080 [2022-03-15 16:10:14,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=693, Invalid=5007, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 16:10:14,256 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 295 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1501 SdHoareTripleChecker+Invalid, 1504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:14,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 1501 Invalid, 1504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1223 Invalid, 0 Unknown, 202 Unchecked, 0.5s Time] [2022-03-15 16:10:14,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3080 states. [2022-03-15 16:10:14,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3080 to 1914. [2022-03-15 16:10:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 2.226868792472556) internal successors, (4260), 1913 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:14,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 4260 transitions. [2022-03-15 16:10:14,279 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 4260 transitions. Word has length 31 [2022-03-15 16:10:14,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:14,279 INFO L470 AbstractCegarLoop]: Abstraction has 1914 states and 4260 transitions. [2022-03-15 16:10:14,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 4260 transitions. [2022-03-15 16:10:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:10:14,281 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:14,281 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:14,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-15 16:10:14,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:14,482 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:10:14,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:14,482 INFO L85 PathProgramCache]: Analyzing trace with hash 2026568443, now seen corresponding path program 40 times [2022-03-15 16:10:14,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:14,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508581730] [2022-03-15 16:10:14,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:14,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:14,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:14,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508581730] [2022-03-15 16:10:14,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508581730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:14,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186880131] [2022-03-15 16:10:14,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:10:14,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:14,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:14,688 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:14,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 16:10:14,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:10:14,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:14,708 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:10:14,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:15,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:15,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:15,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:15,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:15,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:15,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:15,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:15,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:15,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:15,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:15,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:15,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:15,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:15,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:15,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:10:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:15,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:15,728 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:10:15,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:10:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:16,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186880131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:16,165 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:16,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 16:10:16,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897323599] [2022-03-15 16:10:16,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:16,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:10:16,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:16,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:10:16,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:10:16,166 INFO L87 Difference]: Start difference. First operand 1914 states and 4260 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:17,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:17,528 INFO L93 Difference]: Finished difference Result 2916 states and 6399 transitions. [2022-03-15 16:10:17,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 16:10:17,528 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:10:17,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:17,532 INFO L225 Difference]: With dead ends: 2916 [2022-03-15 16:10:17,532 INFO L226 Difference]: Without dead ends: 2879 [2022-03-15 16:10:17,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=747, Invalid=4953, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 16:10:17,533 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 306 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:17,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 1129 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 640 Invalid, 0 Unknown, 270 Unchecked, 0.3s Time] [2022-03-15 16:10:17,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2022-03-15 16:10:17,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2008. [2022-03-15 16:10:17,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 2.2316890881913305) internal successors, (4479), 2007 states have internal predecessors, (4479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:17,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 4479 transitions. [2022-03-15 16:10:17,556 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 4479 transitions. Word has length 31 [2022-03-15 16:10:17,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:17,556 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 4479 transitions. [2022-03-15 16:10:17,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:17,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 4479 transitions. [2022-03-15 16:10:17,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:10:17,558 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:17,558 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:17,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-15 16:10:17,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:17,759 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:10:17,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:17,760 INFO L85 PathProgramCache]: Analyzing trace with hash 469961651, now seen corresponding path program 41 times [2022-03-15 16:10:17,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:17,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002802217] [2022-03-15 16:10:17,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:17,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:18,005 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:18,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002802217] [2022-03-15 16:10:18,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002802217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:18,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113356367] [2022-03-15 16:10:18,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:10:18,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:18,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:18,007 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:18,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 16:10:18,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:10:18,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:18,029 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:10:18,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:18,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:18,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:18,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:18,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:18,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:18,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:18,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:18,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:18,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:18,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:18,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:18,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:18,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:10:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:18,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:19,046 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:10:19,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:10:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:19,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113356367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:19,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:19,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 16:10:19,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943959922] [2022-03-15 16:10:19,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:19,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:10:19,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:19,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:10:19,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:10:19,419 INFO L87 Difference]: Start difference. First operand 2008 states and 4479 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:20,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:20,323 INFO L93 Difference]: Finished difference Result 3180 states and 6988 transitions. [2022-03-15 16:10:20,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:10:20,324 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:10:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:20,327 INFO L225 Difference]: With dead ends: 3180 [2022-03-15 16:10:20,327 INFO L226 Difference]: Without dead ends: 3134 [2022-03-15 16:10:20,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=514, Invalid=3392, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 16:10:20,328 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 286 mSDsluCounter, 1266 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 371 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:20,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 1225 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 782 Invalid, 0 Unknown, 371 Unchecked, 0.3s Time] [2022-03-15 16:10:20,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2022-03-15 16:10:20,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 2031. [2022-03-15 16:10:20,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 2.2305418719211825) internal successors, (4528), 2030 states have internal predecessors, (4528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:20,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 4528 transitions. [2022-03-15 16:10:20,354 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 4528 transitions. Word has length 31 [2022-03-15 16:10:20,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:20,354 INFO L470 AbstractCegarLoop]: Abstraction has 2031 states and 4528 transitions. [2022-03-15 16:10:20,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:20,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 4528 transitions. [2022-03-15 16:10:20,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:10:20,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:20,356 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:20,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-15 16:10:20,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-15 16:10:20,557 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:10:20,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:20,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1335222019, now seen corresponding path program 42 times [2022-03-15 16:10:20,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:20,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934654867] [2022-03-15 16:10:20,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:20,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:20,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:20,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934654867] [2022-03-15 16:10:20,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934654867] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:20,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039771894] [2022-03-15 16:10:20,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:10:20,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:20,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:20,765 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:20,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 16:10:20,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:10:20,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:20,792 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:10:20,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:21,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:21,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:21,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:21,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:21,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:21,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:21,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:21,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:21,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:21,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:21,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:10:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:21,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:21,711 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:10:21,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:10:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:22,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039771894] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:22,116 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:22,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-15 16:10:22,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535396727] [2022-03-15 16:10:22,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:22,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:10:22,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:22,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:10:22,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:10:22,117 INFO L87 Difference]: Start difference. First operand 2031 states and 4528 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:24,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:24,577 INFO L93 Difference]: Finished difference Result 5357 states and 11626 transitions. [2022-03-15 16:10:24,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-15 16:10:24,577 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:10:24,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:24,584 INFO L225 Difference]: With dead ends: 5357 [2022-03-15 16:10:24,584 INFO L226 Difference]: Without dead ends: 4937 [2022-03-15 16:10:24,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3014 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1091, Invalid=8221, Unknown=0, NotChecked=0, Total=9312 [2022-03-15 16:10:24,585 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 578 mSDsluCounter, 1961 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:24,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 1585 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1247 Invalid, 0 Unknown, 121 Unchecked, 0.6s Time] [2022-03-15 16:10:24,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2022-03-15 16:10:24,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 2202. [2022-03-15 16:10:24,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 2.230349840981372) internal successors, (4909), 2201 states have internal predecessors, (4909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:24,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 4909 transitions. [2022-03-15 16:10:24,621 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 4909 transitions. Word has length 31 [2022-03-15 16:10:24,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:24,621 INFO L470 AbstractCegarLoop]: Abstraction has 2202 states and 4909 transitions. [2022-03-15 16:10:24,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:24,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 4909 transitions. [2022-03-15 16:10:24,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:10:24,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:24,624 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:24,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-15 16:10:24,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-15 16:10:24,824 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:10:24,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:24,824 INFO L85 PathProgramCache]: Analyzing trace with hash -932582883, now seen corresponding path program 43 times [2022-03-15 16:10:24,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:24,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841684493] [2022-03-15 16:10:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:24,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:25,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:25,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841684493] [2022-03-15 16:10:25,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841684493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:25,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871533863] [2022-03-15 16:10:25,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:10:25,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:25,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:25,044 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:25,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 16:10:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:25,067 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:10:25,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:25,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:25,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:25,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:25,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:25,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:25,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:25,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:25,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:25,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:25,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:25,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:10:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:25,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:26,013 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:10:26,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:10:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:26,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871533863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:26,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:26,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-15 16:10:26,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806109336] [2022-03-15 16:10:26,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:26,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:10:26,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:26,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:10:26,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:10:26,337 INFO L87 Difference]: Start difference. First operand 2202 states and 4909 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:28,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:28,123 INFO L93 Difference]: Finished difference Result 4326 states and 9605 transitions. [2022-03-15 16:10:28,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-15 16:10:28,124 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:10:28,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:28,129 INFO L225 Difference]: With dead ends: 4326 [2022-03-15 16:10:28,129 INFO L226 Difference]: Without dead ends: 4175 [2022-03-15 16:10:28,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2259 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=916, Invalid=6740, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 16:10:28,130 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 411 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:28,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 1157 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 831 Invalid, 0 Unknown, 165 Unchecked, 0.4s Time] [2022-03-15 16:10:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4175 states. [2022-03-15 16:10:28,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4175 to 2260. [2022-03-15 16:10:28,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 2259 states have (on average 2.2217795484727754) internal successors, (5019), 2259 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:28,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 5019 transitions. [2022-03-15 16:10:28,165 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 5019 transitions. Word has length 31 [2022-03-15 16:10:28,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:28,165 INFO L470 AbstractCegarLoop]: Abstraction has 2260 states and 5019 transitions. [2022-03-15 16:10:28,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:28,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 5019 transitions. [2022-03-15 16:10:28,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:10:28,168 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:28,168 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:28,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-15 16:10:28,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-15 16:10:28,368 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:10:28,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:28,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1933372071, now seen corresponding path program 44 times [2022-03-15 16:10:28,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:28,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813205872] [2022-03-15 16:10:28,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:28,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:28,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:28,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813205872] [2022-03-15 16:10:28,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813205872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:28,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414740652] [2022-03-15 16:10:28,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:10:28,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:28,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:28,601 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:28,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:10:28,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:28,623 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:10:28,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:28,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 16:10:29,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:29,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:29,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:29,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:29,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:29,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:29,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:29,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:29,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:29,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:29,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:29,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:10:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:29,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:29,560 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:10:29,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:10:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:29,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414740652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:29,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:29,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 35 [2022-03-15 16:10:29,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679882] [2022-03-15 16:10:29,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:29,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:10:29,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:29,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:10:29,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1071, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:10:29,858 INFO L87 Difference]: Start difference. First operand 2260 states and 5019 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:32,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:32,273 INFO L93 Difference]: Finished difference Result 5306 states and 11490 transitions. [2022-03-15 16:10:32,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-15 16:10:32,273 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:10:32,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:32,279 INFO L225 Difference]: With dead ends: 5306 [2022-03-15 16:10:32,279 INFO L226 Difference]: Without dead ends: 4883 [2022-03-15 16:10:32,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2657 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1003, Invalid=7369, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 16:10:32,280 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 677 mSDsluCounter, 2136 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 1751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:32,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 1701 Invalid, 1751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1494 Invalid, 0 Unknown, 101 Unchecked, 0.7s Time] [2022-03-15 16:10:32,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4883 states. [2022-03-15 16:10:32,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4883 to 2302. [2022-03-15 16:10:32,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2301 states have (on average 2.215993046501521) internal successors, (5099), 2301 states have internal predecessors, (5099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:32,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 5099 transitions. [2022-03-15 16:10:32,314 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 5099 transitions. Word has length 31 [2022-03-15 16:10:32,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:32,314 INFO L470 AbstractCegarLoop]: Abstraction has 2302 states and 5099 transitions. [2022-03-15 16:10:32,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:32,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 5099 transitions. [2022-03-15 16:10:32,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:10:32,316 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:32,317 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:32,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-15 16:10:32,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:32,517 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:10:32,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:32,517 INFO L85 PathProgramCache]: Analyzing trace with hash 93790323, now seen corresponding path program 45 times [2022-03-15 16:10:32,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:32,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378045662] [2022-03-15 16:10:32,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:32,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:32,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:32,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378045662] [2022-03-15 16:10:32,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378045662] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:32,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470573000] [2022-03-15 16:10:32,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:10:32,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:32,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:32,743 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:32,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:10:32,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:32,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 16:10:32,768 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-15 16:10:32,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:33,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:33,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:33,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:33,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:33,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:33,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:33,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:33,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:33,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:33,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:33,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:33,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:33,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 28 [2022-03-15 16:10:33,408 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:33,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:33,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:33,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:33,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:33,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:33,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:33,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:33,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:33,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:33,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:33,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:33,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:33,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:33,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:33,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:33,991 INFO L353 Elim1Store]: treesize reduction 40, result has 72.8 percent of original size [2022-03-15 16:10:33,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 74 treesize of output 140 [2022-03-15 16:10:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:34,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470573000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:34,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:34,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-15 16:10:34,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265413761] [2022-03-15 16:10:34,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:34,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 16:10:34,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:34,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 16:10:34,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1210, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:10:34,329 INFO L87 Difference]: Start difference. First operand 2302 states and 5099 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:35,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:35,910 INFO L93 Difference]: Finished difference Result 3506 states and 7610 transitions. [2022-03-15 16:10:35,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 16:10:35,910 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:10:35,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:35,915 INFO L225 Difference]: With dead ends: 3506 [2022-03-15 16:10:35,915 INFO L226 Difference]: Without dead ends: 3384 [2022-03-15 16:10:35,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=990, Invalid=5330, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 16:10:35,916 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 330 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 506 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:35,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 963 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 487 Invalid, 0 Unknown, 506 Unchecked, 0.2s Time] [2022-03-15 16:10:35,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2022-03-15 16:10:35,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 2450. [2022-03-15 16:10:35,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2450 states, 2449 states have (on average 2.222539812168232) internal successors, (5443), 2449 states have internal predecessors, (5443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2450 states to 2450 states and 5443 transitions. [2022-03-15 16:10:35,960 INFO L78 Accepts]: Start accepts. Automaton has 2450 states and 5443 transitions. Word has length 31 [2022-03-15 16:10:35,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:35,960 INFO L470 AbstractCegarLoop]: Abstraction has 2450 states and 5443 transitions. [2022-03-15 16:10:35,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:35,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2450 states and 5443 transitions. [2022-03-15 16:10:35,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:10:35,962 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:35,962 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:35,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-15 16:10:36,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:36,163 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:10:36,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:36,163 INFO L85 PathProgramCache]: Analyzing trace with hash -379069027, now seen corresponding path program 46 times [2022-03-15 16:10:36,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:36,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800067141] [2022-03-15 16:10:36,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:36,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:36,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:36,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800067141] [2022-03-15 16:10:36,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800067141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:36,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370200474] [2022-03-15 16:10:36,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:10:36,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:36,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:36,383 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:36,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 16:10:36,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:10:36,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:36,404 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:10:36,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:36,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:36,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:36,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:36,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:36,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:36,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:36,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:36,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:36,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:36,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:36,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:36,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:10:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:36,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:37,337 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:10:37,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:10:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:37,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370200474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:37,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:37,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-15 16:10:37,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513688370] [2022-03-15 16:10:37,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:37,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:10:37,617 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:37,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:10:37,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1149, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:10:37,617 INFO L87 Difference]: Start difference. First operand 2450 states and 5443 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:38,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:38,864 INFO L93 Difference]: Finished difference Result 3893 states and 8525 transitions. [2022-03-15 16:10:38,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 16:10:38,864 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:10:38,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:38,870 INFO L225 Difference]: With dead ends: 3893 [2022-03-15 16:10:38,870 INFO L226 Difference]: Without dead ends: 3849 [2022-03-15 16:10:38,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=614, Invalid=4642, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 16:10:38,871 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 334 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:38,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 1086 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 702 Invalid, 0 Unknown, 305 Unchecked, 0.3s Time] [2022-03-15 16:10:38,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3849 states. [2022-03-15 16:10:38,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3849 to 2636. [2022-03-15 16:10:38,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2636 states, 2635 states have (on average 2.2299810246679317) internal successors, (5876), 2635 states have internal predecessors, (5876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:38,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 5876 transitions. [2022-03-15 16:10:38,913 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 5876 transitions. Word has length 31 [2022-03-15 16:10:38,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:38,913 INFO L470 AbstractCegarLoop]: Abstraction has 2636 states and 5876 transitions. [2022-03-15 16:10:38,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:38,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 5876 transitions. [2022-03-15 16:10:38,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:10:38,916 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:38,916 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:38,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-15 16:10:39,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:39,116 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:10:39,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:39,117 INFO L85 PathProgramCache]: Analyzing trace with hash 153363937, now seen corresponding path program 47 times [2022-03-15 16:10:39,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:39,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356793222] [2022-03-15 16:10:39,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:39,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:39,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:39,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356793222] [2022-03-15 16:10:39,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356793222] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:39,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017673134] [2022-03-15 16:10:39,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:10:39,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:39,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:39,337 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:39,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 16:10:39,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:10:39,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:39,359 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:10:39,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:39,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:39,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:39,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:39,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:39,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:39,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:39,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:39,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:39,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:39,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:39,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:39,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:39,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:10:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:39,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:40,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:40,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:40,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:40,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:40,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:40,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:40,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:40,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:40,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:40,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:40,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:40,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:40,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:40,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:40,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:40,349 INFO L353 Elim1Store]: treesize reduction 26, result has 80.5 percent of original size [2022-03-15 16:10:40,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 74 treesize of output 140 [2022-03-15 16:10:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:40,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017673134] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:40,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:40,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 38 [2022-03-15 16:10:40,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273554741] [2022-03-15 16:10:40,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:40,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 16:10:40,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:40,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 16:10:40,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1200, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:10:40,655 INFO L87 Difference]: Start difference. First operand 2636 states and 5876 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:43,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:43,222 INFO L93 Difference]: Finished difference Result 4982 states and 10804 transitions. [2022-03-15 16:10:43,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-15 16:10:43,223 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:10:43,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:43,229 INFO L225 Difference]: With dead ends: 4982 [2022-03-15 16:10:43,229 INFO L226 Difference]: Without dead ends: 4719 [2022-03-15 16:10:43,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2168 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1107, Invalid=6549, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 16:10:43,230 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 579 mSDsluCounter, 1491 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:43,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 1230 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1041 Invalid, 0 Unknown, 87 Unchecked, 0.5s Time] [2022-03-15 16:10:43,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4719 states. [2022-03-15 16:10:43,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4719 to 2810. [2022-03-15 16:10:43,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2810 states, 2809 states have (on average 2.22997508009968) internal successors, (6264), 2809 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:43,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 6264 transitions. [2022-03-15 16:10:43,270 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 6264 transitions. Word has length 31 [2022-03-15 16:10:43,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:43,270 INFO L470 AbstractCegarLoop]: Abstraction has 2810 states and 6264 transitions. [2022-03-15 16:10:43,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:43,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 6264 transitions. [2022-03-15 16:10:43,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:10:43,273 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:43,273 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:43,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 16:10:43,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-15 16:10:43,487 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:10:43,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:43,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2114440965, now seen corresponding path program 48 times [2022-03-15 16:10:43,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:43,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205546509] [2022-03-15 16:10:43,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:43,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:43,728 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:43,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:43,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205546509] [2022-03-15 16:10:43,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205546509] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:43,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962168625] [2022-03-15 16:10:43,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:10:43,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:43,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:43,730 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:43,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 16:10:43,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:10:43,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:43,751 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:10:43,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:44,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:44,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:44,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:44,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:44,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:44,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:44,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:44,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:44,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:44,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:44,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:10:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:44,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:44,731 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:10:44,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:10:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:45,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962168625] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:45,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:45,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-15 16:10:45,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039108562] [2022-03-15 16:10:45,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:45,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:10:45,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:45,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:10:45,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:10:45,115 INFO L87 Difference]: Start difference. First operand 2810 states and 6264 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:47,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:47,368 INFO L93 Difference]: Finished difference Result 4720 states and 10370 transitions. [2022-03-15 16:10:47,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-15 16:10:47,369 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:10:47,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:47,374 INFO L225 Difference]: With dead ends: 4720 [2022-03-15 16:10:47,374 INFO L226 Difference]: Without dead ends: 4590 [2022-03-15 16:10:47,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2783 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1051, Invalid=8069, Unknown=0, NotChecked=0, Total=9120 [2022-03-15 16:10:47,375 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 438 mSDsluCounter, 1945 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 422 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:47,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 1806 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1274 Invalid, 0 Unknown, 422 Unchecked, 0.5s Time] [2022-03-15 16:10:47,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4590 states. [2022-03-15 16:10:47,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4590 to 2947. [2022-03-15 16:10:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2947 states, 2946 states have (on average 2.2342158859470467) internal successors, (6582), 2946 states have internal predecessors, (6582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2947 states to 2947 states and 6582 transitions. [2022-03-15 16:10:47,415 INFO L78 Accepts]: Start accepts. Automaton has 2947 states and 6582 transitions. Word has length 31 [2022-03-15 16:10:47,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:47,415 INFO L470 AbstractCegarLoop]: Abstraction has 2947 states and 6582 transitions. [2022-03-15 16:10:47,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:47,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2947 states and 6582 transitions. [2022-03-15 16:10:47,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:10:47,418 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:47,418 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:47,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-15 16:10:47,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-15 16:10:47,618 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:10:47,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:47,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1707666981, now seen corresponding path program 49 times [2022-03-15 16:10:47,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:47,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694781808] [2022-03-15 16:10:47,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:47,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:47,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:47,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694781808] [2022-03-15 16:10:47,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694781808] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:47,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101804788] [2022-03-15 16:10:47,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:10:47,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:47,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:47,849 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:47,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 16:10:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:47,870 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:10:47,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:48,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:48,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:48,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:48,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:48,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:48,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:48,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:48,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:48,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:48,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:48,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:10:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:48,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:48,874 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:10:48,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:10:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:49,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101804788] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:49,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:49,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-15 16:10:49,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710818567] [2022-03-15 16:10:49,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:49,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:10:49,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:49,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:10:49,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:10:49,191 INFO L87 Difference]: Start difference. First operand 2947 states and 6582 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:50,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:50,471 INFO L93 Difference]: Finished difference Result 4165 states and 9186 transitions. [2022-03-15 16:10:50,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:10:50,471 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:10:50,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:50,476 INFO L225 Difference]: With dead ends: 4165 [2022-03-15 16:10:50,477 INFO L226 Difference]: Without dead ends: 4128 [2022-03-15 16:10:50,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=597, Invalid=4373, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 16:10:50,477 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 344 mSDsluCounter, 1294 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:50,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 1256 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 839 Invalid, 0 Unknown, 288 Unchecked, 0.4s Time] [2022-03-15 16:10:50,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2022-03-15 16:10:50,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3028. [2022-03-15 16:10:50,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 3027 states have (on average 2.2362074661380906) internal successors, (6769), 3027 states have internal predecessors, (6769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 6769 transitions. [2022-03-15 16:10:50,520 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 6769 transitions. Word has length 31 [2022-03-15 16:10:50,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:50,520 INFO L470 AbstractCegarLoop]: Abstraction has 3028 states and 6769 transitions. [2022-03-15 16:10:50,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:50,520 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 6769 transitions. [2022-03-15 16:10:50,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:10:50,523 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:50,523 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:50,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-15 16:10:50,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:50,723 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:10:50,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:50,724 INFO L85 PathProgramCache]: Analyzing trace with hash 151060189, now seen corresponding path program 50 times [2022-03-15 16:10:50,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:50,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142799440] [2022-03-15 16:10:50,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:50,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:50,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:50,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142799440] [2022-03-15 16:10:50,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142799440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:50,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699877865] [2022-03-15 16:10:50,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:10:50,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:50,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:50,968 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:50,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 16:10:50,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:10:50,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:50,988 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:10:50,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:51,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:51,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:51,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:51,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:51,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:51,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:51,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:51,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:51,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:51,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:10:51,479 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:51,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:51,955 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:10:51,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:10:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:52,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699877865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:52,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:52,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-15 16:10:52,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88733125] [2022-03-15 16:10:52,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:52,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:10:52,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:52,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:10:52,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:10:52,326 INFO L87 Difference]: Start difference. First operand 3028 states and 6769 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:53,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:53,514 INFO L93 Difference]: Finished difference Result 4423 states and 9779 transitions. [2022-03-15 16:10:53,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 16:10:53,514 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:10:53,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:53,520 INFO L225 Difference]: With dead ends: 4423 [2022-03-15 16:10:53,520 INFO L226 Difference]: Without dead ends: 4385 [2022-03-15 16:10:53,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=654, Invalid=4602, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 16:10:53,521 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 333 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:53,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 1238 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 816 Invalid, 0 Unknown, 268 Unchecked, 0.4s Time] [2022-03-15 16:10:53,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4385 states. [2022-03-15 16:10:53,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4385 to 3136. [2022-03-15 16:10:53,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3136 states, 3135 states have (on average 2.23859649122807) internal successors, (7018), 3135 states have internal predecessors, (7018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:53,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3136 states to 3136 states and 7018 transitions. [2022-03-15 16:10:53,563 INFO L78 Accepts]: Start accepts. Automaton has 3136 states and 7018 transitions. Word has length 31 [2022-03-15 16:10:53,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:53,563 INFO L470 AbstractCegarLoop]: Abstraction has 3136 states and 7018 transitions. [2022-03-15 16:10:53,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:53,563 INFO L276 IsEmpty]: Start isEmpty. Operand 3136 states and 7018 transitions. [2022-03-15 16:10:53,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:10:53,566 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:53,566 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:53,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-15 16:10:53,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-15 16:10:53,770 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:10:53,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:53,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1344463177, now seen corresponding path program 51 times [2022-03-15 16:10:53,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:53,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003068451] [2022-03-15 16:10:53,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:53,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:54,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:54,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003068451] [2022-03-15 16:10:54,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003068451] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:54,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043118216] [2022-03-15 16:10:54,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:10:54,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:54,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:54,009 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:54,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 16:10:54,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:10:54,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:54,032 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:10:54,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:54,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:54,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:54,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:54,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:54,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:54,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:54,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:54,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:54,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:54,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:10:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:54,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:54,959 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:10:54,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:10:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:55,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043118216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:55,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:55,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 34 [2022-03-15 16:10:55,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204441202] [2022-03-15 16:10:55,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:55,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:10:55,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:55,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:10:55,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:10:55,245 INFO L87 Difference]: Start difference. First operand 3136 states and 7018 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:56,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:10:56,807 INFO L93 Difference]: Finished difference Result 4611 states and 10123 transitions. [2022-03-15 16:10:56,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 16:10:56,807 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:10:56,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:10:56,813 INFO L225 Difference]: With dead ends: 4611 [2022-03-15 16:10:56,813 INFO L226 Difference]: Without dead ends: 4387 [2022-03-15 16:10:56,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=630, Invalid=4482, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 16:10:56,814 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 429 mSDsluCounter, 1831 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 1518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:10:56,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 1542 Invalid, 1518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1279 Invalid, 0 Unknown, 147 Unchecked, 0.5s Time] [2022-03-15 16:10:56,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4387 states. [2022-03-15 16:10:56,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4387 to 3187. [2022-03-15 16:10:56,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3187 states, 3186 states have (on average 2.2360326428123036) internal successors, (7124), 3186 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:56,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3187 states to 3187 states and 7124 transitions. [2022-03-15 16:10:56,861 INFO L78 Accepts]: Start accepts. Automaton has 3187 states and 7124 transitions. Word has length 31 [2022-03-15 16:10:56,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:10:56,861 INFO L470 AbstractCegarLoop]: Abstraction has 3187 states and 7124 transitions. [2022-03-15 16:10:56,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:10:56,861 INFO L276 IsEmpty]: Start isEmpty. Operand 3187 states and 7124 transitions. [2022-03-15 16:10:56,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:10:56,864 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:10:56,864 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:10:56,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-15 16:10:57,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-15 16:10:57,077 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:10:57,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:10:57,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1802128239, now seen corresponding path program 52 times [2022-03-15 16:10:57,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:10:57,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094123764] [2022-03-15 16:10:57,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:10:57,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:10:57,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:10:57,276 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:57,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:10:57,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094123764] [2022-03-15 16:10:57,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094123764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:10:57,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025837587] [2022-03-15 16:10:57,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:10:57,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:10:57,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:10:57,278 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:10:57,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 16:10:57,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:10:57,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:10:57,298 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:10:57,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:10:57,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:57,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:57,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:57,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:57,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:57,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:57,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:57,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:10:57,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:10:57,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:10:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:57,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:10:58,224 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:10:58,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:10:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:10:58,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025837587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:10:58,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:10:58,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 34 [2022-03-15 16:10:58,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134698746] [2022-03-15 16:10:58,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:10:58,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:10:58,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:10:58,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:10:58,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:10:58,616 INFO L87 Difference]: Start difference. First operand 3187 states and 7124 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:00,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:00,245 INFO L93 Difference]: Finished difference Result 4816 states and 10621 transitions. [2022-03-15 16:11:00,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 16:11:00,246 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:11:00,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:00,251 INFO L225 Difference]: With dead ends: 4816 [2022-03-15 16:11:00,251 INFO L226 Difference]: Without dead ends: 4770 [2022-03-15 16:11:00,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1743 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=761, Invalid=5401, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 16:11:00,252 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 325 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:00,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 1374 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1060 Invalid, 0 Unknown, 146 Unchecked, 0.4s Time] [2022-03-15 16:11:00,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4770 states. [2022-03-15 16:11:00,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4770 to 3223. [2022-03-15 16:11:00,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 3222 states have (on average 2.238050900062073) internal successors, (7211), 3222 states have internal predecessors, (7211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:00,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 7211 transitions. [2022-03-15 16:11:00,292 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 7211 transitions. Word has length 31 [2022-03-15 16:11:00,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:00,292 INFO L470 AbstractCegarLoop]: Abstraction has 3223 states and 7211 transitions. [2022-03-15 16:11:00,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:00,292 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 7211 transitions. [2022-03-15 16:11:00,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:11:00,295 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:00,295 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:00,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-15 16:11:00,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:00,496 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:11:00,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:00,496 INFO L85 PathProgramCache]: Analyzing trace with hash 682699217, now seen corresponding path program 53 times [2022-03-15 16:11:00,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:00,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465033108] [2022-03-15 16:11:00,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:00,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:00,744 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:00,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465033108] [2022-03-15 16:11:00,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465033108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:00,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461494550] [2022-03-15 16:11:00,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:11:00,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:00,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:00,746 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:00,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 16:11:00,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:11:00,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:00,768 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-15 16:11:00,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:01,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:01,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:01,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:01,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:01,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:01,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:01,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:01,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:01,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:01,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:01,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:01,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:01,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2022-03-15 16:11:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:01,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:01,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:01,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:11:01,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 144 [2022-03-15 16:11:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:02,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461494550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:02,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:02,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-03-15 16:11:02,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531898153] [2022-03-15 16:11:02,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:02,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-15 16:11:02,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:02,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-15 16:11:02,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 16:11:02,032 INFO L87 Difference]: Start difference. First operand 3223 states and 7211 transitions. Second operand has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:06,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:06,139 INFO L93 Difference]: Finished difference Result 5307 states and 11599 transitions. [2022-03-15 16:11:06,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-15 16:11:06,139 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:11:06,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:06,145 INFO L225 Difference]: With dead ends: 5307 [2022-03-15 16:11:06,145 INFO L226 Difference]: Without dead ends: 5194 [2022-03-15 16:11:06,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3994 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1832, Invalid=12210, Unknown=0, NotChecked=0, Total=14042 [2022-03-15 16:11:06,146 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 443 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:06,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 1730 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1147 Invalid, 0 Unknown, 224 Unchecked, 0.6s Time] [2022-03-15 16:11:06,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2022-03-15 16:11:06,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 3373. [2022-03-15 16:11:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3373 states, 3372 states have (on average 2.2384341637010676) internal successors, (7548), 3372 states have internal predecessors, (7548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:06,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3373 states to 3373 states and 7548 transitions. [2022-03-15 16:11:06,188 INFO L78 Accepts]: Start accepts. Automaton has 3373 states and 7548 transitions. Word has length 31 [2022-03-15 16:11:06,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:06,188 INFO L470 AbstractCegarLoop]: Abstraction has 3373 states and 7548 transitions. [2022-03-15 16:11:06,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:06,188 INFO L276 IsEmpty]: Start isEmpty. Operand 3373 states and 7548 transitions. [2022-03-15 16:11:06,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:11:06,191 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:06,191 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:06,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-15 16:11:06,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:06,402 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:11:06,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:06,402 INFO L85 PathProgramCache]: Analyzing trace with hash 209839867, now seen corresponding path program 54 times [2022-03-15 16:11:06,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:06,402 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774981030] [2022-03-15 16:11:06,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:06,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:06,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:06,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774981030] [2022-03-15 16:11:06,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774981030] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:06,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837393060] [2022-03-15 16:11:06,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:11:06,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:06,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:06,615 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:06,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 16:11:06,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:11:06,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:06,636 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:11:06,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:07,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:07,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:07,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:07,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:07,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:07,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:07,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:07,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:11:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:07,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:07,590 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:11:07,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:11:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:07,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837393060] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:07,907 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:07,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2022-03-15 16:11:07,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535817732] [2022-03-15 16:11:07,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:07,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:11:07,907 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:07,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:11:07,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:11:07,908 INFO L87 Difference]: Start difference. First operand 3373 states and 7548 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:09,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:09,104 INFO L93 Difference]: Finished difference Result 4621 states and 10224 transitions. [2022-03-15 16:11:09,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:11:09,105 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:11:09,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:09,110 INFO L225 Difference]: With dead ends: 4621 [2022-03-15 16:11:09,110 INFO L226 Difference]: Without dead ends: 4584 [2022-03-15 16:11:09,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=581, Invalid=4111, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 16:11:09,111 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 335 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:09,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 1150 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 810 Invalid, 0 Unknown, 114 Unchecked, 0.3s Time] [2022-03-15 16:11:09,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4584 states. [2022-03-15 16:11:09,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4584 to 3406. [2022-03-15 16:11:09,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 3405 states have (on average 2.2387665198237885) internal successors, (7623), 3405 states have internal predecessors, (7623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:09,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 7623 transitions. [2022-03-15 16:11:09,154 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 7623 transitions. Word has length 31 [2022-03-15 16:11:09,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:09,154 INFO L470 AbstractCegarLoop]: Abstraction has 3406 states and 7623 transitions. [2022-03-15 16:11:09,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:09,155 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 7623 transitions. [2022-03-15 16:11:09,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:11:09,158 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:09,158 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:09,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-15 16:11:09,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-15 16:11:09,371 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:11:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:09,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1346766925, now seen corresponding path program 55 times [2022-03-15 16:11:09,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:09,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46461810] [2022-03-15 16:11:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:09,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:09,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:09,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46461810] [2022-03-15 16:11:09,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46461810] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:09,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666481315] [2022-03-15 16:11:09,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:11:09,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:09,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:09,621 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:09,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 16:11:09,643 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:11:09,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:10,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:10,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:10,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:10,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:10,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:10,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:10,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:10,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:11:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:10,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:10,608 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:11:10,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:11:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:10,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666481315] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:10,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:10,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2022-03-15 16:11:10,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402805352] [2022-03-15 16:11:10,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:10,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:11:10,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:10,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:11:10,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:11:10,998 INFO L87 Difference]: Start difference. First operand 3406 states and 7623 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:12,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:12,128 INFO L93 Difference]: Finished difference Result 4711 states and 10424 transitions. [2022-03-15 16:11:12,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:11:12,129 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 16:11:12,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:12,134 INFO L225 Difference]: With dead ends: 4711 [2022-03-15 16:11:12,134 INFO L226 Difference]: Without dead ends: 4673 [2022-03-15 16:11:12,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=631, Invalid=3925, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 16:11:12,135 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 332 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:12,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 1219 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 852 Invalid, 0 Unknown, 354 Unchecked, 0.3s Time] [2022-03-15 16:11:12,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4673 states. [2022-03-15 16:11:12,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4673 to 3427. [2022-03-15 16:11:12,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 2.2387624051371864) internal successors, (7670), 3426 states have internal predecessors, (7670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:12,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 7670 transitions. [2022-03-15 16:11:12,181 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 7670 transitions. Word has length 31 [2022-03-15 16:11:12,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:12,181 INFO L470 AbstractCegarLoop]: Abstraction has 3427 states and 7670 transitions. [2022-03-15 16:11:12,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:12,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 7670 transitions. [2022-03-15 16:11:12,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 16:11:12,184 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:12,184 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:12,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-15 16:11:12,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:12,385 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:11:12,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:12,385 INFO L85 PathProgramCache]: Analyzing trace with hash -498068899, now seen corresponding path program 56 times [2022-03-15 16:11:12,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:12,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001270198] [2022-03-15 16:11:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:12,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:12,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:12,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:12,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001270198] [2022-03-15 16:11:12,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001270198] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:12,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895222350] [2022-03-15 16:11:12,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:11:12,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:12,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:12,616 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:12,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 16:11:12,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:11:12,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:12,636 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:11:12,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:12,993 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-15 16:11:12,993 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 68 treesize of output 28 [2022-03-15 16:11:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:13,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:13,483 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:11:13,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:11:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:13,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895222350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:13,791 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:13,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2022-03-15 16:11:13,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704134800] [2022-03-15 16:11:13,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:13,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:11:13,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:13,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:11:13,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:11:13,792 INFO L87 Difference]: Start difference. First operand 3427 states and 7670 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 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) [2022-03-15 16:11:14,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:14,496 INFO L93 Difference]: Finished difference Result 4564 states and 10125 transitions. [2022-03-15 16:11:14,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 16:11:14,497 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 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 31 [2022-03-15 16:11:14,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:14,501 INFO L225 Difference]: With dead ends: 4564 [2022-03-15 16:11:14,501 INFO L226 Difference]: Without dead ends: 4549 [2022-03-15 16:11:14,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=308, Invalid=1948, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:11:14,501 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 238 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:14,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 955 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:11:14,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4549 states. [2022-03-15 16:11:14,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4549 to 3359. [2022-03-15 16:11:14,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3359 states, 3358 states have (on average 2.2364502680166765) internal successors, (7510), 3358 states have internal predecessors, (7510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3359 states to 3359 states and 7510 transitions. [2022-03-15 16:11:14,536 INFO L78 Accepts]: Start accepts. Automaton has 3359 states and 7510 transitions. Word has length 31 [2022-03-15 16:11:14,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:14,536 INFO L470 AbstractCegarLoop]: Abstraction has 3359 states and 7510 transitions. [2022-03-15 16:11:14,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 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) [2022-03-15 16:11:14,536 INFO L276 IsEmpty]: Start isEmpty. Operand 3359 states and 7510 transitions. [2022-03-15 16:11:14,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 16:11:14,540 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:14,540 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:14,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-15 16:11:14,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-03-15 16:11:14,740 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:11:14,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:14,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1419037698, now seen corresponding path program 57 times [2022-03-15 16:11:14,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:14,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651804742] [2022-03-15 16:11:14,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:14,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:14,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:14,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651804742] [2022-03-15 16:11:14,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651804742] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:14,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465847815] [2022-03-15 16:11:14,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:11:14,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:14,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:14,773 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:14,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-15 16:11:14,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 16:11:14,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:14,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 16:11:14,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:14,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:14,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465847815] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:14,912 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:14,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-15 16:11:14,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495413747] [2022-03-15 16:11:14,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:14,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 16:11:14,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:14,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 16:11:14,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:11:14,913 INFO L87 Difference]: Start difference. First operand 3359 states and 7510 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:14,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:14,956 INFO L93 Difference]: Finished difference Result 4683 states and 10523 transitions. [2022-03-15 16:11:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 16:11:14,956 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 33 [2022-03-15 16:11:14,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:14,962 INFO L225 Difference]: With dead ends: 4683 [2022-03-15 16:11:14,963 INFO L226 Difference]: Without dead ends: 4674 [2022-03-15 16:11:14,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-03-15 16:11:14,963 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 82 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:14,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 68 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:11:14,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4674 states. [2022-03-15 16:11:15,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4674 to 4216. [2022-03-15 16:11:15,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4216 states, 4215 states have (on average 2.265717674970344) internal successors, (9550), 4215 states have internal predecessors, (9550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:15,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4216 states to 4216 states and 9550 transitions. [2022-03-15 16:11:15,022 INFO L78 Accepts]: Start accepts. Automaton has 4216 states and 9550 transitions. Word has length 33 [2022-03-15 16:11:15,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:15,022 INFO L470 AbstractCegarLoop]: Abstraction has 4216 states and 9550 transitions. [2022-03-15 16:11:15,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:15,022 INFO L276 IsEmpty]: Start isEmpty. Operand 4216 states and 9550 transitions. [2022-03-15 16:11:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:11:15,027 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:15,027 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:15,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-15 16:11:15,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-03-15 16:11:15,243 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:11:15,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:15,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1276485027, now seen corresponding path program 58 times [2022-03-15 16:11:15,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:15,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888859274] [2022-03-15 16:11:15,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:15,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:15,438 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:15,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:15,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888859274] [2022-03-15 16:11:15,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888859274] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:15,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158909184] [2022-03-15 16:11:15,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:11:15,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:15,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:15,440 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:15,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-15 16:11:15,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:11:15,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:15,468 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:11:15,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:15,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:15,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:15,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:15,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:15,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:15,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:15,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:15,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:15,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:15,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:15,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:15,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:15,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:11:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:15,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:16,496 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:11:16,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:11:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:16,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158909184] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:16,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:16,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 16:11:16,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983785741] [2022-03-15 16:11:16,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:16,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:11:16,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:16,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:11:16,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:11:16,858 INFO L87 Difference]: Start difference. First operand 4216 states and 9550 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:17,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:17,806 INFO L93 Difference]: Finished difference Result 7434 states and 16637 transitions. [2022-03-15 16:11:17,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 16:11:17,806 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:11:17,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:17,815 INFO L225 Difference]: With dead ends: 7434 [2022-03-15 16:11:17,815 INFO L226 Difference]: Without dead ends: 7404 [2022-03-15 16:11:17,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=533, Invalid=3889, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 16:11:17,816 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 323 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:17,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 1038 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 640 Invalid, 0 Unknown, 235 Unchecked, 0.3s Time] [2022-03-15 16:11:17,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7404 states. [2022-03-15 16:11:17,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7404 to 4177. [2022-03-15 16:11:17,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4177 states, 4176 states have (on average 2.2662835249042144) internal successors, (9464), 4176 states have internal predecessors, (9464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:17,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4177 states to 4177 states and 9464 transitions. [2022-03-15 16:11:17,875 INFO L78 Accepts]: Start accepts. Automaton has 4177 states and 9464 transitions. Word has length 34 [2022-03-15 16:11:17,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:17,875 INFO L470 AbstractCegarLoop]: Abstraction has 4177 states and 9464 transitions. [2022-03-15 16:11:17,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:17,876 INFO L276 IsEmpty]: Start isEmpty. Operand 4177 states and 9464 transitions. [2022-03-15 16:11:17,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:11:17,879 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:17,879 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:17,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-15 16:11:18,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:18,080 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:11:18,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:18,080 INFO L85 PathProgramCache]: Analyzing trace with hash -429207779, now seen corresponding path program 59 times [2022-03-15 16:11:18,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:18,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133088233] [2022-03-15 16:11:18,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:18,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:18,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:18,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133088233] [2022-03-15 16:11:18,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133088233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:18,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553143078] [2022-03-15 16:11:18,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:11:18,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:18,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:18,318 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:18,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-15 16:11:18,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:11:18,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:18,356 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-15 16:11:18,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:18,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:18,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:18,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:18,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:18,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:18,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:18,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:18,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:18,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:18,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:18,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:18,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:18,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:11:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:18,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:19,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:19,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:19,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:19,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:19,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:19,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:19,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:19,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:19,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:19,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:19,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:19,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:19,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:19,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:19,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:19,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:19,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:19,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:19,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:11:19,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 144 [2022-03-15 16:11:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:19,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553143078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:19,545 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:19,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-15 16:11:19,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422694509] [2022-03-15 16:11:19,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:19,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 16:11:19,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:19,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 16:11:19,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 16:11:19,546 INFO L87 Difference]: Start difference. First operand 4177 states and 9464 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:21,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:21,135 INFO L93 Difference]: Finished difference Result 6334 states and 14089 transitions. [2022-03-15 16:11:21,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 16:11:21,136 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:11:21,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:21,144 INFO L225 Difference]: With dead ends: 6334 [2022-03-15 16:11:21,144 INFO L226 Difference]: Without dead ends: 6274 [2022-03-15 16:11:21,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2062 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=833, Invalid=6139, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 16:11:21,145 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 344 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:21,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 1301 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 744 Invalid, 0 Unknown, 250 Unchecked, 0.3s Time] [2022-03-15 16:11:21,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6274 states. [2022-03-15 16:11:21,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6274 to 4147. [2022-03-15 16:11:21,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4147 states, 4146 states have (on average 2.265074770863483) internal successors, (9391), 4146 states have internal predecessors, (9391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4147 states to 4147 states and 9391 transitions. [2022-03-15 16:11:21,202 INFO L78 Accepts]: Start accepts. Automaton has 4147 states and 9391 transitions. Word has length 34 [2022-03-15 16:11:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:21,202 INFO L470 AbstractCegarLoop]: Abstraction has 4147 states and 9391 transitions. [2022-03-15 16:11:21,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 4147 states and 9391 transitions. [2022-03-15 16:11:21,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:11:21,205 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:21,205 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:21,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-15 16:11:21,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:21,406 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:11:21,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:21,406 INFO L85 PathProgramCache]: Analyzing trace with hash -741388485, now seen corresponding path program 60 times [2022-03-15 16:11:21,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:21,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044863871] [2022-03-15 16:11:21,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:21,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:21,649 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:21,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044863871] [2022-03-15 16:11:21,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044863871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:21,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712335223] [2022-03-15 16:11:21,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:11:21,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:21,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:21,650 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:21,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-15 16:11:21,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:11:21,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:21,672 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:11:21,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:22,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:22,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:22,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:22,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:22,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:22,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:22,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:22,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:22,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:22,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:22,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:22,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:22,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:22,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:22,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:22,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:11:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:22,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:22,740 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:11:22,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:11:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:23,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712335223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:23,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:23,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 16:11:23,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47841529] [2022-03-15 16:11:23,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:23,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:11:23,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:23,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:11:23,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:11:23,061 INFO L87 Difference]: Start difference. First operand 4147 states and 9391 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:24,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:24,287 INFO L93 Difference]: Finished difference Result 6131 states and 13674 transitions. [2022-03-15 16:11:24,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:11:24,287 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:11:24,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:24,295 INFO L225 Difference]: With dead ends: 6131 [2022-03-15 16:11:24,295 INFO L226 Difference]: Without dead ends: 6101 [2022-03-15 16:11:24,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=655, Invalid=4601, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 16:11:24,295 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 325 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:24,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 1099 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 734 Invalid, 0 Unknown, 483 Unchecked, 0.3s Time] [2022-03-15 16:11:24,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6101 states. [2022-03-15 16:11:24,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6101 to 4123. [2022-03-15 16:11:24,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4123 states, 4122 states have (on average 2.2646773410965553) internal successors, (9335), 4122 states have internal predecessors, (9335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:24,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4123 states to 4123 states and 9335 transitions. [2022-03-15 16:11:24,350 INFO L78 Accepts]: Start accepts. Automaton has 4123 states and 9335 transitions. Word has length 34 [2022-03-15 16:11:24,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:24,350 INFO L470 AbstractCegarLoop]: Abstraction has 4123 states and 9335 transitions. [2022-03-15 16:11:24,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:24,350 INFO L276 IsEmpty]: Start isEmpty. Operand 4123 states and 9335 transitions. [2022-03-15 16:11:24,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:11:24,353 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:24,353 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:24,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-15 16:11:24,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-15 16:11:24,554 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:11:24,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:24,554 INFO L85 PathProgramCache]: Analyzing trace with hash 2020734821, now seen corresponding path program 61 times [2022-03-15 16:11:24,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:24,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213699391] [2022-03-15 16:11:24,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:24,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:24,759 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:24,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213699391] [2022-03-15 16:11:24,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213699391] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:24,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682660972] [2022-03-15 16:11:24,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:11:24,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:24,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:24,760 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:24,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-15 16:11:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:24,781 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:11:24,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:25,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:25,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:25,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:25,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:25,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:25,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:25,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:25,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:25,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:25,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:25,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:25,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:25,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:25,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:11:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:25,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:25,821 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:11:25,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:11:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:26,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682660972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:26,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:26,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 16:11:26,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813940811] [2022-03-15 16:11:26,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:26,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:11:26,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:26,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:11:26,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:11:26,253 INFO L87 Difference]: Start difference. First operand 4123 states and 9335 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:27,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:27,297 INFO L93 Difference]: Finished difference Result 5878 states and 13093 transitions. [2022-03-15 16:11:27,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:11:27,297 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:11:27,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:27,304 INFO L225 Difference]: With dead ends: 5878 [2022-03-15 16:11:27,304 INFO L226 Difference]: Without dead ends: 5848 [2022-03-15 16:11:27,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=599, Invalid=4093, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 16:11:27,305 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 294 mSDsluCounter, 1318 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:27,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 1320 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 834 Invalid, 0 Unknown, 410 Unchecked, 0.3s Time] [2022-03-15 16:11:27,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5848 states. [2022-03-15 16:11:27,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5848 to 4117. [2022-03-15 16:11:27,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4117 states, 4116 states have (on average 2.2648202137998057) internal successors, (9322), 4116 states have internal predecessors, (9322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:27,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4117 states to 4117 states and 9322 transitions. [2022-03-15 16:11:27,357 INFO L78 Accepts]: Start accepts. Automaton has 4117 states and 9322 transitions. Word has length 34 [2022-03-15 16:11:27,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:27,357 INFO L470 AbstractCegarLoop]: Abstraction has 4117 states and 9322 transitions. [2022-03-15 16:11:27,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:27,357 INFO L276 IsEmpty]: Start isEmpty. Operand 4117 states and 9322 transitions. [2022-03-15 16:11:27,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:11:27,360 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:27,360 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:27,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-15 16:11:27,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-15 16:11:27,561 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:11:27,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:27,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1285498223, now seen corresponding path program 62 times [2022-03-15 16:11:27,561 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:27,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573355524] [2022-03-15 16:11:27,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:27,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:27,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:27,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573355524] [2022-03-15 16:11:27,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573355524] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:27,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763031972] [2022-03-15 16:11:27,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:11:27,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:27,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:27,771 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:27,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-15 16:11:27,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:11:27,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:27,795 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:11:27,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:28,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:28,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:28,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:28,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:28,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:28,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:28,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:28,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:28,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:28,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:28,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:11:28,305 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:28,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:28,797 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:11:28,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:11:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:29,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763031972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:29,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:29,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-15 16:11:29,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854165618] [2022-03-15 16:11:29,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:29,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:11:29,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:29,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:11:29,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:11:29,191 INFO L87 Difference]: Start difference. First operand 4117 states and 9322 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:31,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:31,662 INFO L93 Difference]: Finished difference Result 8293 states and 18369 transitions. [2022-03-15 16:11:31,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-15 16:11:31,662 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:11:31,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:31,672 INFO L225 Difference]: With dead ends: 8293 [2022-03-15 16:11:31,672 INFO L226 Difference]: Without dead ends: 8218 [2022-03-15 16:11:31,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3049 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1151, Invalid=8551, Unknown=0, NotChecked=0, Total=9702 [2022-03-15 16:11:31,673 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 330 mSDsluCounter, 1660 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1532 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:31,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 1532 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1134 Invalid, 0 Unknown, 170 Unchecked, 0.5s Time] [2022-03-15 16:11:31,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8218 states. [2022-03-15 16:11:31,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8218 to 4517. [2022-03-15 16:11:31,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4517 states, 4516 states have (on average 2.2681576616474755) internal successors, (10243), 4516 states have internal predecessors, (10243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:31,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 10243 transitions. [2022-03-15 16:11:31,755 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 10243 transitions. Word has length 34 [2022-03-15 16:11:31,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:31,755 INFO L470 AbstractCegarLoop]: Abstraction has 4517 states and 10243 transitions. [2022-03-15 16:11:31,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:31,755 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 10243 transitions. [2022-03-15 16:11:31,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:11:31,759 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:31,759 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:31,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-15 16:11:31,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:31,959 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:11:31,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:31,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1762775215, now seen corresponding path program 63 times [2022-03-15 16:11:31,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:31,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280755999] [2022-03-15 16:11:31,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:31,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:32,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:32,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280755999] [2022-03-15 16:11:32,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280755999] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:32,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497850112] [2022-03-15 16:11:32,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:11:32,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:32,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:32,156 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:32,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-15 16:11:32,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 16:11:32,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:32,190 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:11:32,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:32,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:32,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:32,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:32,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:32,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:32,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:32,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:32,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:32,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:32,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:32,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:11:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:32,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:33,212 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:11:33,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:11:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:33,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497850112] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:33,754 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:33,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-15 16:11:33,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540835687] [2022-03-15 16:11:33,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:33,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:11:33,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:33,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:11:33,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:11:33,754 INFO L87 Difference]: Start difference. First operand 4517 states and 10243 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:34,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:34,808 INFO L93 Difference]: Finished difference Result 6136 states and 13678 transitions. [2022-03-15 16:11:34,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 16:11:34,808 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:11:34,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:34,828 INFO L225 Difference]: With dead ends: 6136 [2022-03-15 16:11:34,828 INFO L226 Difference]: Without dead ends: 6106 [2022-03-15 16:11:34,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=523, Invalid=4169, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 16:11:34,829 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 238 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:34,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 1289 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 658 Invalid, 0 Unknown, 231 Unchecked, 0.3s Time] [2022-03-15 16:11:34,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6106 states. [2022-03-15 16:11:34,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6106 to 4517. [2022-03-15 16:11:34,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4517 states, 4516 states have (on average 2.2681576616474755) internal successors, (10243), 4516 states have internal predecessors, (10243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 10243 transitions. [2022-03-15 16:11:34,883 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 10243 transitions. Word has length 34 [2022-03-15 16:11:34,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:34,883 INFO L470 AbstractCegarLoop]: Abstraction has 4517 states and 10243 transitions. [2022-03-15 16:11:34,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:34,883 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 10243 transitions. [2022-03-15 16:11:34,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:11:34,887 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:34,887 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:34,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-15 16:11:35,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-15 16:11:35,087 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:11:35,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:35,088 INFO L85 PathProgramCache]: Analyzing trace with hash -473498501, now seen corresponding path program 64 times [2022-03-15 16:11:35,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:35,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368244155] [2022-03-15 16:11:35,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:35,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:35,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:35,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368244155] [2022-03-15 16:11:35,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368244155] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:35,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119263093] [2022-03-15 16:11:35,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:11:35,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:35,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:35,278 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:35,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-15 16:11:35,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:11:35,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:35,300 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:11:35,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:35,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:35,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:35,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:35,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:35,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:35,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:35,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:35,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:35,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:35,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:35,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:35,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:11:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:35,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:36,298 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:11:36,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:11:36,594 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:36,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119263093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:36,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:36,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 35 [2022-03-15 16:11:36,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484360754] [2022-03-15 16:11:36,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:36,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:11:36,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:36,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:11:36,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:11:36,596 INFO L87 Difference]: Start difference. First operand 4517 states and 10243 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:39,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:39,260 INFO L93 Difference]: Finished difference Result 8467 states and 18699 transitions. [2022-03-15 16:11:39,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-15 16:11:39,260 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:11:39,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:39,271 INFO L225 Difference]: With dead ends: 8467 [2022-03-15 16:11:39,271 INFO L226 Difference]: Without dead ends: 8407 [2022-03-15 16:11:39,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3515 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1310, Invalid=9610, Unknown=0, NotChecked=0, Total=10920 [2022-03-15 16:11:39,272 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 359 mSDsluCounter, 1633 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:39,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 1543 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1117 Invalid, 0 Unknown, 122 Unchecked, 0.5s Time] [2022-03-15 16:11:39,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8407 states. [2022-03-15 16:11:39,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8407 to 4673. [2022-03-15 16:11:39,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4673 states, 4672 states have (on average 2.268193493150685) internal successors, (10597), 4672 states have internal predecessors, (10597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:39,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4673 states to 4673 states and 10597 transitions. [2022-03-15 16:11:39,344 INFO L78 Accepts]: Start accepts. Automaton has 4673 states and 10597 transitions. Word has length 34 [2022-03-15 16:11:39,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:39,344 INFO L470 AbstractCegarLoop]: Abstraction has 4673 states and 10597 transitions. [2022-03-15 16:11:39,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand 4673 states and 10597 transitions. [2022-03-15 16:11:39,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:11:39,348 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:39,348 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:39,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-15 16:11:39,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-15 16:11:39,559 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:11:39,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:39,560 INFO L85 PathProgramCache]: Analyzing trace with hash -792620933, now seen corresponding path program 65 times [2022-03-15 16:11:39,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:39,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646485819] [2022-03-15 16:11:39,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:39,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:11:39,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:39,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646485819] [2022-03-15 16:11:39,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646485819] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:39,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422719769] [2022-03-15 16:11:39,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:11:39,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:39,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:39,756 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:39,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-15 16:11:39,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:11:39,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:39,780 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:11:39,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:40,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:40,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:40,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:40,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:40,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:40,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:40,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:40,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:40,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:40,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:40,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:11:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:40,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:40,770 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:11:40,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:11:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:41,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422719769] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:41,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:41,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 35 [2022-03-15 16:11:41,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406714030] [2022-03-15 16:11:41,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:41,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:11:41,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:41,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:11:41,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:11:41,091 INFO L87 Difference]: Start difference. First operand 4673 states and 10597 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:43,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:43,409 INFO L93 Difference]: Finished difference Result 7658 states and 16969 transitions. [2022-03-15 16:11:43,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-15 16:11:43,409 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:11:43,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:43,419 INFO L225 Difference]: With dead ends: 7658 [2022-03-15 16:11:43,419 INFO L226 Difference]: Without dead ends: 7538 [2022-03-15 16:11:43,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2729 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1109, Invalid=7633, Unknown=0, NotChecked=0, Total=8742 [2022-03-15 16:11:43,420 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 456 mSDsluCounter, 1571 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:43,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 1449 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 988 Invalid, 0 Unknown, 270 Unchecked, 0.5s Time] [2022-03-15 16:11:43,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7538 states. [2022-03-15 16:11:43,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7538 to 4778. [2022-03-15 16:11:43,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4778 states, 4777 states have (on average 2.267531923801549) internal successors, (10832), 4777 states have internal predecessors, (10832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:43,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4778 states to 4778 states and 10832 transitions. [2022-03-15 16:11:43,486 INFO L78 Accepts]: Start accepts. Automaton has 4778 states and 10832 transitions. Word has length 34 [2022-03-15 16:11:43,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:43,487 INFO L470 AbstractCegarLoop]: Abstraction has 4778 states and 10832 transitions. [2022-03-15 16:11:43,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:43,487 INFO L276 IsEmpty]: Start isEmpty. Operand 4778 states and 10832 transitions. [2022-03-15 16:11:43,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:11:43,490 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:43,490 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:43,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-15 16:11:43,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:43,695 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:11:43,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:43,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1037560537, now seen corresponding path program 66 times [2022-03-15 16:11:43,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:43,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050630254] [2022-03-15 16:11:43,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:43,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:43,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:43,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:43,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050630254] [2022-03-15 16:11:43,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050630254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:43,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380148714] [2022-03-15 16:11:43,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:11:43,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:43,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:43,907 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:43,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-15 16:11:43,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:11:43,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:43,930 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:11:43,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:44,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:44,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:44,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:44,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:44,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:44,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:44,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:44,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:44,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:44,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:44,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:11:44,464 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:44,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:44,954 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:11:44,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:11:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:45,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380148714] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:45,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:45,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-15 16:11:45,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502379310] [2022-03-15 16:11:45,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:45,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:11:45,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:45,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:11:45,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:11:45,345 INFO L87 Difference]: Start difference. First operand 4778 states and 10832 transitions. Second operand has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:47,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:47,464 INFO L93 Difference]: Finished difference Result 7796 states and 17265 transitions. [2022-03-15 16:11:47,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-15 16:11:47,464 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:11:47,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:47,474 INFO L225 Difference]: With dead ends: 7796 [2022-03-15 16:11:47,474 INFO L226 Difference]: Without dead ends: 7735 [2022-03-15 16:11:47,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2521 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1024, Invalid=7532, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 16:11:47,475 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 369 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:47,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 1271 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 812 Invalid, 0 Unknown, 232 Unchecked, 0.4s Time] [2022-03-15 16:11:47,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7735 states. [2022-03-15 16:11:47,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7735 to 4718. [2022-03-15 16:11:47,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4718 states, 4717 states have (on average 2.2654229383082467) internal successors, (10686), 4717 states have internal predecessors, (10686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:47,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4718 states to 4718 states and 10686 transitions. [2022-03-15 16:11:47,543 INFO L78 Accepts]: Start accepts. Automaton has 4718 states and 10686 transitions. Word has length 34 [2022-03-15 16:11:47,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:47,543 INFO L470 AbstractCegarLoop]: Abstraction has 4718 states and 10686 transitions. [2022-03-15 16:11:47,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:47,543 INFO L276 IsEmpty]: Start isEmpty. Operand 4718 states and 10686 transitions. [2022-03-15 16:11:47,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:11:47,547 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:47,547 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:47,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-15 16:11:47,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-03-15 16:11:47,748 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:11:47,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:47,748 INFO L85 PathProgramCache]: Analyzing trace with hash -410940463, now seen corresponding path program 67 times [2022-03-15 16:11:47,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:47,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260402086] [2022-03-15 16:11:47,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:47,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:47,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:47,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260402086] [2022-03-15 16:11:47,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260402086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:47,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861724476] [2022-03-15 16:11:47,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:11:47,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:47,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:47,968 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:47,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-15 16:11:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:47,990 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:11:47,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:48,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:48,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:48,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:48,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:48,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:48,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:48,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:48,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:48,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:48,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:11:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:48,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:48,988 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:11:48,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:11:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:49,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861724476] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:49,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:49,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-15 16:11:49,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320983863] [2022-03-15 16:11:49,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:49,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:11:49,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:49,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:11:49,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1149, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:11:49,277 INFO L87 Difference]: Start difference. First operand 4718 states and 10686 transitions. Second operand has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:50,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:50,413 INFO L93 Difference]: Finished difference Result 6992 states and 15597 transitions. [2022-03-15 16:11:50,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:11:50,413 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:11:50,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:50,422 INFO L225 Difference]: With dead ends: 6992 [2022-03-15 16:11:50,422 INFO L226 Difference]: Without dead ends: 6962 [2022-03-15 16:11:50,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=547, Invalid=4009, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 16:11:50,423 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 345 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:50,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 1034 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 615 Invalid, 0 Unknown, 263 Unchecked, 0.3s Time] [2022-03-15 16:11:50,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6962 states. [2022-03-15 16:11:50,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6962 to 4727. [2022-03-15 16:11:50,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4727 states, 4726 states have (on average 2.26491747778248) internal successors, (10704), 4726 states have internal predecessors, (10704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:50,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4727 states to 4727 states and 10704 transitions. [2022-03-15 16:11:50,498 INFO L78 Accepts]: Start accepts. Automaton has 4727 states and 10704 transitions. Word has length 34 [2022-03-15 16:11:50,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:50,498 INFO L470 AbstractCegarLoop]: Abstraction has 4727 states and 10704 transitions. [2022-03-15 16:11:50,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:50,498 INFO L276 IsEmpty]: Start isEmpty. Operand 4727 states and 10704 transitions. [2022-03-15 16:11:50,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:11:50,502 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:50,502 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:50,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-15 16:11:50,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:50,703 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:11:50,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:50,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1610212667, now seen corresponding path program 68 times [2022-03-15 16:11:50,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:50,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126583447] [2022-03-15 16:11:50,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:50,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:50,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:50,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126583447] [2022-03-15 16:11:50,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126583447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:50,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200107804] [2022-03-15 16:11:50,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:11:50,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:50,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:50,915 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:50,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-15 16:11:50,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:11:50,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:50,936 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:11:50,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:51,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:51,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:51,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:51,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:51,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:51,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:51,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:51,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:51,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:51,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:51,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:51,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:11:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:51,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:51,941 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:11:51,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:11:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:52,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200107804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:52,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:52,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-15 16:11:52,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376536989] [2022-03-15 16:11:52,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:52,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:11:52,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:52,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:11:52,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1149, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:11:52,220 INFO L87 Difference]: Start difference. First operand 4727 states and 10704 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:53,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:53,707 INFO L93 Difference]: Finished difference Result 6526 states and 14543 transitions. [2022-03-15 16:11:53,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-15 16:11:53,707 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:11:53,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:53,716 INFO L225 Difference]: With dead ends: 6526 [2022-03-15 16:11:53,716 INFO L226 Difference]: Without dead ends: 6481 [2022-03-15 16:11:53,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1832 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=726, Invalid=5916, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 16:11:53,719 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 225 mSDsluCounter, 1715 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:53,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 1653 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 865 Invalid, 0 Unknown, 442 Unchecked, 0.4s Time] [2022-03-15 16:11:53,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6481 states. [2022-03-15 16:11:53,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6481 to 4856. [2022-03-15 16:11:53,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4856 states, 4855 states have (on average 2.266735324407827) internal successors, (11005), 4855 states have internal predecessors, (11005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:53,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 11005 transitions. [2022-03-15 16:11:53,780 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 11005 transitions. Word has length 34 [2022-03-15 16:11:53,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:53,780 INFO L470 AbstractCegarLoop]: Abstraction has 4856 states and 11005 transitions. [2022-03-15 16:11:53,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:53,780 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 11005 transitions. [2022-03-15 16:11:53,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:11:53,784 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:53,784 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:53,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-15 16:11:53,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:53,984 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:11:53,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:53,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1207019205, now seen corresponding path program 69 times [2022-03-15 16:11:53,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:53,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222157676] [2022-03-15 16:11:53,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:53,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:54,224 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:54,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222157676] [2022-03-15 16:11:54,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222157676] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:54,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36028644] [2022-03-15 16:11:54,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:11:54,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:54,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:54,226 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:54,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-15 16:11:54,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:11:54,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:54,248 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:11:54,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:54,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:54,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:54,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:54,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:54,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:54,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:54,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:54,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:54,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:54,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:54,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:11:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:54,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:55,258 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:11:55,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:11:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:11:55,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36028644] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:55,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:55,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-15 16:11:55,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601151314] [2022-03-15 16:11:55,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:55,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:11:55,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:55,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:11:55,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:11:55,520 INFO L87 Difference]: Start difference. First operand 4856 states and 11005 transitions. Second operand has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:57,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:11:57,972 INFO L93 Difference]: Finished difference Result 6948 states and 15393 transitions. [2022-03-15 16:11:57,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-15 16:11:57,972 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:11:57,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:11:57,980 INFO L225 Difference]: With dead ends: 6948 [2022-03-15 16:11:57,981 INFO L226 Difference]: Without dead ends: 6896 [2022-03-15 16:11:57,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3139 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1172, Invalid=9130, Unknown=0, NotChecked=0, Total=10302 [2022-03-15 16:11:57,983 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 419 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 1688 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:11:57,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 1688 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1171 Invalid, 0 Unknown, 241 Unchecked, 0.5s Time] [2022-03-15 16:11:57,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6896 states. [2022-03-15 16:11:58,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6896 to 4853. [2022-03-15 16:11:58,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4853 states, 4852 states have (on average 2.2669002473206925) internal successors, (10999), 4852 states have internal predecessors, (10999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:58,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4853 states to 4853 states and 10999 transitions. [2022-03-15 16:11:58,038 INFO L78 Accepts]: Start accepts. Automaton has 4853 states and 10999 transitions. Word has length 34 [2022-03-15 16:11:58,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:11:58,039 INFO L470 AbstractCegarLoop]: Abstraction has 4853 states and 10999 transitions. [2022-03-15 16:11:58,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:11:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 4853 states and 10999 transitions. [2022-03-15 16:11:58,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:11:58,042 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:11:58,042 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:11:58,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-15 16:11:58,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:58,255 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:11:58,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:11:58,255 INFO L85 PathProgramCache]: Analyzing trace with hash -355003469, now seen corresponding path program 70 times [2022-03-15 16:11:58,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:11:58,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443200204] [2022-03-15 16:11:58,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:11:58,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:11:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:11:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:58,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:11:58,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443200204] [2022-03-15 16:11:58,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443200204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:11:58,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982027343] [2022-03-15 16:11:58,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:11:58,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:11:58,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:11:58,472 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:11:58,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-15 16:11:58,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:11:58,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:11:58,492 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:11:58,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:11:58,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:58,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:58,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:58,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:58,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:58,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:58,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:58,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:58,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:11:58,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:11:58,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:11:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:59,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:11:59,500 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:11:59,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:11:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:11:59,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982027343] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:11:59,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:11:59,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-15 16:11:59,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568180328] [2022-03-15 16:11:59,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:11:59,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:11:59,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:11:59,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:11:59,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:11:59,804 INFO L87 Difference]: Start difference. First operand 4853 states and 10999 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:01,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:01,790 INFO L93 Difference]: Finished difference Result 6980 states and 15541 transitions. [2022-03-15 16:12:01,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-15 16:12:01,790 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:12:01,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:01,799 INFO L225 Difference]: With dead ends: 6980 [2022-03-15 16:12:01,799 INFO L226 Difference]: Without dead ends: 6890 [2022-03-15 16:12:01,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=894, Invalid=6762, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 16:12:01,799 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 455 mSDsluCounter, 1479 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:01,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 1417 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 848 Invalid, 0 Unknown, 322 Unchecked, 0.4s Time] [2022-03-15 16:12:01,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6890 states. [2022-03-15 16:12:01,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6890 to 4895. [2022-03-15 16:12:01,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4895 states, 4894 states have (on average 2.2674703718839395) internal successors, (11097), 4894 states have internal predecessors, (11097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:01,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4895 states to 4895 states and 11097 transitions. [2022-03-15 16:12:01,863 INFO L78 Accepts]: Start accepts. Automaton has 4895 states and 11097 transitions. Word has length 34 [2022-03-15 16:12:01,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:01,863 INFO L470 AbstractCegarLoop]: Abstraction has 4895 states and 11097 transitions. [2022-03-15 16:12:01,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:01,863 INFO L276 IsEmpty]: Start isEmpty. Operand 4895 states and 11097 transitions. [2022-03-15 16:12:01,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:12:01,867 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:01,867 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:01,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-15 16:12:02,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-03-15 16:12:02,068 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:12:02,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:02,068 INFO L85 PathProgramCache]: Analyzing trace with hash -667184175, now seen corresponding path program 71 times [2022-03-15 16:12:02,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:02,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526080665] [2022-03-15 16:12:02,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:02,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:02,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:02,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526080665] [2022-03-15 16:12:02,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526080665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:02,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068019711] [2022-03-15 16:12:02,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:12:02,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:02,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:02,278 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:02,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-15 16:12:02,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:12:02,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:02,300 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:12:02,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:02,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:02,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:02,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:02,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:02,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:02,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:02,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:02,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:02,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:02,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:02,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:02,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:12:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:02,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:03,344 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:12:03,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:12:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:03,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068019711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:03,683 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:03,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-15 16:12:03,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687297191] [2022-03-15 16:12:03,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:03,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:12:03,683 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:03,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:12:03,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:12:03,684 INFO L87 Difference]: Start difference. First operand 4895 states and 11097 transitions. Second operand has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:04,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:04,921 INFO L93 Difference]: Finished difference Result 5878 states and 13166 transitions. [2022-03-15 16:12:04,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 16:12:04,921 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:12:04,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:04,928 INFO L225 Difference]: With dead ends: 5878 [2022-03-15 16:12:04,928 INFO L226 Difference]: Without dead ends: 5872 [2022-03-15 16:12:04,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=610, Invalid=4792, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:12:04,929 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 248 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:04,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 1392 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 650 Invalid, 0 Unknown, 233 Unchecked, 0.3s Time] [2022-03-15 16:12:04,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5872 states. [2022-03-15 16:12:04,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5872 to 5123. [2022-03-15 16:12:04,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5123 states, 5122 states have (on average 2.274306911362749) internal successors, (11649), 5122 states have internal predecessors, (11649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:04,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5123 states to 5123 states and 11649 transitions. [2022-03-15 16:12:04,986 INFO L78 Accepts]: Start accepts. Automaton has 5123 states and 11649 transitions. Word has length 34 [2022-03-15 16:12:04,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:04,986 INFO L470 AbstractCegarLoop]: Abstraction has 5123 states and 11649 transitions. [2022-03-15 16:12:04,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:04,986 INFO L276 IsEmpty]: Start isEmpty. Operand 5123 states and 11649 transitions. [2022-03-15 16:12:04,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:12:04,990 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:04,990 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:05,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-15 16:12:05,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:05,203 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:12:05,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:05,203 INFO L85 PathProgramCache]: Analyzing trace with hash 184831561, now seen corresponding path program 72 times [2022-03-15 16:12:05,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:05,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334499840] [2022-03-15 16:12:05,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:05,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:05,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:05,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334499840] [2022-03-15 16:12:05,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334499840] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:05,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906739762] [2022-03-15 16:12:05,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:12:05,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:05,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:05,436 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:05,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-15 16:12:05,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:12:05,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:05,457 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-15 16:12:05,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:05,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:05,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:05,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:05,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:05,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:05,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:05,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:05,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:05,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:05,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 28 [2022-03-15 16:12:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:05,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:06,468 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:12:06,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 78 treesize of output 188 [2022-03-15 16:12:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:06,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906739762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:06,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:06,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-15 16:12:06,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475033338] [2022-03-15 16:12:06,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:06,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:12:06,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:06,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:12:06,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:12:06,763 INFO L87 Difference]: Start difference. First operand 5123 states and 11649 transitions. Second operand has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:08,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:08,055 INFO L93 Difference]: Finished difference Result 6189 states and 13930 transitions. [2022-03-15 16:12:08,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 16:12:08,056 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:12:08,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:08,062 INFO L225 Difference]: With dead ends: 6189 [2022-03-15 16:12:08,062 INFO L226 Difference]: Without dead ends: 6177 [2022-03-15 16:12:08,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=701, Invalid=4701, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:12:08,062 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 226 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:08,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 1604 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 687 Invalid, 0 Unknown, 259 Unchecked, 0.3s Time] [2022-03-15 16:12:08,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6177 states. [2022-03-15 16:12:08,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6177 to 5392. [2022-03-15 16:12:08,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5392 states, 5391 states have (on average 2.2843628269337786) internal successors, (12315), 5391 states have internal predecessors, (12315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:08,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 12315 transitions. [2022-03-15 16:12:08,119 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 12315 transitions. Word has length 34 [2022-03-15 16:12:08,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:08,120 INFO L470 AbstractCegarLoop]: Abstraction has 5392 states and 12315 transitions. [2022-03-15 16:12:08,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:08,120 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 12315 transitions. [2022-03-15 16:12:08,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:12:08,124 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:08,124 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:08,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-15 16:12:08,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:08,324 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:12:08,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:08,325 INFO L85 PathProgramCache]: Analyzing trace with hash 73786001, now seen corresponding path program 73 times [2022-03-15 16:12:08,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:08,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786911251] [2022-03-15 16:12:08,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:08,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:08,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:08,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786911251] [2022-03-15 16:12:08,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786911251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:08,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136511295] [2022-03-15 16:12:08,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:12:08,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:08,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:08,528 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:08,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-15 16:12:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:08,550 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:12:08,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:09,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:09,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:09,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:09,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:09,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:09,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:09,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:09,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:09,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:09,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:09,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:09,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:09,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:12:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:09,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:09,574 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:12:09,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:12:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:09,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136511295] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:09,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:09,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-15 16:12:09,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37222087] [2022-03-15 16:12:09,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:09,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:12:09,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:09,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:12:09,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:12:09,944 INFO L87 Difference]: Start difference. First operand 5392 states and 12315 transitions. Second operand has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:11,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:11,310 INFO L93 Difference]: Finished difference Result 7513 states and 16901 transitions. [2022-03-15 16:12:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 16:12:11,311 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:12:11,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:11,320 INFO L225 Difference]: With dead ends: 7513 [2022-03-15 16:12:11,320 INFO L226 Difference]: Without dead ends: 7475 [2022-03-15 16:12:11,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=766, Invalid=4934, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 16:12:11,321 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 282 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 392 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:11,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 1695 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1066 Invalid, 0 Unknown, 392 Unchecked, 0.4s Time] [2022-03-15 16:12:11,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7475 states. [2022-03-15 16:12:11,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7475 to 5349. [2022-03-15 16:12:11,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5349 states, 5348 states have (on average 2.2840314136125652) internal successors, (12215), 5348 states have internal predecessors, (12215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:11,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5349 states to 5349 states and 12215 transitions. [2022-03-15 16:12:11,396 INFO L78 Accepts]: Start accepts. Automaton has 5349 states and 12215 transitions. Word has length 34 [2022-03-15 16:12:11,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:11,397 INFO L470 AbstractCegarLoop]: Abstraction has 5349 states and 12215 transitions. [2022-03-15 16:12:11,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:11,397 INFO L276 IsEmpty]: Start isEmpty. Operand 5349 states and 12215 transitions. [2022-03-15 16:12:11,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:12:11,401 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:11,401 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:11,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-15 16:12:11,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-15 16:12:11,601 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:12:11,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:11,602 INFO L85 PathProgramCache]: Analyzing trace with hash 543307891, now seen corresponding path program 74 times [2022-03-15 16:12:11,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:11,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062397172] [2022-03-15 16:12:11,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:11,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:12:11,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:11,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062397172] [2022-03-15 16:12:11,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062397172] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:11,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599886890] [2022-03-15 16:12:11,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:12:11,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:11,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:11,825 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:11,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-15 16:12:11,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:12:11,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:11,847 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:12:11,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:12,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:12,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:12,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:12,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:12,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:12,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:12,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:12,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:12,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:12,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:12:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:12:12,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:12,872 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:12:12,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:12:13,157 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:12:13,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599886890] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:13,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:13,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-03-15 16:12:13,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502144919] [2022-03-15 16:12:13,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:13,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:12:13,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:13,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:12:13,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:12:13,158 INFO L87 Difference]: Start difference. First operand 5349 states and 12215 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:13,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:13,946 INFO L93 Difference]: Finished difference Result 6607 states and 14884 transitions. [2022-03-15 16:12:13,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 16:12:13,947 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:12:13,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:13,955 INFO L225 Difference]: With dead ends: 6607 [2022-03-15 16:12:13,955 INFO L226 Difference]: Without dead ends: 6569 [2022-03-15 16:12:13,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=509, Invalid=3397, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 16:12:13,956 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 276 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:13,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 1047 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 425 Invalid, 0 Unknown, 187 Unchecked, 0.2s Time] [2022-03-15 16:12:13,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6569 states. [2022-03-15 16:12:14,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6569 to 5403. [2022-03-15 16:12:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5403 states, 5402 states have (on average 2.284524250277675) internal successors, (12341), 5402 states have internal predecessors, (12341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:14,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5403 states to 5403 states and 12341 transitions. [2022-03-15 16:12:14,033 INFO L78 Accepts]: Start accepts. Automaton has 5403 states and 12341 transitions. Word has length 34 [2022-03-15 16:12:14,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:14,033 INFO L470 AbstractCegarLoop]: Abstraction has 5403 states and 12341 transitions. [2022-03-15 16:12:14,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:14,034 INFO L276 IsEmpty]: Start isEmpty. Operand 5403 states and 12341 transitions. [2022-03-15 16:12:14,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:12:14,038 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:14,038 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:14,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-15 16:12:14,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-15 16:12:14,239 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:12:14,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:14,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1735633061, now seen corresponding path program 75 times [2022-03-15 16:12:14,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:14,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620439335] [2022-03-15 16:12:14,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:14,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:14,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:14,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620439335] [2022-03-15 16:12:14,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620439335] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:14,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512962449] [2022-03-15 16:12:14,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:12:14,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:14,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:14,464 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:14,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-15 16:12:14,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:12:14,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:14,486 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-15 16:12:14,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:14,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:14,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:14,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:14,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:14,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:14,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:14,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:14,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:14,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:14,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 28 [2022-03-15 16:12:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:14,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:15,479 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:12:15,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 78 treesize of output 188 [2022-03-15 16:12:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:15,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512962449] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:15,802 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:15,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2022-03-15 16:12:15,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474735108] [2022-03-15 16:12:15,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:15,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:12:15,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:15,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:12:15,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:12:15,803 INFO L87 Difference]: Start difference. First operand 5403 states and 12341 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:17,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:17,390 INFO L93 Difference]: Finished difference Result 7174 states and 16088 transitions. [2022-03-15 16:12:17,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-15 16:12:17,390 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:12:17,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:17,399 INFO L225 Difference]: With dead ends: 7174 [2022-03-15 16:12:17,400 INFO L226 Difference]: Without dead ends: 7129 [2022-03-15 16:12:17,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=741, Invalid=5111, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 16:12:17,400 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 286 mSDsluCounter, 1550 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1499 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:17,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 1499 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1023 Invalid, 0 Unknown, 191 Unchecked, 0.4s Time] [2022-03-15 16:12:17,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7129 states. [2022-03-15 16:12:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7129 to 5487. [2022-03-15 16:12:17,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5487 states, 5486 states have (on average 2.2869121399927086) internal successors, (12546), 5486 states have internal predecessors, (12546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:17,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5487 states to 5487 states and 12546 transitions. [2022-03-15 16:12:17,471 INFO L78 Accepts]: Start accepts. Automaton has 5487 states and 12546 transitions. Word has length 34 [2022-03-15 16:12:17,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:17,472 INFO L470 AbstractCegarLoop]: Abstraction has 5487 states and 12546 transitions. [2022-03-15 16:12:17,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:17,472 INFO L276 IsEmpty]: Start isEmpty. Operand 5487 states and 12546 transitions. [2022-03-15 16:12:17,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:12:17,476 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:17,476 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:17,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-15 16:12:17,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:17,677 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:12:17,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:17,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1707318499, now seen corresponding path program 76 times [2022-03-15 16:12:17,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:17,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770122031] [2022-03-15 16:12:17,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:17,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:12:17,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:17,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770122031] [2022-03-15 16:12:17,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770122031] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:17,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238809750] [2022-03-15 16:12:17,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:12:17,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:17,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:17,899 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:17,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-15 16:12:17,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:12:17,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:17,920 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:12:17,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:18,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:18,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:18,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:18,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:18,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:18,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:18,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:18,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:12:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:12:18,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:18,913 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:12:18,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:12:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:12:19,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238809750] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:19,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:19,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2022-03-15 16:12:19,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103788551] [2022-03-15 16:12:19,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:19,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:12:19,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:19,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:12:19,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:12:19,238 INFO L87 Difference]: Start difference. First operand 5487 states and 12546 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:20,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:20,868 INFO L93 Difference]: Finished difference Result 7261 states and 16306 transitions. [2022-03-15 16:12:20,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 16:12:20,868 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:12:20,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:20,878 INFO L225 Difference]: With dead ends: 7261 [2022-03-15 16:12:20,878 INFO L226 Difference]: Without dead ends: 7231 [2022-03-15 16:12:20,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=763, Invalid=5243, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 16:12:20,879 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 321 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:20,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 1640 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1071 Invalid, 0 Unknown, 363 Unchecked, 0.4s Time] [2022-03-15 16:12:20,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7231 states. [2022-03-15 16:12:20,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7231 to 5448. [2022-03-15 16:12:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5448 states, 5447 states have (on average 2.2865797686800073) internal successors, (12455), 5447 states have internal predecessors, (12455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:20,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5448 states to 5448 states and 12455 transitions. [2022-03-15 16:12:20,953 INFO L78 Accepts]: Start accepts. Automaton has 5448 states and 12455 transitions. Word has length 34 [2022-03-15 16:12:20,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:20,953 INFO L470 AbstractCegarLoop]: Abstraction has 5448 states and 12455 transitions. [2022-03-15 16:12:20,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:20,953 INFO L276 IsEmpty]: Start isEmpty. Operand 5448 states and 12455 transitions. [2022-03-15 16:12:20,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:12:20,957 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:20,957 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:20,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-15 16:12:21,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:21,165 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:12:21,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:21,165 INFO L85 PathProgramCache]: Analyzing trace with hash -2019499205, now seen corresponding path program 77 times [2022-03-15 16:12:21,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:21,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228515842] [2022-03-15 16:12:21,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:21,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:21,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:21,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228515842] [2022-03-15 16:12:21,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228515842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:21,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832609061] [2022-03-15 16:12:21,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:12:21,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:21,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:21,412 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:21,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-15 16:12:21,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:12:21,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:21,441 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:12:21,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:21,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:21,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:21,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:21,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:21,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:21,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:21,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:21,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:21,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:12:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:21,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:22,440 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:12:22,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:12:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:22,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832609061] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:22,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:22,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2022-03-15 16:12:22,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317643366] [2022-03-15 16:12:22,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:22,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:12:22,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:22,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:12:22,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:12:22,816 INFO L87 Difference]: Start difference. First operand 5448 states and 12455 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:24,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:24,049 INFO L93 Difference]: Finished difference Result 7052 states and 15862 transitions. [2022-03-15 16:12:24,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 16:12:24,050 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:12:24,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:24,058 INFO L225 Difference]: With dead ends: 7052 [2022-03-15 16:12:24,059 INFO L226 Difference]: Without dead ends: 7022 [2022-03-15 16:12:24,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=678, Invalid=4292, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 16:12:24,059 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 261 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:24,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 1260 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 687 Invalid, 0 Unknown, 271 Unchecked, 0.3s Time] [2022-03-15 16:12:24,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7022 states. [2022-03-15 16:12:24,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7022 to 5469. [2022-03-15 16:12:24,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5469 states, 5468 states have (on average 2.2867593269934163) internal successors, (12504), 5468 states have internal predecessors, (12504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:24,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5469 states to 5469 states and 12504 transitions. [2022-03-15 16:12:24,154 INFO L78 Accepts]: Start accepts. Automaton has 5469 states and 12504 transitions. Word has length 34 [2022-03-15 16:12:24,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:24,154 INFO L470 AbstractCegarLoop]: Abstraction has 5469 states and 12504 transitions. [2022-03-15 16:12:24,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:24,154 INFO L276 IsEmpty]: Start isEmpty. Operand 5469 states and 12504 transitions. [2022-03-15 16:12:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:12:24,158 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:24,158 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:24,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-15 16:12:24,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-03-15 16:12:24,359 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:12:24,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:24,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1167483469, now seen corresponding path program 78 times [2022-03-15 16:12:24,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:24,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760646027] [2022-03-15 16:12:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:24,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:24,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:24,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760646027] [2022-03-15 16:12:24,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760646027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:24,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867386642] [2022-03-15 16:12:24,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:12:24,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:24,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:24,588 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:24,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-15 16:12:24,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:12:24,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:24,619 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:12:24,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:25,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:25,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:25,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:25,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:25,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:25,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:25,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:25,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:12:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:25,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:25,635 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:12:25,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:12:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:25,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867386642] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:25,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:25,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2022-03-15 16:12:25,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870627916] [2022-03-15 16:12:25,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:25,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:12:25,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:25,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:12:25,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:12:25,830 INFO L87 Difference]: Start difference. First operand 5469 states and 12504 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:27,100 INFO L93 Difference]: Finished difference Result 7059 states and 15901 transitions. [2022-03-15 16:12:27,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:12:27,100 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:12:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:27,120 INFO L225 Difference]: With dead ends: 7059 [2022-03-15 16:12:27,120 INFO L226 Difference]: Without dead ends: 7029 [2022-03-15 16:12:27,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=581, Invalid=4111, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 16:12:27,121 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 306 mSDsluCounter, 1473 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:27,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 1438 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1011 Invalid, 0 Unknown, 177 Unchecked, 0.4s Time] [2022-03-15 16:12:27,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7029 states. [2022-03-15 16:12:27,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7029 to 5448. [2022-03-15 16:12:27,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5448 states, 5447 states have (on average 2.2865797686800073) internal successors, (12455), 5447 states have internal predecessors, (12455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5448 states to 5448 states and 12455 transitions. [2022-03-15 16:12:27,181 INFO L78 Accepts]: Start accepts. Automaton has 5448 states and 12455 transitions. Word has length 34 [2022-03-15 16:12:27,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:27,181 INFO L470 AbstractCegarLoop]: Abstraction has 5448 states and 12455 transitions. [2022-03-15 16:12:27,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:27,182 INFO L276 IsEmpty]: Start isEmpty. Operand 5448 states and 12455 transitions. [2022-03-15 16:12:27,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:12:27,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:27,186 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:27,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-15 16:12:27,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:27,386 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:12:27,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:27,387 INFO L85 PathProgramCache]: Analyzing trace with hash 853669661, now seen corresponding path program 79 times [2022-03-15 16:12:27,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:27,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595935141] [2022-03-15 16:12:27,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:27,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:27,595 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:12:27,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:27,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595935141] [2022-03-15 16:12:27,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595935141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:27,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948356948] [2022-03-15 16:12:27,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:12:27,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:27,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:27,596 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:27,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-15 16:12:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:27,617 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:12:27,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:28,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:28,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:28,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:28,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:28,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:28,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:28,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:28,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:28,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:28,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:12:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:12:28,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:28,607 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:12:28,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:12:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:12:28,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948356948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:28,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:28,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2022-03-15 16:12:28,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749105424] [2022-03-15 16:12:28,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:28,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:12:28,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:28,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:12:28,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:12:28,917 INFO L87 Difference]: Start difference. First operand 5448 states and 12455 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:30,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:30,461 INFO L93 Difference]: Finished difference Result 7223 states and 16277 transitions. [2022-03-15 16:12:30,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 16:12:30,461 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:12:30,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:30,470 INFO L225 Difference]: With dead ends: 7223 [2022-03-15 16:12:30,471 INFO L226 Difference]: Without dead ends: 7163 [2022-03-15 16:12:30,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1772 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=775, Invalid=5545, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 16:12:30,471 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 320 mSDsluCounter, 1618 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:30,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 1585 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 926 Invalid, 0 Unknown, 245 Unchecked, 0.4s Time] [2022-03-15 16:12:30,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7163 states. [2022-03-15 16:12:30,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7163 to 5478. [2022-03-15 16:12:30,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 2.2870184407522367) internal successors, (12526), 5477 states have internal predecessors, (12526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:30,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 12526 transitions. [2022-03-15 16:12:30,544 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 12526 transitions. Word has length 34 [2022-03-15 16:12:30,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:30,544 INFO L470 AbstractCegarLoop]: Abstraction has 5478 states and 12526 transitions. [2022-03-15 16:12:30,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:30,544 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 12526 transitions. [2022-03-15 16:12:30,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 16:12:30,549 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:30,549 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:30,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-15 16:12:30,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:30,749 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:12:30,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:30,750 INFO L85 PathProgramCache]: Analyzing trace with hash -809007139, now seen corresponding path program 80 times [2022-03-15 16:12:30,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:30,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732530099] [2022-03-15 16:12:30,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:30,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:12:30,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:30,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732530099] [2022-03-15 16:12:30,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732530099] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:30,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417065774] [2022-03-15 16:12:30,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:12:30,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:30,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:30,988 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:30,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-15 16:12:31,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:12:31,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:31,009 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 16:12:31,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:31,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:31,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:31,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:31,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:31,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:31,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:31,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:31,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:31,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:31,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 28 [2022-03-15 16:12:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:12:31,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:31,991 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 16:12:31,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 186 [2022-03-15 16:12:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:12:32,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417065774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:32,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:32,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2022-03-15 16:12:32,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110449951] [2022-03-15 16:12:32,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:32,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:12:32,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:32,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:12:32,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:12:32,232 INFO L87 Difference]: Start difference. First operand 5478 states and 12526 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:33,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:33,468 INFO L93 Difference]: Finished difference Result 7145 states and 16066 transitions. [2022-03-15 16:12:33,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 16:12:33,469 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 16:12:33,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:33,477 INFO L225 Difference]: With dead ends: 7145 [2022-03-15 16:12:33,477 INFO L226 Difference]: Without dead ends: 7115 [2022-03-15 16:12:33,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=738, Invalid=4664, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 16:12:33,478 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 348 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:33,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 1116 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 727 Invalid, 0 Unknown, 163 Unchecked, 0.3s Time] [2022-03-15 16:12:33,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7115 states. [2022-03-15 16:12:33,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7115 to 5511. [2022-03-15 16:12:33,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5511 states, 5510 states have (on average 2.287295825771325) internal successors, (12603), 5510 states have internal predecessors, (12603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:33,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5511 states to 5511 states and 12603 transitions. [2022-03-15 16:12:33,566 INFO L78 Accepts]: Start accepts. Automaton has 5511 states and 12603 transitions. Word has length 34 [2022-03-15 16:12:33,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:33,566 INFO L470 AbstractCegarLoop]: Abstraction has 5511 states and 12603 transitions. [2022-03-15 16:12:33,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:33,566 INFO L276 IsEmpty]: Start isEmpty. Operand 5511 states and 12603 transitions. [2022-03-15 16:12:33,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:12:33,570 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:33,571 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:33,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-15 16:12:33,771 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,SelfDestructingSolverStorable85 [2022-03-15 16:12:33,771 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:12:33,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:33,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1907210588, now seen corresponding path program 81 times [2022-03-15 16:12:33,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:33,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868640699] [2022-03-15 16:12:33,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:33,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:12:33,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:33,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868640699] [2022-03-15 16:12:33,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868640699] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:33,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436815681] [2022-03-15 16:12:33,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:12:33,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:33,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:33,998 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:33,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-15 16:12:34,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:12:34,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:34,021 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:12:34,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:34,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:34,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:34,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:34,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:34,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:34,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:34,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:34,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:34,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:34,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:34,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:34,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:34,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:34,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:34,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:34,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:34,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:34,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:34,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:34,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:34,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:34,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:34,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:34,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:12:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:34,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:35,498 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:12:35,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:12:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:35,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436815681] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:35,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:35,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-03-15 16:12:35,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849536862] [2022-03-15 16:12:35,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:35,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:12:35,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:35,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:12:35,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1898, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:12:35,984 INFO L87 Difference]: Start difference. First operand 5511 states and 12603 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:39,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:39,391 INFO L93 Difference]: Finished difference Result 11268 states and 25226 transitions. [2022-03-15 16:12:39,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-15 16:12:39,391 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:12:39,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:39,409 INFO L225 Difference]: With dead ends: 11268 [2022-03-15 16:12:39,409 INFO L226 Difference]: Without dead ends: 11164 [2022-03-15 16:12:39,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4432 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1245, Invalid=12095, Unknown=0, NotChecked=0, Total=13340 [2022-03-15 16:12:39,410 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 607 mSDsluCounter, 2201 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 2109 SdHoareTripleChecker+Invalid, 1944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:39,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 2109 Invalid, 1944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1465 Invalid, 0 Unknown, 288 Unchecked, 0.7s Time] [2022-03-15 16:12:39,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11164 states. [2022-03-15 16:12:39,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11164 to 5881. [2022-03-15 16:12:39,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5881 states, 5880 states have (on average 2.281122448979592) internal successors, (13413), 5880 states have internal predecessors, (13413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:39,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5881 states to 5881 states and 13413 transitions. [2022-03-15 16:12:39,511 INFO L78 Accepts]: Start accepts. Automaton has 5881 states and 13413 transitions. Word has length 36 [2022-03-15 16:12:39,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:39,511 INFO L470 AbstractCegarLoop]: Abstraction has 5881 states and 13413 transitions. [2022-03-15 16:12:39,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:39,511 INFO L276 IsEmpty]: Start isEmpty. Operand 5881 states and 13413 transitions. [2022-03-15 16:12:39,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:12:39,516 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:39,516 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:39,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-15 16:12:39,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:39,717 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:12:39,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:39,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1847921678, now seen corresponding path program 82 times [2022-03-15 16:12:39,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:39,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070373721] [2022-03-15 16:12:39,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:39,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:12:39,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:39,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070373721] [2022-03-15 16:12:39,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070373721] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:39,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615546216] [2022-03-15 16:12:39,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:12:39,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:39,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:39,977 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:39,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-15 16:12:39,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:12:39,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:40,000 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:12:40,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:40,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:40,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:40,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:40,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:40,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:40,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:40,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:40,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:40,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:40,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:40,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:40,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:40,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:40,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:40,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:40,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:40,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:40,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:40,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:40,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:40,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:12:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:40,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:41,543 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:12:41,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:12:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:42,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615546216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:42,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:42,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-03-15 16:12:42,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966992073] [2022-03-15 16:12:42,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:42,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:12:42,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:42,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:12:42,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1909, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:12:42,033 INFO L87 Difference]: Start difference. First operand 5881 states and 13413 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:46,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:46,169 INFO L93 Difference]: Finished difference Result 10957 states and 24403 transitions. [2022-03-15 16:12:46,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-15 16:12:46,170 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:12:46,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:46,184 INFO L225 Difference]: With dead ends: 10957 [2022-03-15 16:12:46,185 INFO L226 Difference]: Without dead ends: 10900 [2022-03-15 16:12:46,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6584 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1464, Invalid=17442, Unknown=0, NotChecked=0, Total=18906 [2022-03-15 16:12:46,186 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 475 mSDsluCounter, 2970 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 2844 SdHoareTripleChecker+Invalid, 2430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 435 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:46,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 2844 Invalid, 2430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1829 Invalid, 0 Unknown, 435 Unchecked, 0.9s Time] [2022-03-15 16:12:46,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10900 states. [2022-03-15 16:12:46,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10900 to 6936. [2022-03-15 16:12:46,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6936 states, 6935 states have (on average 2.2842105263157895) internal successors, (15841), 6935 states have internal predecessors, (15841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6936 states to 6936 states and 15841 transitions. [2022-03-15 16:12:46,295 INFO L78 Accepts]: Start accepts. Automaton has 6936 states and 15841 transitions. Word has length 36 [2022-03-15 16:12:46,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:46,295 INFO L470 AbstractCegarLoop]: Abstraction has 6936 states and 15841 transitions. [2022-03-15 16:12:46,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:46,295 INFO L276 IsEmpty]: Start isEmpty. Operand 6936 states and 15841 transitions. [2022-03-15 16:12:46,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:12:46,301 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:46,301 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:46,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-15 16:12:46,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:46,501 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:12:46,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:46,502 INFO L85 PathProgramCache]: Analyzing trace with hash 173231452, now seen corresponding path program 83 times [2022-03-15 16:12:46,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:46,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703786406] [2022-03-15 16:12:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:46,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:12:46,759 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:46,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703786406] [2022-03-15 16:12:46,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703786406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:46,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515831340] [2022-03-15 16:12:46,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:12:46,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:46,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:46,761 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:46,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-15 16:12:46,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:12:46,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:46,785 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-15 16:12:46,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:47,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:47,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:47,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:47,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:47,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:47,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:47,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:47,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:47,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:47,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:47,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:47,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:47,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:47,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:47,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:47,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:47,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:47,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:47,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:47,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:47,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:47,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:47,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:47,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:47,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:12:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:47,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:48,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:48,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:12:48,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 208 [2022-03-15 16:12:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:48,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515831340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:48,364 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:48,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 47 [2022-03-15 16:12:48,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031105066] [2022-03-15 16:12:48,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:48,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:12:48,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:48,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:12:48,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1983, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:12:48,365 INFO L87 Difference]: Start difference. First operand 6936 states and 15841 transitions. Second operand has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:52,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:52,008 INFO L93 Difference]: Finished difference Result 11279 states and 25304 transitions. [2022-03-15 16:12:52,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-15 16:12:52,008 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:12:52,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:52,022 INFO L225 Difference]: With dead ends: 11279 [2022-03-15 16:12:52,022 INFO L226 Difference]: Without dead ends: 11242 [2022-03-15 16:12:52,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6404 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1357, Invalid=17003, Unknown=0, NotChecked=0, Total=18360 [2022-03-15 16:12:52,023 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 609 mSDsluCounter, 2556 mSDsCounter, 0 mSdLazyCounter, 1683 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 2545 SdHoareTripleChecker+Invalid, 2175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:52,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 2545 Invalid, 2175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1683 Invalid, 0 Unknown, 326 Unchecked, 0.8s Time] [2022-03-15 16:12:52,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11242 states. [2022-03-15 16:12:52,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11242 to 7488. [2022-03-15 16:12:52,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7488 states, 7487 states have (on average 2.290102844931214) internal successors, (17146), 7487 states have internal predecessors, (17146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:52,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7488 states to 7488 states and 17146 transitions. [2022-03-15 16:12:52,141 INFO L78 Accepts]: Start accepts. Automaton has 7488 states and 17146 transitions. Word has length 36 [2022-03-15 16:12:52,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:52,141 INFO L470 AbstractCegarLoop]: Abstraction has 7488 states and 17146 transitions. [2022-03-15 16:12:52,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:52,141 INFO L276 IsEmpty]: Start isEmpty. Operand 7488 states and 17146 transitions. [2022-03-15 16:12:52,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:12:52,147 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:52,147 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:52,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-15 16:12:52,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-15 16:12:52,347 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:12:52,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:52,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1791984684, now seen corresponding path program 84 times [2022-03-15 16:12:52,347 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:52,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821967707] [2022-03-15 16:12:52,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:52,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:52,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:52,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821967707] [2022-03-15 16:12:52,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821967707] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:52,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124974358] [2022-03-15 16:12:52,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:12:52,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:52,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:52,582 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:52,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-15 16:12:52,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 16:12:52,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:12:52,604 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:12:52,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:12:53,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:53,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:53,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:53,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:53,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:53,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:53,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:53,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:53,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:53,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:53,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:53,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:53,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:53,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:53,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:53,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:53,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:53,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:53,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:12:53,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:12:53,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:12:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:53,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:12:54,104 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:12:54,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:12:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:54,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124974358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:12:54,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:12:54,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 47 [2022-03-15 16:12:54,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466910009] [2022-03-15 16:12:54,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:12:54,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:12:54,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:12:54,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:12:54,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1986, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:12:54,674 INFO L87 Difference]: Start difference. First operand 7488 states and 17146 transitions. Second operand has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:58,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:12:58,815 INFO L93 Difference]: Finished difference Result 14335 states and 32214 transitions. [2022-03-15 16:12:58,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-15 16:12:58,816 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:12:58,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:12:58,836 INFO L225 Difference]: With dead ends: 14335 [2022-03-15 16:12:58,836 INFO L226 Difference]: Without dead ends: 14163 [2022-03-15 16:12:58,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5820 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1543, Invalid=15487, Unknown=0, NotChecked=0, Total=17030 [2022-03-15 16:12:58,837 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 632 mSDsluCounter, 2358 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 2154 SdHoareTripleChecker+Invalid, 2103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 338 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:12:58,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 2154 Invalid, 2103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1525 Invalid, 0 Unknown, 338 Unchecked, 0.8s Time] [2022-03-15 16:12:58,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14163 states. [2022-03-15 16:12:58,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14163 to 8272. [2022-03-15 16:12:58,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8272 states, 8271 states have (on average 2.2925885624471043) internal successors, (18962), 8271 states have internal predecessors, (18962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:58,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8272 states to 8272 states and 18962 transitions. [2022-03-15 16:12:58,976 INFO L78 Accepts]: Start accepts. Automaton has 8272 states and 18962 transitions. Word has length 36 [2022-03-15 16:12:58,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:12:58,976 INFO L470 AbstractCegarLoop]: Abstraction has 8272 states and 18962 transitions. [2022-03-15 16:12:58,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:12:58,976 INFO L276 IsEmpty]: Start isEmpty. Operand 8272 states and 18962 transitions. [2022-03-15 16:12:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:12:58,983 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:12:58,983 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:12:58,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-15 16:12:59,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:59,183 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:12:59,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:12:59,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1252149654, now seen corresponding path program 85 times [2022-03-15 16:12:59,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:12:59,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986617210] [2022-03-15 16:12:59,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:12:59,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:12:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:12:59,422 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:12:59,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986617210] [2022-03-15 16:12:59,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986617210] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:12:59,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757191385] [2022-03-15 16:12:59,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:12:59,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:12:59,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:12:59,424 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:12:59,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-15 16:12:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:12:59,444 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:12:59,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:00,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:00,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:00,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:00,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:00,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:00,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:00,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:00,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:00,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:00,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:00,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:00,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:00,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:00,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:00,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:00,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:00,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:00,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:00,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:00,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:00,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:13:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:00,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:00,953 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:13:00,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:13:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:01,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757191385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:01,320 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:01,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 47 [2022-03-15 16:13:01,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999842823] [2022-03-15 16:13:01,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:01,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:13:01,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:01,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:13:01,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=2001, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:13:01,320 INFO L87 Difference]: Start difference. First operand 8272 states and 18962 transitions. Second operand has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:06,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:06,722 INFO L93 Difference]: Finished difference Result 16328 states and 36925 transitions. [2022-03-15 16:13:06,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-03-15 16:13:06,722 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:13:06,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:06,747 INFO L225 Difference]: With dead ends: 16328 [2022-03-15 16:13:06,748 INFO L226 Difference]: Without dead ends: 16138 [2022-03-15 16:13:06,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7375 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1863, Invalid=19307, Unknown=0, NotChecked=0, Total=21170 [2022-03-15 16:13:06,749 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 716 mSDsluCounter, 2575 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 2316 SdHoareTripleChecker+Invalid, 2346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 376 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:06,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [716 Valid, 2316 Invalid, 2346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1696 Invalid, 0 Unknown, 376 Unchecked, 0.9s Time] [2022-03-15 16:13:06,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2022-03-15 16:13:06,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 7323. [2022-03-15 16:13:06,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7323 states, 7322 states have (on average 2.2746517344987707) internal successors, (16655), 7322 states have internal predecessors, (16655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:06,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7323 states to 7323 states and 16655 transitions. [2022-03-15 16:13:06,893 INFO L78 Accepts]: Start accepts. Automaton has 7323 states and 16655 transitions. Word has length 36 [2022-03-15 16:13:06,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:06,893 INFO L470 AbstractCegarLoop]: Abstraction has 7323 states and 16655 transitions. [2022-03-15 16:13:06,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:06,894 INFO L276 IsEmpty]: Start isEmpty. Operand 7323 states and 16655 transitions. [2022-03-15 16:13:06,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:13:06,899 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:06,899 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:06,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-15 16:13:07,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:07,115 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:07,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:07,115 INFO L85 PathProgramCache]: Analyzing trace with hash 769003476, now seen corresponding path program 86 times [2022-03-15 16:13:07,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:07,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402483089] [2022-03-15 16:13:07,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:07,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:07,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:07,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402483089] [2022-03-15 16:13:07,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402483089] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:07,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195360979] [2022-03-15 16:13:07,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:13:07,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:07,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:07,355 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:07,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-15 16:13:07,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:13:07,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:07,376 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:13:07,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:08,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:08,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:08,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:08,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:08,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:08,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:08,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:08,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:08,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:08,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:08,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:08,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:08,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:08,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:08,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:08,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:08,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:08,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:08,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:08,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:08,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:08,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:08,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:08,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:13:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:08,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:08,939 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:13:08,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:13:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:09,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195360979] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:09,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:09,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 47 [2022-03-15 16:13:09,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437346422] [2022-03-15 16:13:09,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:09,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:13:09,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:09,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:13:09,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2007, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:13:09,650 INFO L87 Difference]: Start difference. First operand 7323 states and 16655 transitions. Second operand has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:14,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:14,032 INFO L93 Difference]: Finished difference Result 12970 states and 29038 transitions. [2022-03-15 16:13:14,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-15 16:13:14,032 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:13:14,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:14,048 INFO L225 Difference]: With dead ends: 12970 [2022-03-15 16:13:14,048 INFO L226 Difference]: Without dead ends: 12919 [2022-03-15 16:13:14,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5793 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1512, Invalid=15780, Unknown=0, NotChecked=0, Total=17292 [2022-03-15 16:13:14,049 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 646 mSDsluCounter, 2981 mSDsCounter, 0 mSdLazyCounter, 1846 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 2896 SdHoareTripleChecker+Invalid, 2660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 605 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:14,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 2896 Invalid, 2660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1846 Invalid, 0 Unknown, 605 Unchecked, 0.9s Time] [2022-03-15 16:13:14,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12919 states. [2022-03-15 16:13:14,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12919 to 7378. [2022-03-15 16:13:14,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7378 states, 7377 states have (on average 2.2727395960417516) internal successors, (16766), 7377 states have internal predecessors, (16766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:14,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7378 states to 7378 states and 16766 transitions. [2022-03-15 16:13:14,169 INFO L78 Accepts]: Start accepts. Automaton has 7378 states and 16766 transitions. Word has length 36 [2022-03-15 16:13:14,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:14,169 INFO L470 AbstractCegarLoop]: Abstraction has 7378 states and 16766 transitions. [2022-03-15 16:13:14,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:14,170 INFO L276 IsEmpty]: Start isEmpty. Operand 7378 states and 16766 transitions. [2022-03-15 16:13:14,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:13:14,175 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:14,176 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:14,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-15 16:13:14,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:14,376 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:14,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:14,376 INFO L85 PathProgramCache]: Analyzing trace with hash 625140816, now seen corresponding path program 87 times [2022-03-15 16:13:14,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:14,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296985346] [2022-03-15 16:13:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:14,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:13:14,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:14,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296985346] [2022-03-15 16:13:14,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296985346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:14,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545311697] [2022-03-15 16:13:14,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:13:14,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:14,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:14,605 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:14,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-15 16:13:14,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:13:14,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:14,630 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-15 16:13:14,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:15,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:15,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:15,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:15,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:15,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:15,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:15,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:15,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:15,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:15,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:15,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:15,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:15,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:15,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:15,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:15,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:15,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:15,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:15,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 35 [2022-03-15 16:13:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:15,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:15,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:15,988 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:13:15,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 208 [2022-03-15 16:13:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:16,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545311697] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:16,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:16,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 46 [2022-03-15 16:13:16,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689415122] [2022-03-15 16:13:16,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:16,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:13:16,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:16,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:13:16,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1855, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:13:16,318 INFO L87 Difference]: Start difference. First operand 7378 states and 16766 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:20,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:20,668 INFO L93 Difference]: Finished difference Result 12398 states and 27515 transitions. [2022-03-15 16:13:20,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-15 16:13:20,669 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:13:20,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:20,687 INFO L225 Difference]: With dead ends: 12398 [2022-03-15 16:13:20,687 INFO L226 Difference]: Without dead ends: 11911 [2022-03-15 16:13:20,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5731 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1711, Invalid=15059, Unknown=0, NotChecked=0, Total=16770 [2022-03-15 16:13:20,688 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 920 mSDsluCounter, 2715 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 2224 SdHoareTripleChecker+Invalid, 2283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:20,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [920 Valid, 2224 Invalid, 2283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1718 Invalid, 0 Unknown, 254 Unchecked, 0.9s Time] [2022-03-15 16:13:20,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11911 states. [2022-03-15 16:13:20,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11911 to 7872. [2022-03-15 16:13:20,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7872 states, 7871 states have (on average 2.2759496887307837) internal successors, (17914), 7871 states have internal predecessors, (17914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7872 states to 7872 states and 17914 transitions. [2022-03-15 16:13:20,815 INFO L78 Accepts]: Start accepts. Automaton has 7872 states and 17914 transitions. Word has length 36 [2022-03-15 16:13:20,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:20,815 INFO L470 AbstractCegarLoop]: Abstraction has 7872 states and 17914 transitions. [2022-03-15 16:13:20,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:20,815 INFO L276 IsEmpty]: Start isEmpty. Operand 7872 states and 17914 transitions. [2022-03-15 16:13:20,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:13:20,821 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:20,821 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:20,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-15 16:13:21,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2022-03-15 16:13:21,022 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:21,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:21,022 INFO L85 PathProgramCache]: Analyzing trace with hash 2079756346, now seen corresponding path program 88 times [2022-03-15 16:13:21,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:21,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013903368] [2022-03-15 16:13:21,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:21,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:21,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:21,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013903368] [2022-03-15 16:13:21,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013903368] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:21,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876311669] [2022-03-15 16:13:21,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:13:21,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:21,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:21,271 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:21,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-15 16:13:21,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:13:21,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:21,293 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:13:21,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:21,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:21,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:21,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:21,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:21,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:21,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:21,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:21,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:21,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:21,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:21,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:21,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:21,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:21,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:21,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:21,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:21,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:21,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:21,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:21,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:21,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:13:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:22,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:22,779 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:13:22,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:13:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:23,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876311669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:23,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:23,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-03-15 16:13:23,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463657426] [2022-03-15 16:13:23,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:23,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:13:23,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:23,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:13:23,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:13:23,191 INFO L87 Difference]: Start difference. First operand 7872 states and 17914 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:27,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:27,674 INFO L93 Difference]: Finished difference Result 13111 states and 29204 transitions. [2022-03-15 16:13:27,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-15 16:13:27,674 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:13:27,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:27,693 INFO L225 Difference]: With dead ends: 13111 [2022-03-15 16:13:27,693 INFO L226 Difference]: Without dead ends: 12981 [2022-03-15 16:13:27,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6258 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1734, Invalid=16356, Unknown=0, NotChecked=0, Total=18090 [2022-03-15 16:13:27,695 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 690 mSDsluCounter, 2418 mSDsCounter, 0 mSdLazyCounter, 1690 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 2234 SdHoareTripleChecker+Invalid, 2268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 1690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:27,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 2234 Invalid, 2268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 1690 Invalid, 0 Unknown, 279 Unchecked, 0.8s Time] [2022-03-15 16:13:27,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12981 states. [2022-03-15 16:13:27,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12981 to 7821. [2022-03-15 16:13:27,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7821 states, 7820 states have (on average 2.2740409207161125) internal successors, (17783), 7820 states have internal predecessors, (17783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:27,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7821 states to 7821 states and 17783 transitions. [2022-03-15 16:13:27,828 INFO L78 Accepts]: Start accepts. Automaton has 7821 states and 17783 transitions. Word has length 36 [2022-03-15 16:13:27,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:27,828 INFO L470 AbstractCegarLoop]: Abstraction has 7821 states and 17783 transitions. [2022-03-15 16:13:27,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:27,828 INFO L276 IsEmpty]: Start isEmpty. Operand 7821 states and 17783 transitions. [2022-03-15 16:13:27,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:13:27,834 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:27,834 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:27,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:28,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:28,035 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:28,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:28,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1363195214, now seen corresponding path program 89 times [2022-03-15 16:13:28,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:28,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813481767] [2022-03-15 16:13:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:28,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:28,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:28,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813481767] [2022-03-15 16:13:28,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813481767] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:28,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345577303] [2022-03-15 16:13:28,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:13:28,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:28,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:28,288 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:28,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-15 16:13:28,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:13:28,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:28,320 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:13:28,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:28,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:28,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:28,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:28,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:28,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:28,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:28,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 26 [2022-03-15 16:13:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:29,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:29,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:29,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:13:29,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 208 [2022-03-15 16:13:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:30,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345577303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:30,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:30,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 50 [2022-03-15 16:13:30,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893629288] [2022-03-15 16:13:30,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:30,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-15 16:13:30,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:30,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-15 16:13:30,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2250, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 16:13:30,041 INFO L87 Difference]: Start difference. First operand 7821 states and 17783 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:35,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:35,316 INFO L93 Difference]: Finished difference Result 14235 states and 31716 transitions. [2022-03-15 16:13:35,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-03-15 16:13:35,316 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:13:35,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:35,337 INFO L225 Difference]: With dead ends: 14235 [2022-03-15 16:13:35,337 INFO L226 Difference]: Without dead ends: 14164 [2022-03-15 16:13:35,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8891 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2292, Invalid=23790, Unknown=0, NotChecked=0, Total=26082 [2022-03-15 16:13:35,339 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 448 mSDsluCounter, 2481 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 2418 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 331 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:35,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 2418 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1666 Invalid, 0 Unknown, 331 Unchecked, 0.8s Time] [2022-03-15 16:13:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14164 states. [2022-03-15 16:13:35,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14164 to 8944. [2022-03-15 16:13:35,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8944 states, 8943 states have (on average 2.2676954042267696) internal successors, (20280), 8943 states have internal predecessors, (20280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:35,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8944 states to 8944 states and 20280 transitions. [2022-03-15 16:13:35,490 INFO L78 Accepts]: Start accepts. Automaton has 8944 states and 20280 transitions. Word has length 36 [2022-03-15 16:13:35,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:35,490 INFO L470 AbstractCegarLoop]: Abstraction has 8944 states and 20280 transitions. [2022-03-15 16:13:35,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:35,490 INFO L276 IsEmpty]: Start isEmpty. Operand 8944 states and 20280 transitions. [2022-03-15 16:13:35,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:13:35,498 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:35,498 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:35,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:35,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:35,698 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:35,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:35,699 INFO L85 PathProgramCache]: Analyzing trace with hash 657957916, now seen corresponding path program 90 times [2022-03-15 16:13:35,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:35,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399493167] [2022-03-15 16:13:35,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:35,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:35,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:35,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399493167] [2022-03-15 16:13:35,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399493167] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:35,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930831078] [2022-03-15 16:13:35,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:13:35,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:35,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:35,975 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:35,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-15 16:13:35,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:13:35,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:35,999 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:13:35,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:37,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:37,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:37,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:37,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:37,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:37,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:37,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:37,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:37,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:37,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:37,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:37,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:37,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:37,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:37,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:37,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:37,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:37,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:37,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:37,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:37,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:37,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:37,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 33 [2022-03-15 16:13:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:37,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:39,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:39,382 INFO L353 Elim1Store]: treesize reduction 46, result has 76.4 percent of original size [2022-03-15 16:13:39,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 88 treesize of output 188 [2022-03-15 16:13:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:40,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930831078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:40,153 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:40,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-03-15 16:13:40,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682283340] [2022-03-15 16:13:40,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:40,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-15 16:13:40,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:40,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-15 16:13:40,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1977, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:13:40,154 INFO L87 Difference]: Start difference. First operand 8944 states and 20280 transitions. Second operand has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:43,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:43,181 INFO L93 Difference]: Finished difference Result 9813 states and 22123 transitions. [2022-03-15 16:13:43,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:13:43,181 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:13:43,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:43,194 INFO L225 Difference]: With dead ends: 9813 [2022-03-15 16:13:43,194 INFO L226 Difference]: Without dead ends: 9792 [2022-03-15 16:13:43,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=783, Invalid=5537, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 16:13:43,195 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 391 mSDsluCounter, 1392 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1303 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 723 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:43,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 1303 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 263 Invalid, 0 Unknown, 723 Unchecked, 0.1s Time] [2022-03-15 16:13:43,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9792 states. [2022-03-15 16:13:43,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9792 to 9108. [2022-03-15 16:13:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9108 states, 9107 states have (on average 2.270121884264851) internal successors, (20674), 9107 states have internal predecessors, (20674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:43,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9108 states to 9108 states and 20674 transitions. [2022-03-15 16:13:43,311 INFO L78 Accepts]: Start accepts. Automaton has 9108 states and 20674 transitions. Word has length 36 [2022-03-15 16:13:43,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:43,311 INFO L470 AbstractCegarLoop]: Abstraction has 9108 states and 20674 transitions. [2022-03-15 16:13:43,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:43,311 INFO L276 IsEmpty]: Start isEmpty. Operand 9108 states and 20674 transitions. [2022-03-15 16:13:43,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:13:43,320 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:43,320 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:43,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:43,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:43,520 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:43,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:43,520 INFO L85 PathProgramCache]: Analyzing trace with hash -893673324, now seen corresponding path program 91 times [2022-03-15 16:13:43,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:43,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598924357] [2022-03-15 16:13:43,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:43,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:43,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:43,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598924357] [2022-03-15 16:13:43,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598924357] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:43,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031135559] [2022-03-15 16:13:43,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:13:43,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:43,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:43,786 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:43,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-15 16:13:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:43,806 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:13:43,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:44,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:44,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:44,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:44,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:44,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:44,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:13:44,562 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:44,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:45,368 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:13:45,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:13:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:45,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031135559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:45,835 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:45,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 47 [2022-03-15 16:13:45,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611246910] [2022-03-15 16:13:45,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:45,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:13:45,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:45,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:13:45,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=2000, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:13:45,837 INFO L87 Difference]: Start difference. First operand 9108 states and 20674 transitions. Second operand has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:49,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:49,452 INFO L93 Difference]: Finished difference Result 14476 states and 32449 transitions. [2022-03-15 16:13:49,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-15 16:13:49,453 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:13:49,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:49,471 INFO L225 Difference]: With dead ends: 14476 [2022-03-15 16:13:49,471 INFO L226 Difference]: Without dead ends: 14430 [2022-03-15 16:13:49,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5479 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1550, Invalid=15220, Unknown=0, NotChecked=0, Total=16770 [2022-03-15 16:13:49,472 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 465 mSDsluCounter, 2625 mSDsCounter, 0 mSdLazyCounter, 1668 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 2596 SdHoareTripleChecker+Invalid, 2349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 549 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:49,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 2596 Invalid, 2349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1668 Invalid, 0 Unknown, 549 Unchecked, 0.8s Time] [2022-03-15 16:13:49,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14430 states. [2022-03-15 16:13:49,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14430 to 9246. [2022-03-15 16:13:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9246 states, 9245 states have (on average 2.27052460789616) internal successors, (20991), 9245 states have internal predecessors, (20991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9246 states to 9246 states and 20991 transitions. [2022-03-15 16:13:49,618 INFO L78 Accepts]: Start accepts. Automaton has 9246 states and 20991 transitions. Word has length 36 [2022-03-15 16:13:49,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:49,618 INFO L470 AbstractCegarLoop]: Abstraction has 9246 states and 20991 transitions. [2022-03-15 16:13:49,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:49,618 INFO L276 IsEmpty]: Start isEmpty. Operand 9246 states and 20991 transitions. [2022-03-15 16:13:49,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:13:49,626 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:49,626 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:49,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-15 16:13:49,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:49,826 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:49,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:49,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1150667582, now seen corresponding path program 92 times [2022-03-15 16:13:49,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:49,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824358383] [2022-03-15 16:13:49,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:49,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:13:50,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:50,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824358383] [2022-03-15 16:13:50,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824358383] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:50,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860794026] [2022-03-15 16:13:50,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:13:50,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:50,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:50,059 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:50,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-15 16:13:50,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:13:50,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:50,082 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:13:50,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:50,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:50,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:50,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:50,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:50,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:50,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:50,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:50,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:50,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:50,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:50,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:50,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:50,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:50,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:50,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:50,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:50,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:50,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:50,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:50,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:50,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:50,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:13:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:50,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:51,554 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:13:51,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:13:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:52,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860794026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:13:52,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:13:52,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-03-15 16:13:52,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840193174] [2022-03-15 16:13:52,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:13:52,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:13:52,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:13:52,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:13:52,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1722, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:13:52,109 INFO L87 Difference]: Start difference. First operand 9246 states and 20991 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:55,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:13:55,744 INFO L93 Difference]: Finished difference Result 15390 states and 34443 transitions. [2022-03-15 16:13:55,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-15 16:13:55,745 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:13:55,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:13:55,767 INFO L225 Difference]: With dead ends: 15390 [2022-03-15 16:13:55,768 INFO L226 Difference]: Without dead ends: 15239 [2022-03-15 16:13:55,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5866 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1817, Invalid=15475, Unknown=0, NotChecked=0, Total=17292 [2022-03-15 16:13:55,769 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 501 mSDsluCounter, 2050 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1870 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 406 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:13:55,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 1870 Invalid, 1824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1237 Invalid, 0 Unknown, 406 Unchecked, 0.6s Time] [2022-03-15 16:13:55,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15239 states. [2022-03-15 16:13:55,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15239 to 10203. [2022-03-15 16:13:55,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10203 states, 10202 states have (on average 2.2691629092334837) internal successors, (23150), 10202 states have internal predecessors, (23150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:55,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10203 states to 10203 states and 23150 transitions. [2022-03-15 16:13:55,950 INFO L78 Accepts]: Start accepts. Automaton has 10203 states and 23150 transitions. Word has length 36 [2022-03-15 16:13:55,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:13:55,951 INFO L470 AbstractCegarLoop]: Abstraction has 10203 states and 23150 transitions. [2022-03-15 16:13:55,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:13:55,951 INFO L276 IsEmpty]: Start isEmpty. Operand 10203 states and 23150 transitions. [2022-03-15 16:13:55,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:13:55,959 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:13:55,959 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:13:55,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-15 16:13:56,168 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,SelfDestructingSolverStorable97 [2022-03-15 16:13:56,168 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:13:56,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:13:56,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1690502612, now seen corresponding path program 93 times [2022-03-15 16:13:56,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:13:56,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100614052] [2022-03-15 16:13:56,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:13:56,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:13:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:13:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:56,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:13:56,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100614052] [2022-03-15 16:13:56,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100614052] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:13:56,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906892499] [2022-03-15 16:13:56,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:13:56,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:13:56,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:13:56,431 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:13:56,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-15 16:13:56,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:13:56,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:13:56,455 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:13:56,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:13:57,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:57,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:57,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:13:57,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:57,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:57,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 33 [2022-03-15 16:13:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:13:57,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:13:59,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:13:59,445 INFO L353 Elim1Store]: treesize reduction 72, result has 67.1 percent of original size [2022-03-15 16:13:59,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 24 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 88 treesize of output 186 [2022-03-15 16:14:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:00,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906892499] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:00,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:00,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-03-15 16:14:00,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513570758] [2022-03-15 16:14:00,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:00,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:14:00,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:00,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:14:00,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1798, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:14:00,090 INFO L87 Difference]: Start difference. First operand 10203 states and 23150 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:04,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:04,250 INFO L93 Difference]: Finished difference Result 11590 states and 26137 transitions. [2022-03-15 16:14:04,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 16:14:04,251 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:14:04,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:04,270 INFO L225 Difference]: With dead ends: 11590 [2022-03-15 16:14:04,270 INFO L226 Difference]: Without dead ends: 11543 [2022-03-15 16:14:04,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1893 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1049, Invalid=6433, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 16:14:04,271 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 338 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 659 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:04,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 1224 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 363 Invalid, 0 Unknown, 659 Unchecked, 0.2s Time] [2022-03-15 16:14:04,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11543 states. [2022-03-15 16:14:04,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11543 to 10395. [2022-03-15 16:14:04,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10395 states, 10394 states have (on average 2.270444487204156) internal successors, (23599), 10394 states have internal predecessors, (23599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:04,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10395 states to 10395 states and 23599 transitions. [2022-03-15 16:14:04,422 INFO L78 Accepts]: Start accepts. Automaton has 10395 states and 23599 transitions. Word has length 36 [2022-03-15 16:14:04,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:04,422 INFO L470 AbstractCegarLoop]: Abstraction has 10395 states and 23599 transitions. [2022-03-15 16:14:04,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:04,422 INFO L276 IsEmpty]: Start isEmpty. Operand 10395 states and 23599 transitions. [2022-03-15 16:14:04,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:14:04,430 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:04,430 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:04,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-15 16:14:04,646 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,SelfDestructingSolverStorable98 [2022-03-15 16:14:04,646 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:14:04,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:04,646 INFO L85 PathProgramCache]: Analyzing trace with hash -583311554, now seen corresponding path program 94 times [2022-03-15 16:14:04,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:04,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564227820] [2022-03-15 16:14:04,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:04,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:04,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:04,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564227820] [2022-03-15 16:14:04,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564227820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:04,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457453865] [2022-03-15 16:14:04,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:14:04,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:04,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:04,901 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:04,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-15 16:14:04,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:14:04,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:04,922 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:14:04,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:05,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:05,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:05,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:05,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:05,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:05,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:05,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:05,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:05,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:05,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:05,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:05,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:05,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:05,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:05,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:05,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:05,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:05,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:05,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:05,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:05,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:05,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:05,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:05,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:14:05,601 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:05,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:06,405 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:14:06,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:14:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:06,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457453865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:06,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:06,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-15 16:14:06,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310266105] [2022-03-15 16:14:06,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:06,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:14:06,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:06,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:14:06,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1812, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:14:06,952 INFO L87 Difference]: Start difference. First operand 10395 states and 23599 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:10,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:10,241 INFO L93 Difference]: Finished difference Result 15188 states and 34114 transitions. [2022-03-15 16:14:10,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-15 16:14:10,242 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:14:10,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:10,264 INFO L225 Difference]: With dead ends: 15188 [2022-03-15 16:14:10,264 INFO L226 Difference]: Without dead ends: 15129 [2022-03-15 16:14:10,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4729 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1445, Invalid=12835, Unknown=0, NotChecked=0, Total=14280 [2022-03-15 16:14:10,265 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 446 mSDsluCounter, 2583 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 2555 SdHoareTripleChecker+Invalid, 2088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 405 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:10,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 2555 Invalid, 2088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1549 Invalid, 0 Unknown, 405 Unchecked, 0.8s Time] [2022-03-15 16:14:10,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15129 states. [2022-03-15 16:14:10,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15129 to 10695. [2022-03-15 16:14:10,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10695 states, 10694 states have (on average 2.2713671217505143) internal successors, (24290), 10694 states have internal predecessors, (24290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:10,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10695 states to 10695 states and 24290 transitions. [2022-03-15 16:14:10,432 INFO L78 Accepts]: Start accepts. Automaton has 10695 states and 24290 transitions. Word has length 36 [2022-03-15 16:14:10,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:10,432 INFO L470 AbstractCegarLoop]: Abstraction has 10695 states and 24290 transitions. [2022-03-15 16:14:10,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:10,432 INFO L276 IsEmpty]: Start isEmpty. Operand 10695 states and 24290 transitions. [2022-03-15 16:14:10,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:14:10,440 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:10,441 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:10,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-15 16:14:10,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-15 16:14:10,641 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:14:10,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:10,641 INFO L85 PathProgramCache]: Analyzing trace with hash 746797890, now seen corresponding path program 95 times [2022-03-15 16:14:10,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:10,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948310825] [2022-03-15 16:14:10,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:10,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:14:10,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:10,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948310825] [2022-03-15 16:14:10,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948310825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:10,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966948245] [2022-03-15 16:14:10,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:14:10,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:10,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:10,921 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:10,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-15 16:14:10,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:14:10,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:10,944 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-15 16:14:10,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:11,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:11,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:11,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:11,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:11,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:11,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:11,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:11,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:11,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:11,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:11,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:11,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:11,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:11,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:11,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:11,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:11,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:11,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:11,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:11,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:11,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:14:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:11,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:12,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:12,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:12,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 208 [2022-03-15 16:14:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:12,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966948245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:12,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:12,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 45 [2022-03-15 16:14:12,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913481544] [2022-03-15 16:14:12,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:12,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:14:12,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:12,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:14:12,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1767, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:14:12,706 INFO L87 Difference]: Start difference. First operand 10695 states and 24290 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:16,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:16,473 INFO L93 Difference]: Finished difference Result 17381 states and 39007 transitions. [2022-03-15 16:14:16,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-15 16:14:16,474 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:14:16,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:16,497 INFO L225 Difference]: With dead ends: 17381 [2022-03-15 16:14:16,498 INFO L226 Difference]: Without dead ends: 16933 [2022-03-15 16:14:16,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4420 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1428, Invalid=11682, Unknown=0, NotChecked=0, Total=13110 [2022-03-15 16:14:16,498 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 788 mSDsluCounter, 2814 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 2266 SdHoareTripleChecker+Invalid, 2240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:16,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [788 Valid, 2266 Invalid, 2240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1886 Invalid, 0 Unknown, 124 Unchecked, 1.0s Time] [2022-03-15 16:14:16,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16933 states. [2022-03-15 16:14:16,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16933 to 11723. [2022-03-15 16:14:16,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11723 states, 11722 states have (on average 2.278962634362737) internal successors, (26714), 11722 states have internal predecessors, (26714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:16,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11723 states to 11723 states and 26714 transitions. [2022-03-15 16:14:16,685 INFO L78 Accepts]: Start accepts. Automaton has 11723 states and 26714 transitions. Word has length 36 [2022-03-15 16:14:16,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:16,685 INFO L470 AbstractCegarLoop]: Abstraction has 11723 states and 26714 transitions. [2022-03-15 16:14:16,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:16,685 INFO L276 IsEmpty]: Start isEmpty. Operand 11723 states and 26714 transitions. [2022-03-15 16:14:16,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:14:16,694 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:16,694 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:16,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-15 16:14:16,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:16,896 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:14:16,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:16,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1579457052, now seen corresponding path program 96 times [2022-03-15 16:14:16,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:16,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599679544] [2022-03-15 16:14:16,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:16,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:17,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:17,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599679544] [2022-03-15 16:14:17,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599679544] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:17,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146365044] [2022-03-15 16:14:17,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:14:17,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:17,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:17,192 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:17,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-15 16:14:17,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:14:17,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:17,215 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-15 16:14:17,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:17,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:17,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:17,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:17,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:17,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:17,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:17,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:17,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:17,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:17,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:17,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:17,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:17,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:17,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:17,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:17,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:17,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:17,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:17,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:17,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:17,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:17,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 33 [2022-03-15 16:14:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:17,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:18,763 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:14:18,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:14:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:19,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146365044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:19,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:19,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:14:19,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413746531] [2022-03-15 16:14:19,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:19,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:14:19,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:19,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:14:19,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1884, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:14:19,336 INFO L87 Difference]: Start difference. First operand 11723 states and 26714 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:24,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:24,529 INFO L93 Difference]: Finished difference Result 22126 states and 49847 transitions. [2022-03-15 16:14:24,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-15 16:14:24,530 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:14:24,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:24,567 INFO L225 Difference]: With dead ends: 22126 [2022-03-15 16:14:24,567 INFO L226 Difference]: Without dead ends: 21894 [2022-03-15 16:14:24,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8627 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2451, Invalid=22355, Unknown=0, NotChecked=0, Total=24806 [2022-03-15 16:14:24,569 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 619 mSDsluCounter, 2659 mSDsCounter, 0 mSdLazyCounter, 1846 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 2396 SdHoareTripleChecker+Invalid, 2441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 364 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:24,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 2396 Invalid, 2441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1846 Invalid, 0 Unknown, 364 Unchecked, 0.9s Time] [2022-03-15 16:14:24,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21894 states. [2022-03-15 16:14:24,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21894 to 12244. [2022-03-15 16:14:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12244 states, 12243 states have (on average 2.272318876092461) internal successors, (27820), 12243 states have internal predecessors, (27820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:24,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12244 states to 12244 states and 27820 transitions. [2022-03-15 16:14:24,828 INFO L78 Accepts]: Start accepts. Automaton has 12244 states and 27820 transitions. Word has length 36 [2022-03-15 16:14:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:24,828 INFO L470 AbstractCegarLoop]: Abstraction has 12244 states and 27820 transitions. [2022-03-15 16:14:24,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:24,829 INFO L276 IsEmpty]: Start isEmpty. Operand 12244 states and 27820 transitions. [2022-03-15 16:14:24,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:14:24,838 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:24,838 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:24,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-15 16:14:25,038 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,SelfDestructingSolverStorable101 [2022-03-15 16:14:25,038 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:14:25,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:25,039 INFO L85 PathProgramCache]: Analyzing trace with hash -694357114, now seen corresponding path program 97 times [2022-03-15 16:14:25,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:25,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799567512] [2022-03-15 16:14:25,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:25,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:25,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:25,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799567512] [2022-03-15 16:14:25,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799567512] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:25,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706504874] [2022-03-15 16:14:25,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:14:25,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:25,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:25,313 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:25,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-15 16:14:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:25,334 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:14:25,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:26,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:26,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:26,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:26,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:26,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:26,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:26,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:26,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:26,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:26,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:26,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:26,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:26,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:26,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:26,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:26,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:26,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:26,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:26,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:26,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:26,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:14:26,037 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:26,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:26,865 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:14:26,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:14:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:27,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706504874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:27,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:27,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:14:27,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136087260] [2022-03-15 16:14:27,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:27,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:14:27,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:27,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:14:27,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1890, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:14:27,535 INFO L87 Difference]: Start difference. First operand 12244 states and 27820 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:31,473 INFO L93 Difference]: Finished difference Result 17924 states and 40385 transitions. [2022-03-15 16:14:31,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-15 16:14:31,474 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:14:31,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:31,500 INFO L225 Difference]: With dead ends: 17924 [2022-03-15 16:14:31,501 INFO L226 Difference]: Without dead ends: 17842 [2022-03-15 16:14:31,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6293 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1927, Invalid=17255, Unknown=0, NotChecked=0, Total=19182 [2022-03-15 16:14:31,502 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 434 mSDsluCounter, 2469 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 2398 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 497 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:31,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 2398 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1455 Invalid, 0 Unknown, 497 Unchecked, 0.7s Time] [2022-03-15 16:14:31,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17842 states. [2022-03-15 16:14:31,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17842 to 12316. [2022-03-15 16:14:31,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12316 states, 12315 states have (on average 2.2722695899309784) internal successors, (27983), 12315 states have internal predecessors, (27983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:31,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12316 states to 12316 states and 27983 transitions. [2022-03-15 16:14:31,709 INFO L78 Accepts]: Start accepts. Automaton has 12316 states and 27983 transitions. Word has length 36 [2022-03-15 16:14:31,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:31,709 INFO L470 AbstractCegarLoop]: Abstraction has 12316 states and 27983 transitions. [2022-03-15 16:14:31,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:31,709 INFO L276 IsEmpty]: Start isEmpty. Operand 12316 states and 27983 transitions. [2022-03-15 16:14:31,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:14:31,718 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:31,718 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:31,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-15 16:14:31,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:31,919 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:14:31,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:31,919 INFO L85 PathProgramCache]: Analyzing trace with hash 2048978942, now seen corresponding path program 98 times [2022-03-15 16:14:31,919 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:31,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78500] [2022-03-15 16:14:31,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:31,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:32,235 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:32,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78500] [2022-03-15 16:14:32,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:32,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190569199] [2022-03-15 16:14:32,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:14:32,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:32,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:32,237 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:32,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-15 16:14:32,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:14:32,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:32,258 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:14:32,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:32,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:32,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:32,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:32,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:32,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:32,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:32,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:32,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:32,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:32,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:32,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:32,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:32,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:32,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:32,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:32,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:32,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:32,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:32,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:32,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:32,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:32,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:32,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:32,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:14:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:32,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:33,774 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:14:33,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:14:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:34,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190569199] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:34,263 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:34,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:14:34,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753765455] [2022-03-15 16:14:34,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:34,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:14:34,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:34,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:14:34,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1887, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:14:34,264 INFO L87 Difference]: Start difference. First operand 12316 states and 27983 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:36,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:36,483 INFO L93 Difference]: Finished difference Result 16092 states and 36327 transitions. [2022-03-15 16:14:36,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-15 16:14:36,484 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:14:36,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:36,508 INFO L225 Difference]: With dead ends: 16092 [2022-03-15 16:14:36,508 INFO L226 Difference]: Without dead ends: 16054 [2022-03-15 16:14:36,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2724 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=940, Invalid=8180, Unknown=0, NotChecked=0, Total=9120 [2022-03-15 16:14:36,509 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 435 mSDsluCounter, 2237 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 2144 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 533 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:36,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 2144 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1356 Invalid, 0 Unknown, 533 Unchecked, 0.6s Time] [2022-03-15 16:14:36,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16054 states. [2022-03-15 16:14:36,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16054 to 12364. [2022-03-15 16:14:36,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12364 states, 12363 states have (on average 2.2724257866213704) internal successors, (28094), 12363 states have internal predecessors, (28094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12364 states to 12364 states and 28094 transitions. [2022-03-15 16:14:36,701 INFO L78 Accepts]: Start accepts. Automaton has 12364 states and 28094 transitions. Word has length 36 [2022-03-15 16:14:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:36,701 INFO L470 AbstractCegarLoop]: Abstraction has 12364 states and 28094 transitions. [2022-03-15 16:14:36,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:36,701 INFO L276 IsEmpty]: Start isEmpty. Operand 12364 states and 28094 transitions. [2022-03-15 16:14:36,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:14:36,710 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:36,710 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:36,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-15 16:14:36,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-15 16:14:36,910 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:14:36,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:36,911 INFO L85 PathProgramCache]: Analyzing trace with hash -162781096, now seen corresponding path program 99 times [2022-03-15 16:14:36,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:36,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041294286] [2022-03-15 16:14:36,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:36,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:14:37,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:37,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041294286] [2022-03-15 16:14:37,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041294286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:37,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189009779] [2022-03-15 16:14:37,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:14:37,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:37,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:37,219 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:37,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-15 16:14:37,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:14:37,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:37,243 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-15 16:14:37,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:37,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:37,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:37,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:37,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:37,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:37,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:37,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:37,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:37,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:37,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:37,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:37,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:37,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:37,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:37,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:37,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:37,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:37,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:37,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:37,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:37,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:37,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2022-03-15 16:14:37,927 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:37,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:38,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:38,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:14:38,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 208 [2022-03-15 16:14:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:38,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189009779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:38,964 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:38,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 45 [2022-03-15 16:14:38,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828956791] [2022-03-15 16:14:38,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:38,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:14:38,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:38,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:14:38,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1642, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:14:38,965 INFO L87 Difference]: Start difference. First operand 12364 states and 28094 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:42,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:42,363 INFO L93 Difference]: Finished difference Result 18270 states and 41014 transitions. [2022-03-15 16:14:42,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-15 16:14:42,363 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:14:42,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:42,390 INFO L225 Difference]: With dead ends: 18270 [2022-03-15 16:14:42,390 INFO L226 Difference]: Without dead ends: 17904 [2022-03-15 16:14:42,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2784 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1301, Invalid=7071, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 16:14:42,391 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 765 mSDsluCounter, 2363 mSDsCounter, 0 mSdLazyCounter, 1595 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 1868 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:42,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 1868 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1595 Invalid, 0 Unknown, 97 Unchecked, 0.9s Time] [2022-03-15 16:14:42,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17904 states. [2022-03-15 16:14:42,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17904 to 13255. [2022-03-15 16:14:42,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13255 states, 13254 states have (on average 2.273049645390071) internal successors, (30127), 13254 states have internal predecessors, (30127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:42,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13255 states to 13255 states and 30127 transitions. [2022-03-15 16:14:42,606 INFO L78 Accepts]: Start accepts. Automaton has 13255 states and 30127 transitions. Word has length 36 [2022-03-15 16:14:42,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:42,606 INFO L470 AbstractCegarLoop]: Abstraction has 13255 states and 30127 transitions. [2022-03-15 16:14:42,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:42,606 INFO L276 IsEmpty]: Start isEmpty. Operand 13255 states and 30127 transitions. [2022-03-15 16:14:42,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:14:42,615 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:42,616 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:42,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-15 16:14:42,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:42,816 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:14:42,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:42,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1636753200, now seen corresponding path program 100 times [2022-03-15 16:14:42,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:42,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787711606] [2022-03-15 16:14:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:42,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:43,106 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:43,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:43,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787711606] [2022-03-15 16:14:43,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787711606] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:43,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430197965] [2022-03-15 16:14:43,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:14:43,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:43,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:43,108 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:43,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-15 16:14:43,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:14:43,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:43,155 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:14:43,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:43,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:43,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:43,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:43,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:43,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:43,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:43,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:43,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:43,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:43,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:43,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:43,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:43,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:43,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:43,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:43,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:43,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:43,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:43,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:43,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:43,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:43,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:43,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:14:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:43,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:44,647 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:14:44,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:14:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:45,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430197965] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:45,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:45,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-15 16:14:45,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730438581] [2022-03-15 16:14:45,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:45,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:14:45,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:45,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:14:45,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1788, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:14:45,297 INFO L87 Difference]: Start difference. First operand 13255 states and 30127 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:48,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:48,502 INFO L93 Difference]: Finished difference Result 21637 states and 48761 transitions. [2022-03-15 16:14:48,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-15 16:14:48,503 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:14:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:48,537 INFO L225 Difference]: With dead ends: 21637 [2022-03-15 16:14:48,537 INFO L226 Difference]: Without dead ends: 21559 [2022-03-15 16:14:48,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4145 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1330, Invalid=11552, Unknown=0, NotChecked=0, Total=12882 [2022-03-15 16:14:48,538 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 573 mSDsluCounter, 2052 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 1976 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:48,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 1976 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1622 Invalid, 0 Unknown, 74 Unchecked, 0.8s Time] [2022-03-15 16:14:48,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21559 states. [2022-03-15 16:14:48,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21559 to 13243. [2022-03-15 16:14:48,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13243 states, 13242 states have (on average 2.2726929466847907) internal successors, (30095), 13242 states have internal predecessors, (30095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:48,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13243 states to 13243 states and 30095 transitions. [2022-03-15 16:14:48,847 INFO L78 Accepts]: Start accepts. Automaton has 13243 states and 30095 transitions. Word has length 36 [2022-03-15 16:14:48,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:48,847 INFO L470 AbstractCegarLoop]: Abstraction has 13243 states and 30095 transitions. [2022-03-15 16:14:48,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:48,847 INFO L276 IsEmpty]: Start isEmpty. Operand 13243 states and 30095 transitions. [2022-03-15 16:14:48,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:14:48,855 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:48,855 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:48,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-15 16:14:49,055 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,SelfDestructingSolverStorable105 [2022-03-15 16:14:49,056 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:14:49,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:49,056 INFO L85 PathProgramCache]: Analyzing trace with hash 669878066, now seen corresponding path program 101 times [2022-03-15 16:14:49,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:49,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009513652] [2022-03-15 16:14:49,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:49,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:49,355 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:49,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009513652] [2022-03-15 16:14:49,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009513652] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:49,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693896744] [2022-03-15 16:14:49,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:14:49,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:49,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:49,356 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:49,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-15 16:14:49,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:14:49,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:49,378 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:14:49,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:50,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:50,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:50,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:50,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:50,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:50,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:50,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:50,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:50,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:50,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:50,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:50,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:50,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:50,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:50,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:50,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:50,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:50,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:50,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:50,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:50,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:50,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:14:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:50,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:50,904 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:14:50,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:14:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:51,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693896744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:51,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:51,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:14:51,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880770312] [2022-03-15 16:14:51,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:51,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:14:51,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:51,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:14:51,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1883, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:14:51,461 INFO L87 Difference]: Start difference. First operand 13243 states and 30095 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:56,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:14:56,438 INFO L93 Difference]: Finished difference Result 20192 states and 45300 transitions. [2022-03-15 16:14:56,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-03-15 16:14:56,438 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:14:56,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:14:56,468 INFO L225 Difference]: With dead ends: 20192 [2022-03-15 16:14:56,469 INFO L226 Difference]: Without dead ends: 20107 [2022-03-15 16:14:56,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8042 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2373, Invalid=21189, Unknown=0, NotChecked=0, Total=23562 [2022-03-15 16:14:56,470 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 531 mSDsluCounter, 3553 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 3416 SdHoareTripleChecker+Invalid, 3195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 553 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:14:56,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 3416 Invalid, 3195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 2437 Invalid, 0 Unknown, 553 Unchecked, 1.1s Time] [2022-03-15 16:14:56,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20107 states. [2022-03-15 16:14:56,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20107 to 13570. [2022-03-15 16:14:56,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13570 states, 13569 states have (on average 2.272754071781266) internal successors, (30839), 13569 states have internal predecessors, (30839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:56,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13570 states to 13570 states and 30839 transitions. [2022-03-15 16:14:56,718 INFO L78 Accepts]: Start accepts. Automaton has 13570 states and 30839 transitions. Word has length 36 [2022-03-15 16:14:56,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:14:56,718 INFO L470 AbstractCegarLoop]: Abstraction has 13570 states and 30839 transitions. [2022-03-15 16:14:56,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:14:56,718 INFO L276 IsEmpty]: Start isEmpty. Operand 13570 states and 30839 transitions. [2022-03-15 16:14:56,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:14:56,728 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:14:56,728 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:14:56,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-15 16:14:56,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:56,928 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:14:56,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:14:56,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1603936100, now seen corresponding path program 102 times [2022-03-15 16:14:56,929 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:14:56,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493105635] [2022-03-15 16:14:56,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:14:56,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:14:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:14:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:57,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:14:57,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493105635] [2022-03-15 16:14:57,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493105635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:14:57,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704525638] [2022-03-15 16:14:57,217 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:14:57,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:14:57,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:14:57,218 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:14:57,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-15 16:14:57,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:14:57,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:14:57,240 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:14:57,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:14:57,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:57,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:57,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:57,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:57,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:57,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:57,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:57,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:57,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:57,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:57,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:57,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:57,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:57,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:57,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:57,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:57,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:57,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:57,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:57,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:14:57,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:14:57,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:14:57,944 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:57,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:14:58,770 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:14:58,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:14:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:14:59,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704525638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:14:59,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:14:59,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:14:59,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375345083] [2022-03-15 16:14:59,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:14:59,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:14:59,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:14:59,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:14:59,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1885, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:14:59,296 INFO L87 Difference]: Start difference. First operand 13570 states and 30839 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:03,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:03,383 INFO L93 Difference]: Finished difference Result 18706 states and 42142 transitions. [2022-03-15 16:15:03,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-03-15 16:15:03,383 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:15:03,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:03,412 INFO L225 Difference]: With dead ends: 18706 [2022-03-15 16:15:03,412 INFO L226 Difference]: Without dead ends: 18639 [2022-03-15 16:15:03,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6301 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1874, Invalid=17308, Unknown=0, NotChecked=0, Total=19182 [2022-03-15 16:15:03,413 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 599 mSDsluCounter, 3089 mSDsCounter, 0 mSdLazyCounter, 2221 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 3028 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 390 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:03,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 3028 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2221 Invalid, 0 Unknown, 390 Unchecked, 1.0s Time] [2022-03-15 16:15:03,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18639 states. [2022-03-15 16:15:03,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18639 to 13543. [2022-03-15 16:15:03,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13543 states, 13542 states have (on average 2.2724117560183132) internal successors, (30773), 13542 states have internal predecessors, (30773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:03,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13543 states to 13543 states and 30773 transitions. [2022-03-15 16:15:03,642 INFO L78 Accepts]: Start accepts. Automaton has 13543 states and 30773 transitions. Word has length 36 [2022-03-15 16:15:03,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:03,642 INFO L470 AbstractCegarLoop]: Abstraction has 13543 states and 30773 transitions. [2022-03-15 16:15:03,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:03,642 INFO L276 IsEmpty]: Start isEmpty. Operand 13543 states and 30773 transitions. [2022-03-15 16:15:03,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:15:03,652 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:03,652 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:03,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-03-15 16:15:03,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:03,853 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:15:03,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:03,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1139399956, now seen corresponding path program 103 times [2022-03-15 16:15:03,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:03,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237870914] [2022-03-15 16:15:03,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:03,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:04,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:04,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237870914] [2022-03-15 16:15:04,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237870914] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:04,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812150626] [2022-03-15 16:15:04,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:15:04,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:04,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:04,166 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:04,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-15 16:15:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:04,187 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:15:04,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:04,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:04,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:04,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:04,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:04,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:04,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:04,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:04,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:04,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:04,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:04,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:04,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:04,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:04,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:04,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:04,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:04,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:04,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:04,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:04,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:04,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:04,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:04,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:04,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:15:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:04,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:05,682 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:15:05,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:15:06,333 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:06,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812150626] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:06,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:06,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:15:06,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457515918] [2022-03-15 16:15:06,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:06,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:15:06,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:06,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:15:06,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1887, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:15:06,334 INFO L87 Difference]: Start difference. First operand 13543 states and 30773 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:09,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:09,559 INFO L93 Difference]: Finished difference Result 17589 states and 39657 transitions. [2022-03-15 16:15:09,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-15 16:15:09,559 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:15:09,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:09,586 INFO L225 Difference]: With dead ends: 17589 [2022-03-15 16:15:09,586 INFO L226 Difference]: Without dead ends: 17551 [2022-03-15 16:15:09,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4847 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1537, Invalid=13469, Unknown=0, NotChecked=0, Total=15006 [2022-03-15 16:15:09,587 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 490 mSDsluCounter, 2367 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 2382 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:09,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 2382 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1667 Invalid, 0 Unknown, 276 Unchecked, 0.8s Time] [2022-03-15 16:15:09,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17551 states. [2022-03-15 16:15:09,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17551 to 13681. [2022-03-15 16:15:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13681 states, 13680 states have (on average 2.272733918128655) internal successors, (31091), 13680 states have internal predecessors, (31091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:09,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13681 states to 13681 states and 31091 transitions. [2022-03-15 16:15:09,823 INFO L78 Accepts]: Start accepts. Automaton has 13681 states and 31091 transitions. Word has length 36 [2022-03-15 16:15:09,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:09,823 INFO L470 AbstractCegarLoop]: Abstraction has 13681 states and 31091 transitions. [2022-03-15 16:15:09,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:09,823 INFO L276 IsEmpty]: Start isEmpty. Operand 13681 states and 31091 transitions. [2022-03-15 16:15:09,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:15:09,832 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:09,833 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:09,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-15 16:15:10,033 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,SelfDestructingSolverStorable108 [2022-03-15 16:15:10,033 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:15:10,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:10,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2142340094, now seen corresponding path program 104 times [2022-03-15 16:15:10,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:10,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020606046] [2022-03-15 16:15:10,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:10,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:10,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:10,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:10,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020606046] [2022-03-15 16:15:10,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020606046] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:10,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973588106] [2022-03-15 16:15:10,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:15:10,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:10,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:10,329 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:10,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-15 16:15:10,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:15:10,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:10,352 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:15:10,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:11,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:11,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:11,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:11,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:11,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:11,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:11,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:11,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:11,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:11,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:11,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:11,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:11,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:11,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:11,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:11,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:11,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:11,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:11,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:11,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:11,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:15:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:11,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:11,875 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:15:11,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:15:12,325 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:12,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973588106] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:12,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:12,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:15:12,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686607577] [2022-03-15 16:15:12,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:12,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:15:12,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:12,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:15:12,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1890, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:15:12,326 INFO L87 Difference]: Start difference. First operand 13681 states and 31091 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:14,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:14,431 INFO L93 Difference]: Finished difference Result 15975 states and 36110 transitions. [2022-03-15 16:15:14,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-15 16:15:14,432 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:15:14,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:14,455 INFO L225 Difference]: With dead ends: 15975 [2022-03-15 16:15:14,455 INFO L226 Difference]: Without dead ends: 15936 [2022-03-15 16:15:14,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2809 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=949, Invalid=8557, Unknown=0, NotChecked=0, Total=9506 [2022-03-15 16:15:14,457 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 321 mSDsluCounter, 2246 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 2198 SdHoareTripleChecker+Invalid, 2051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 655 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:14,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 2198 Invalid, 2051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1320 Invalid, 0 Unknown, 655 Unchecked, 0.6s Time] [2022-03-15 16:15:14,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15936 states. [2022-03-15 16:15:14,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15936 to 14041. [2022-03-15 16:15:14,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14041 states, 14040 states have (on average 2.273789173789174) internal successors, (31924), 14040 states have internal predecessors, (31924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:14,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14041 states to 14041 states and 31924 transitions. [2022-03-15 16:15:14,703 INFO L78 Accepts]: Start accepts. Automaton has 14041 states and 31924 transitions. Word has length 36 [2022-03-15 16:15:14,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:14,703 INFO L470 AbstractCegarLoop]: Abstraction has 14041 states and 31924 transitions. [2022-03-15 16:15:14,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:14,703 INFO L276 IsEmpty]: Start isEmpty. Operand 14041 states and 31924 transitions. [2022-03-15 16:15:14,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:15:14,713 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:14,713 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:14,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-15 16:15:14,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:14,913 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:15:14,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:14,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1444944292, now seen corresponding path program 105 times [2022-03-15 16:15:14,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:14,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639782486] [2022-03-15 16:15:14,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:14,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:15:15,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:15,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639782486] [2022-03-15 16:15:15,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639782486] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:15,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103517195] [2022-03-15 16:15:15,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:15:15,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:15,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:15,154 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:15,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-15 16:15:15,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 16:15:15,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:15,176 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:15:15,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:15,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:15,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:15,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:15,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:15,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:15,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:15,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:15,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:15,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:15,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:15,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:15,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:15,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:15,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:15,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:15,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:15,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:15,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:15,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:15,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:15,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:15,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:15,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:15,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:15:15,896 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:15,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:16,766 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:15:16,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:15:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:17,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103517195] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:17,272 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:17,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-03-15 16:15:17,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782607881] [2022-03-15 16:15:17,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:17,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:15:17,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:17,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:15:17,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1915, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:15:17,273 INFO L87 Difference]: Start difference. First operand 14041 states and 31924 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:20,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:20,989 INFO L93 Difference]: Finished difference Result 25767 states and 58197 transitions. [2022-03-15 16:15:20,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-15 16:15:20,989 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:15:20,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:21,037 INFO L225 Difference]: With dead ends: 25767 [2022-03-15 16:15:21,037 INFO L226 Difference]: Without dead ends: 25702 [2022-03-15 16:15:21,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5310 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1381, Invalid=14875, Unknown=0, NotChecked=0, Total=16256 [2022-03-15 16:15:21,038 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 584 mSDsluCounter, 3031 mSDsCounter, 0 mSdLazyCounter, 1890 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 2921 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 540 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:21,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 2921 Invalid, 2588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1890 Invalid, 0 Unknown, 540 Unchecked, 0.9s Time] [2022-03-15 16:15:21,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25702 states. [2022-03-15 16:15:21,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25702 to 15113. [2022-03-15 16:15:21,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15113 states, 15112 states have (on average 2.2700502911593436) internal successors, (34305), 15112 states have internal predecessors, (34305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:21,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15113 states to 15113 states and 34305 transitions. [2022-03-15 16:15:21,345 INFO L78 Accepts]: Start accepts. Automaton has 15113 states and 34305 transitions. Word has length 36 [2022-03-15 16:15:21,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:21,345 INFO L470 AbstractCegarLoop]: Abstraction has 15113 states and 34305 transitions. [2022-03-15 16:15:21,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:21,345 INFO L276 IsEmpty]: Start isEmpty. Operand 15113 states and 34305 transitions. [2022-03-15 16:15:21,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:15:21,355 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:21,355 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:21,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-15 16:15:21,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:21,556 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:15:21,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:21,556 INFO L85 PathProgramCache]: Analyzing trace with hash 2040716316, now seen corresponding path program 106 times [2022-03-15 16:15:21,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:21,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716428909] [2022-03-15 16:15:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:21,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:21,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:21,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716428909] [2022-03-15 16:15:21,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716428909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:21,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640568155] [2022-03-15 16:15:21,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:15:21,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:21,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:21,809 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:21,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-15 16:15:21,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:15:21,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:21,830 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:15:21,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:22,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:22,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:22,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:22,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:22,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:22,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:22,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:22,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:22,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:22,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:22,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:22,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:22,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:22,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:22,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:22,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:22,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:22,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:22,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:22,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:22,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:15:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:22,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:23,414 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:15:23,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:15:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:23,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640568155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:23,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:23,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 47 [2022-03-15 16:15:23,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816647442] [2022-03-15 16:15:23,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:23,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:15:23,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:23,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:15:23,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2011, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:15:23,881 INFO L87 Difference]: Start difference. First operand 15113 states and 34305 transitions. Second operand has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:29,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:29,067 INFO L93 Difference]: Finished difference Result 27971 states and 63176 transitions. [2022-03-15 16:15:29,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-03-15 16:15:29,068 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:15:29,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:29,119 INFO L225 Difference]: With dead ends: 27971 [2022-03-15 16:15:29,119 INFO L226 Difference]: Without dead ends: 27905 [2022-03-15 16:15:29,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7274 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1855, Invalid=19315, Unknown=0, NotChecked=0, Total=21170 [2022-03-15 16:15:29,121 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 617 mSDsluCounter, 2415 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 2280 SdHoareTripleChecker+Invalid, 2167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:29,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 2280 Invalid, 2167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1748 Invalid, 0 Unknown, 220 Unchecked, 0.9s Time] [2022-03-15 16:15:29,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27905 states. [2022-03-15 16:15:29,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27905 to 15999. [2022-03-15 16:15:29,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15999 states, 15998 states have (on average 2.26678334791849) internal successors, (36264), 15998 states have internal predecessors, (36264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:29,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15999 states to 15999 states and 36264 transitions. [2022-03-15 16:15:29,465 INFO L78 Accepts]: Start accepts. Automaton has 15999 states and 36264 transitions. Word has length 36 [2022-03-15 16:15:29,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:29,465 INFO L470 AbstractCegarLoop]: Abstraction has 15999 states and 36264 transitions. [2022-03-15 16:15:29,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:29,465 INFO L276 IsEmpty]: Start isEmpty. Operand 15999 states and 36264 transitions. [2022-03-15 16:15:29,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:15:29,476 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:29,476 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:29,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-15 16:15:29,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:29,677 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:15:29,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:29,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1929670756, now seen corresponding path program 107 times [2022-03-15 16:15:29,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:29,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849298300] [2022-03-15 16:15:29,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:29,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:29,936 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:29,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849298300] [2022-03-15 16:15:29,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849298300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:29,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817947132] [2022-03-15 16:15:29,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:15:29,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:29,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:29,937 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:29,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-15 16:15:29,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 16:15:29,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:29,960 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-15 16:15:29,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:30,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:30,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:30,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:30,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:30,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:30,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2022-03-15 16:15:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:30,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:31,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:31,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:15:31,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 208 [2022-03-15 16:15:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:31,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817947132] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:31,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:31,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-03-15 16:15:31,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303943965] [2022-03-15 16:15:31,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:31,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-15 16:15:31,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:31,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-15 16:15:31,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1943, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:15:31,720 INFO L87 Difference]: Start difference. First operand 15999 states and 36264 transitions. Second operand has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:37,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:37,898 INFO L93 Difference]: Finished difference Result 26529 states and 59596 transitions. [2022-03-15 16:15:37,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-03-15 16:15:37,898 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:15:37,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:37,945 INFO L225 Difference]: With dead ends: 26529 [2022-03-15 16:15:37,945 INFO L226 Difference]: Without dead ends: 26354 [2022-03-15 16:15:37,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7465 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2164, Invalid=19298, Unknown=0, NotChecked=0, Total=21462 [2022-03-15 16:15:37,947 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 674 mSDsluCounter, 2857 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 2571 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:37,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [674 Valid, 2571 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1975 Invalid, 0 Unknown, 287 Unchecked, 1.1s Time] [2022-03-15 16:15:37,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26354 states. [2022-03-15 16:15:38,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26354 to 17022. [2022-03-15 16:15:38,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17022 states, 17021 states have (on average 2.2642030432994535) internal successors, (38539), 17021 states have internal predecessors, (38539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:38,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17022 states to 17022 states and 38539 transitions. [2022-03-15 16:15:38,266 INFO L78 Accepts]: Start accepts. Automaton has 17022 states and 38539 transitions. Word has length 36 [2022-03-15 16:15:38,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:38,266 INFO L470 AbstractCegarLoop]: Abstraction has 17022 states and 38539 transitions. [2022-03-15 16:15:38,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:38,266 INFO L276 IsEmpty]: Start isEmpty. Operand 17022 states and 38539 transitions. [2022-03-15 16:15:38,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:15:38,278 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:38,278 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:38,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-15 16:15:38,478 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,SelfDestructingSolverStorable112 [2022-03-15 16:15:38,478 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:15:38,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:38,478 INFO L85 PathProgramCache]: Analyzing trace with hash 378039516, now seen corresponding path program 108 times [2022-03-15 16:15:38,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:38,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428469920] [2022-03-15 16:15:38,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:38,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:38,751 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:38,751 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:38,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428469920] [2022-03-15 16:15:38,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428469920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:38,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956012097] [2022-03-15 16:15:38,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:15:38,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:38,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:38,752 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:38,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-15 16:15:38,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 16:15:38,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:38,775 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:15:38,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:39,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:39,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:39,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:39,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:39,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:39,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:39,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:39,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:39,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:39,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:39,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:39,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:39,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:39,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:39,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:39,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:39,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:39,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:39,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:39,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:39,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:15:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:39,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:40,386 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:15:40,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:15:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:40,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956012097] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:40,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:40,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 47 [2022-03-15 16:15:40,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069186372] [2022-03-15 16:15:40,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:40,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:15:40,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:40,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:15:40,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=2000, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:15:40,962 INFO L87 Difference]: Start difference. First operand 17022 states and 38539 transitions. Second operand has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:45,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:45,449 INFO L93 Difference]: Finished difference Result 27901 states and 62824 transitions. [2022-03-15 16:15:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-15 16:15:45,450 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:15:45,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:45,497 INFO L225 Difference]: With dead ends: 27901 [2022-03-15 16:15:45,497 INFO L226 Difference]: Without dead ends: 27826 [2022-03-15 16:15:45,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6136 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1717, Invalid=16643, Unknown=0, NotChecked=0, Total=18360 [2022-03-15 16:15:45,499 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 559 mSDsluCounter, 3581 mSDsCounter, 0 mSdLazyCounter, 2655 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 3480 SdHoareTripleChecker+Invalid, 3182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 2655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:45,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 3480 Invalid, 3182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 2655 Invalid, 0 Unknown, 381 Unchecked, 1.2s Time] [2022-03-15 16:15:45,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27826 states. [2022-03-15 16:15:45,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27826 to 16734. [2022-03-15 16:15:45,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16734 states, 16733 states have (on average 2.2642682125141933) internal successors, (37888), 16733 states have internal predecessors, (37888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16734 states to 16734 states and 37888 transitions. [2022-03-15 16:15:45,813 INFO L78 Accepts]: Start accepts. Automaton has 16734 states and 37888 transitions. Word has length 36 [2022-03-15 16:15:45,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:45,813 INFO L470 AbstractCegarLoop]: Abstraction has 16734 states and 37888 transitions. [2022-03-15 16:15:45,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:45,813 INFO L276 IsEmpty]: Start isEmpty. Operand 16734 states and 37888 transitions. [2022-03-15 16:15:45,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:15:45,824 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:45,824 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:45,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-15 16:15:46,024 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,SelfDestructingSolverStorable113 [2022-03-15 16:15:46,025 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:15:46,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:46,025 INFO L85 PathProgramCache]: Analyzing trace with hash 688401286, now seen corresponding path program 109 times [2022-03-15 16:15:46,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:46,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332670858] [2022-03-15 16:15:46,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:46,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:46,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:46,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332670858] [2022-03-15 16:15:46,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332670858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:46,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843700310] [2022-03-15 16:15:46,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:15:46,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:46,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:46,292 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:46,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-15 16:15:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:46,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:15:46,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:46,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:46,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:46,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:46,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:46,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:46,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:46,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:46,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:46,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:46,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:46,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:46,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:46,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:46,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:46,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:46,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:46,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:46,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:46,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:46,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:46,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:46,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:46,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:15:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:47,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:47,804 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:15:47,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:15:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:48,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843700310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:48,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:48,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-15 16:15:48,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857773485] [2022-03-15 16:15:48,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:48,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:15:48,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:48,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:15:48,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1818, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:15:48,409 INFO L87 Difference]: Start difference. First operand 16734 states and 37888 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:52,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:52,273 INFO L93 Difference]: Finished difference Result 25059 states and 56337 transitions. [2022-03-15 16:15:52,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-03-15 16:15:52,274 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:15:52,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:52,314 INFO L225 Difference]: With dead ends: 25059 [2022-03-15 16:15:52,314 INFO L226 Difference]: Without dead ends: 24965 [2022-03-15 16:15:52,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5286 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1661, Invalid=14595, Unknown=0, NotChecked=0, Total=16256 [2022-03-15 16:15:52,315 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 632 mSDsluCounter, 2697 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 2412 SdHoareTripleChecker+Invalid, 2455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 434 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:52,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 2412 Invalid, 2455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1830 Invalid, 0 Unknown, 434 Unchecked, 0.9s Time] [2022-03-15 16:15:52,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24965 states. [2022-03-15 16:15:52,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24965 to 17632. [2022-03-15 16:15:52,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17632 states, 17631 states have (on average 2.265441551812149) internal successors, (39942), 17631 states have internal predecessors, (39942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:52,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17632 states to 17632 states and 39942 transitions. [2022-03-15 16:15:52,616 INFO L78 Accepts]: Start accepts. Automaton has 17632 states and 39942 transitions. Word has length 36 [2022-03-15 16:15:52,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:52,616 INFO L470 AbstractCegarLoop]: Abstraction has 17632 states and 39942 transitions. [2022-03-15 16:15:52,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:52,616 INFO L276 IsEmpty]: Start isEmpty. Operand 17632 states and 39942 transitions. [2022-03-15 16:15:52,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:15:52,627 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:52,627 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:52,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-15 16:15:52,827 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,SelfDestructingSolverStorable114 [2022-03-15 16:15:52,827 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:15:52,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:52,827 INFO L85 PathProgramCache]: Analyzing trace with hash 577355726, now seen corresponding path program 110 times [2022-03-15 16:15:52,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:52,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401960663] [2022-03-15 16:15:52,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:52,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:15:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:53,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:15:53,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401960663] [2022-03-15 16:15:53,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401960663] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:15:53,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95925948] [2022-03-15 16:15:53,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:15:53,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:15:53,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:15:53,104 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:15:53,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-15 16:15:53,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:15:53,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:15:53,124 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:15:53,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:15:53,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:53,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:53,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:53,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:53,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:53,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:53,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:53,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:53,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:53,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:53,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:53,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:53,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:53,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:53,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:53,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:53,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:53,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:53,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:53,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:15:53,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:53,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:15:53,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:15:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:53,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:15:54,715 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:15:54,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:15:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:15:55,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95925948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:15:55,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:15:55,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:15:55,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725024667] [2022-03-15 16:15:55,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:15:55,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:15:55,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:15:55,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:15:55,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:15:55,318 INFO L87 Difference]: Start difference. First operand 17632 states and 39942 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:59,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:15:59,273 INFO L93 Difference]: Finished difference Result 24110 states and 54238 transitions. [2022-03-15 16:15:59,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-15 16:15:59,273 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:15:59,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:15:59,312 INFO L225 Difference]: With dead ends: 24110 [2022-03-15 16:15:59,312 INFO L226 Difference]: Without dead ends: 24015 [2022-03-15 16:15:59,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4829 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1560, Invalid=13692, Unknown=0, NotChecked=0, Total=15252 [2022-03-15 16:15:59,314 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 689 mSDsluCounter, 2666 mSDsCounter, 0 mSdLazyCounter, 1809 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 2421 SdHoareTripleChecker+Invalid, 2394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 360 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:15:59,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [689 Valid, 2421 Invalid, 2394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1809 Invalid, 0 Unknown, 360 Unchecked, 0.9s Time] [2022-03-15 16:15:59,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24015 states. [2022-03-15 16:15:59,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24015 to 17082. [2022-03-15 16:15:59,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17082 states, 17081 states have (on average 2.2650898659329077) internal successors, (38690), 17081 states have internal predecessors, (38690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17082 states to 17082 states and 38690 transitions. [2022-03-15 16:15:59,616 INFO L78 Accepts]: Start accepts. Automaton has 17082 states and 38690 transitions. Word has length 36 [2022-03-15 16:15:59,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:15:59,616 INFO L470 AbstractCegarLoop]: Abstraction has 17082 states and 38690 transitions. [2022-03-15 16:15:59,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:15:59,616 INFO L276 IsEmpty]: Start isEmpty. Operand 17082 states and 38690 transitions. [2022-03-15 16:15:59,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:15:59,626 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:15:59,626 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:15:59,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-15 16:15:59,827 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,SelfDestructingSolverStorable115 [2022-03-15 16:15:59,827 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:15:59,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:15:59,827 INFO L85 PathProgramCache]: Analyzing trace with hash -974275514, now seen corresponding path program 111 times [2022-03-15 16:15:59,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:15:59,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206066351] [2022-03-15 16:15:59,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:15:59,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:15:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:00,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:00,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206066351] [2022-03-15 16:16:00,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206066351] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:00,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053764156] [2022-03-15 16:16:00,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:16:00,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:00,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:00,163 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:00,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-15 16:16:00,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:16:00,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:00,186 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:16:00,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:00,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:00,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:00,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:00,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:00,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:00,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:00,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:00,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:00,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:00,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:00,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:00,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:00,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:00,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:00,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:00,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:00,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:00,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:00,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:00,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:00,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:00,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:00,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:16:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:00,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:01,719 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:16:01,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:16:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:02,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053764156] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:02,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:02,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:16:02,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217939983] [2022-03-15 16:16:02,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:02,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:16:02,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:02,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:16:02,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1890, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:16:02,294 INFO L87 Difference]: Start difference. First operand 17082 states and 38690 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:05,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:05,885 INFO L93 Difference]: Finished difference Result 23291 states and 52383 transitions. [2022-03-15 16:16:05,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-15 16:16:05,886 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:16:05,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:05,924 INFO L225 Difference]: With dead ends: 23291 [2022-03-15 16:16:05,924 INFO L226 Difference]: Without dead ends: 23247 [2022-03-15 16:16:05,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4848 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1642, Invalid=13610, Unknown=0, NotChecked=0, Total=15252 [2022-03-15 16:16:05,926 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 542 mSDsluCounter, 2604 mSDsCounter, 0 mSdLazyCounter, 1826 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 2484 SdHoareTripleChecker+Invalid, 2290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:05,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 2484 Invalid, 2290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1826 Invalid, 0 Unknown, 313 Unchecked, 0.9s Time] [2022-03-15 16:16:05,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23247 states. [2022-03-15 16:16:06,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23247 to 17009. [2022-03-15 16:16:06,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17009 states, 17008 states have (on average 2.264640169332079) internal successors, (38517), 17008 states have internal predecessors, (38517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:06,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17009 states to 17009 states and 38517 transitions. [2022-03-15 16:16:06,216 INFO L78 Accepts]: Start accepts. Automaton has 17009 states and 38517 transitions. Word has length 36 [2022-03-15 16:16:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:06,216 INFO L470 AbstractCegarLoop]: Abstraction has 17009 states and 38517 transitions. [2022-03-15 16:16:06,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:06,217 INFO L276 IsEmpty]: Start isEmpty. Operand 17009 states and 38517 transitions. [2022-03-15 16:16:06,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:16:06,227 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:06,227 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:16:06,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-15 16:16:06,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:06,428 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:16:06,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:06,428 INFO L85 PathProgramCache]: Analyzing trace with hash -332223260, now seen corresponding path program 112 times [2022-03-15 16:16:06,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:06,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113918774] [2022-03-15 16:16:06,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:06,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:06,722 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:06,722 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:06,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113918774] [2022-03-15 16:16:06,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113918774] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:06,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047051359] [2022-03-15 16:16:06,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:16:06,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:06,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:06,723 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:06,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-15 16:16:06,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:16:06,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:06,744 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:16:06,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:07,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:07,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:07,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:07,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:07,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:07,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:07,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:07,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:07,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:07,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:07,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:07,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:07,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:07,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:07,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:07,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:07,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:07,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:07,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:07,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:07,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:16:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:07,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:08,328 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:16:08,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:16:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:08,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047051359] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:08,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:08,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:16:08,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286883045] [2022-03-15 16:16:08,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:08,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:16:08,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:08,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:16:08,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1890, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:16:08,917 INFO L87 Difference]: Start difference. First operand 17009 states and 38517 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:12,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:12,969 INFO L93 Difference]: Finished difference Result 23298 states and 52310 transitions. [2022-03-15 16:16:12,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-15 16:16:12,970 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:16:12,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:13,007 INFO L225 Difference]: With dead ends: 23298 [2022-03-15 16:16:13,008 INFO L226 Difference]: Without dead ends: 23201 [2022-03-15 16:16:13,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6172 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1866, Invalid=16766, Unknown=0, NotChecked=0, Total=18632 [2022-03-15 16:16:13,009 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 608 mSDsluCounter, 2433 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 2387 SdHoareTripleChecker+Invalid, 2319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 415 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:13,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 2387 Invalid, 2319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1718 Invalid, 0 Unknown, 415 Unchecked, 0.9s Time] [2022-03-15 16:16:13,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23201 states. [2022-03-15 16:16:13,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23201 to 17129. [2022-03-15 16:16:13,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17129 states, 17128 states have (on average 2.265004670714619) internal successors, (38795), 17128 states have internal predecessors, (38795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17129 states to 17129 states and 38795 transitions. [2022-03-15 16:16:13,310 INFO L78 Accepts]: Start accepts. Automaton has 17129 states and 38795 transitions. Word has length 36 [2022-03-15 16:16:13,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:13,310 INFO L470 AbstractCegarLoop]: Abstraction has 17129 states and 38795 transitions. [2022-03-15 16:16:13,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:13,310 INFO L276 IsEmpty]: Start isEmpty. Operand 17129 states and 38795 transitions. [2022-03-15 16:16:13,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:16:13,321 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:13,321 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:16:13,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-03-15 16:16:13,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:13,535 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:16:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:13,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1883854500, now seen corresponding path program 113 times [2022-03-15 16:16:13,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:13,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089569359] [2022-03-15 16:16:13,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:13,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:13,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:13,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089569359] [2022-03-15 16:16:13,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089569359] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:13,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947727720] [2022-03-15 16:16:13,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:16:13,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:13,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:13,817 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:13,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-15 16:16:13,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:16:13,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:13,839 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:16:13,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:14,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:14,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:14,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:14,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:14,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:14,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:14,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:14,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:14,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:14,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:14,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:14,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:14,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:14,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:14,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:14,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:14,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:14,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:14,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:14,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:14,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:14,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:16:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:14,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:15,361 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:16:15,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:16:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:15,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947727720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:15,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:15,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:16:15,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801974043] [2022-03-15 16:16:15,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:15,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:16:15,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:15,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:16:15,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1890, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:16:15,849 INFO L87 Difference]: Start difference. First operand 17129 states and 38795 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:20,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:20,138 INFO L93 Difference]: Finished difference Result 22136 states and 49776 transitions. [2022-03-15 16:16:20,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-03-15 16:16:20,139 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:16:20,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:20,173 INFO L225 Difference]: With dead ends: 22136 [2022-03-15 16:16:20,173 INFO L226 Difference]: Without dead ends: 22083 [2022-03-15 16:16:20,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6461 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2017, Invalid=17723, Unknown=0, NotChecked=0, Total=19740 [2022-03-15 16:16:20,175 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 578 mSDsluCounter, 3002 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 3001 SdHoareTripleChecker+Invalid, 2869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 587 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:20,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 3001 Invalid, 2869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 2126 Invalid, 0 Unknown, 587 Unchecked, 1.0s Time] [2022-03-15 16:16:20,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22083 states. [2022-03-15 16:16:20,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22083 to 17066. [2022-03-15 16:16:20,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17066 states, 17065 states have (on average 2.2646352182830354) internal successors, (38646), 17065 states have internal predecessors, (38646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:20,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17066 states to 17066 states and 38646 transitions. [2022-03-15 16:16:20,467 INFO L78 Accepts]: Start accepts. Automaton has 17066 states and 38646 transitions. Word has length 36 [2022-03-15 16:16:20,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:20,467 INFO L470 AbstractCegarLoop]: Abstraction has 17066 states and 38646 transitions. [2022-03-15 16:16:20,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:20,467 INFO L276 IsEmpty]: Start isEmpty. Operand 17066 states and 38646 transitions. [2022-03-15 16:16:20,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:16:20,478 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:20,478 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:16:20,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-03-15 16:16:20,678 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,SelfDestructingSolverStorable118 [2022-03-15 16:16:20,679 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:16:20,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:20,679 INFO L85 PathProgramCache]: Analyzing trace with hash -880914362, now seen corresponding path program 114 times [2022-03-15 16:16:20,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:20,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264259365] [2022-03-15 16:16:20,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:20,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:20,957 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:20,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264259365] [2022-03-15 16:16:20,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264259365] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:20,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291301318] [2022-03-15 16:16:20,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:16:20,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:20,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:20,958 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:20,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-15 16:16:20,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:16:20,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:20,980 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:16:20,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:21,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:21,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:21,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:21,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:21,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:21,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:21,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:21,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:21,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:21,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:21,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:21,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:21,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:21,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:21,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:21,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:21,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:21,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:21,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:21,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:21,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:21,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:16:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:21,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:22,526 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:16:22,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:16:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:23,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291301318] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:23,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:23,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:16:23,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057100286] [2022-03-15 16:16:23,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:23,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:16:23,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:23,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:16:23,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:16:23,377 INFO L87 Difference]: Start difference. First operand 17066 states and 38646 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:27,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:27,230 INFO L93 Difference]: Finished difference Result 21889 states and 49260 transitions. [2022-03-15 16:16:27,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-15 16:16:27,230 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:16:27,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:27,262 INFO L225 Difference]: With dead ends: 21889 [2022-03-15 16:16:27,263 INFO L226 Difference]: Without dead ends: 21850 [2022-03-15 16:16:27,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5103 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1711, Invalid=14801, Unknown=0, NotChecked=0, Total=16512 [2022-03-15 16:16:27,264 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 466 mSDsluCounter, 3106 mSDsCounter, 0 mSdLazyCounter, 2153 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 3171 SdHoareTripleChecker+Invalid, 3027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 757 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:27,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 3171 Invalid, 3027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2153 Invalid, 0 Unknown, 757 Unchecked, 1.0s Time] [2022-03-15 16:16:27,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21850 states. [2022-03-15 16:16:27,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21850 to 16934. [2022-03-15 16:16:27,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16934 states, 16933 states have (on average 2.264276855843619) internal successors, (38341), 16933 states have internal predecessors, (38341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:27,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16934 states to 16934 states and 38341 transitions. [2022-03-15 16:16:27,547 INFO L78 Accepts]: Start accepts. Automaton has 16934 states and 38341 transitions. Word has length 36 [2022-03-15 16:16:27,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:27,547 INFO L470 AbstractCegarLoop]: Abstraction has 16934 states and 38341 transitions. [2022-03-15 16:16:27,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:27,547 INFO L276 IsEmpty]: Start isEmpty. Operand 16934 states and 38341 transitions. [2022-03-15 16:16:27,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:16:27,557 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:27,558 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:16:27,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-15 16:16:27,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:27,759 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:16:27,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:27,760 INFO L85 PathProgramCache]: Analyzing trace with hash -388811044, now seen corresponding path program 115 times [2022-03-15 16:16:27,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:27,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877916645] [2022-03-15 16:16:27,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:27,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 16:16:27,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:27,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877916645] [2022-03-15 16:16:27,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877916645] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:27,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127082115] [2022-03-15 16:16:27,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:16:27,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:27,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:27,996 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:27,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-15 16:16:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:28,017 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:16:28,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:28,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:28,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:28,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:28,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:28,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:28,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:16:28,692 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:28,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:29,498 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:16:29,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:16:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:29,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127082115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:29,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:29,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 43 [2022-03-15 16:16:29,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853315016] [2022-03-15 16:16:29,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:29,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:16:29,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:29,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:16:29,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1615, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:16:29,947 INFO L87 Difference]: Start difference. First operand 16934 states and 38341 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:32,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:32,761 INFO L93 Difference]: Finished difference Result 24263 states and 54421 transitions. [2022-03-15 16:16:32,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-15 16:16:32,762 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:16:32,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:32,805 INFO L225 Difference]: With dead ends: 24263 [2022-03-15 16:16:32,805 INFO L226 Difference]: Without dead ends: 23822 [2022-03-15 16:16:32,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2997 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1096, Invalid=8024, Unknown=0, NotChecked=0, Total=9120 [2022-03-15 16:16:32,806 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 702 mSDsluCounter, 2177 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 1882 SdHoareTripleChecker+Invalid, 1743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:32,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 1882 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1533 Invalid, 0 Unknown, 57 Unchecked, 0.8s Time] [2022-03-15 16:16:32,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23822 states. [2022-03-15 16:16:33,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23822 to 17393. [2022-03-15 16:16:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17393 states, 17392 states have (on average 2.2667893284268628) internal successors, (39424), 17392 states have internal predecessors, (39424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:33,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17393 states to 17393 states and 39424 transitions. [2022-03-15 16:16:33,161 INFO L78 Accepts]: Start accepts. Automaton has 17393 states and 39424 transitions. Word has length 36 [2022-03-15 16:16:33,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:33,161 INFO L470 AbstractCegarLoop]: Abstraction has 17393 states and 39424 transitions. [2022-03-15 16:16:33,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:33,162 INFO L276 IsEmpty]: Start isEmpty. Operand 17393 states and 39424 transitions. [2022-03-15 16:16:33,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:16:33,172 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:33,172 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:16:33,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-15 16:16:33,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:33,373 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:16:33,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:33,373 INFO L85 PathProgramCache]: Analyzing trace with hash -859146310, now seen corresponding path program 116 times [2022-03-15 16:16:33,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:33,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870478804] [2022-03-15 16:16:33,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:33,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:16:33,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:33,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870478804] [2022-03-15 16:16:33,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870478804] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:33,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943250716] [2022-03-15 16:16:33,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:16:33,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:33,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:33,618 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:33,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-15 16:16:33,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:16:33,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:33,641 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:16:33,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:34,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:34,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:34,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:34,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:34,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:34,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:34,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:34,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:34,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:34,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:34,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:34,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:34,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:34,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:34,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:34,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:34,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:34,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:34,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:34,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:34,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:16:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:34,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:35,156 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:16:35,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:16:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:35,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943250716] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:35,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:35,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 43 [2022-03-15 16:16:35,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110316356] [2022-03-15 16:16:35,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:35,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:16:35,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:35,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:16:35,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1629, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:16:35,710 INFO L87 Difference]: Start difference. First operand 17393 states and 39424 transitions. Second operand has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:39,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:39,061 INFO L93 Difference]: Finished difference Result 26454 states and 59553 transitions. [2022-03-15 16:16:39,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-15 16:16:39,061 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:16:39,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:39,107 INFO L225 Difference]: With dead ends: 26454 [2022-03-15 16:16:39,107 INFO L226 Difference]: Without dead ends: 25978 [2022-03-15 16:16:39,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3826 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1295, Invalid=10261, Unknown=0, NotChecked=0, Total=11556 [2022-03-15 16:16:39,108 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 715 mSDsluCounter, 2612 mSDsCounter, 0 mSdLazyCounter, 1837 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 2058 SdHoareTripleChecker+Invalid, 2150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:39,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 2058 Invalid, 2150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1837 Invalid, 0 Unknown, 117 Unchecked, 0.9s Time] [2022-03-15 16:16:39,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25978 states. [2022-03-15 16:16:39,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25978 to 18150. [2022-03-15 16:16:39,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18150 states, 18149 states have (on average 2.270317923852554) internal successors, (41204), 18149 states have internal predecessors, (41204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:39,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18150 states to 18150 states and 41204 transitions. [2022-03-15 16:16:39,449 INFO L78 Accepts]: Start accepts. Automaton has 18150 states and 41204 transitions. Word has length 36 [2022-03-15 16:16:39,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:39,449 INFO L470 AbstractCegarLoop]: Abstraction has 18150 states and 41204 transitions. [2022-03-15 16:16:39,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:39,449 INFO L276 IsEmpty]: Start isEmpty. Operand 18150 states and 41204 transitions. [2022-03-15 16:16:39,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:16:39,461 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:39,461 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:16:39,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-03-15 16:16:39,661 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,SelfDestructingSolverStorable121 [2022-03-15 16:16:39,661 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:16:39,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:39,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1994665982, now seen corresponding path program 117 times [2022-03-15 16:16:39,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:39,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894909866] [2022-03-15 16:16:39,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:39,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:39,946 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:39,946 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:39,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894909866] [2022-03-15 16:16:39,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894909866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:39,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760870552] [2022-03-15 16:16:39,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:16:39,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:39,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:39,948 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:39,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:16:39,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:39,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-15 16:16:39,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:16:39,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:40,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:40,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:40,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:40,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:40,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:40,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:40,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:40,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:40,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:40,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:40,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:40,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:40,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:40,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:40,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:40,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:40,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:40,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:40,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:40,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:40,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:40,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:40,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:16:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:40,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:41,520 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:16:41,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:16:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:42,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760870552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:42,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:42,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-15 16:16:42,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341965908] [2022-03-15 16:16:42,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:42,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:16:42,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:42,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:16:42,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1809, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:16:42,165 INFO L87 Difference]: Start difference. First operand 18150 states and 41204 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:44,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:44,568 INFO L93 Difference]: Finished difference Result 22612 states and 51090 transitions. [2022-03-15 16:16:44,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-15 16:16:44,568 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:16:44,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:44,605 INFO L225 Difference]: With dead ends: 22612 [2022-03-15 16:16:44,605 INFO L226 Difference]: Without dead ends: 22399 [2022-03-15 16:16:44,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2665 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=956, Invalid=7974, Unknown=0, NotChecked=0, Total=8930 [2022-03-15 16:16:44,606 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 561 mSDsluCounter, 2155 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 437 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:44,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 1787 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1242 Invalid, 0 Unknown, 437 Unchecked, 0.6s Time] [2022-03-15 16:16:44,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22399 states. [2022-03-15 16:16:44,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22399 to 17988. [2022-03-15 16:16:44,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17988 states, 17987 states have (on average 2.2691388224829043) internal successors, (40815), 17987 states have internal predecessors, (40815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:44,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17988 states to 17988 states and 40815 transitions. [2022-03-15 16:16:44,916 INFO L78 Accepts]: Start accepts. Automaton has 17988 states and 40815 transitions. Word has length 36 [2022-03-15 16:16:44,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:44,916 INFO L470 AbstractCegarLoop]: Abstraction has 17988 states and 40815 transitions. [2022-03-15 16:16:44,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:44,916 INFO L276 IsEmpty]: Start isEmpty. Operand 17988 states and 40815 transitions. [2022-03-15 16:16:44,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:16:44,927 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:44,927 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:16:44,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-03-15 16:16:45,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-15 16:16:45,128 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:16:45,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:45,129 INFO L85 PathProgramCache]: Analyzing trace with hash -970191870, now seen corresponding path program 118 times [2022-03-15 16:16:45,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:45,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214124915] [2022-03-15 16:16:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:45,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:16:45,403 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:45,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214124915] [2022-03-15 16:16:45,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214124915] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:45,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257238215] [2022-03-15 16:16:45,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:16:45,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:45,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:45,404 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:45,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-15 16:16:45,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:16:45,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:45,425 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:16:45,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:46,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:46,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:46,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:46,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:46,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:46,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:46,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:46,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:46,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:46,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:46,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:46,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:46,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:46,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:46,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:46,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:46,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:46,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:46,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:46,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:46,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:16:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:46,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:46,949 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:16:46,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:16:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:47,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257238215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:47,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:47,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-03-15 16:16:47,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780462096] [2022-03-15 16:16:47,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:47,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:16:47,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:47,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:16:47,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1702, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:16:47,334 INFO L87 Difference]: Start difference. First operand 17988 states and 40815 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:50,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:16:50,845 INFO L93 Difference]: Finished difference Result 26723 states and 60329 transitions. [2022-03-15 16:16:50,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-15 16:16:50,846 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:16:50,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:16:50,892 INFO L225 Difference]: With dead ends: 26723 [2022-03-15 16:16:50,893 INFO L226 Difference]: Without dead ends: 26270 [2022-03-15 16:16:50,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3802 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1263, Invalid=10509, Unknown=0, NotChecked=0, Total=11772 [2022-03-15 16:16:50,894 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 804 mSDsluCounter, 2807 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 2255 SdHoareTripleChecker+Invalid, 2329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:16:50,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 2255 Invalid, 2329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1973 Invalid, 0 Unknown, 134 Unchecked, 1.0s Time] [2022-03-15 16:16:50,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26270 states. [2022-03-15 16:16:51,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26270 to 18321. [2022-03-15 16:16:51,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18321 states, 18320 states have (on average 2.2674126637554584) internal successors, (41539), 18320 states have internal predecessors, (41539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:51,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18321 states to 18321 states and 41539 transitions. [2022-03-15 16:16:51,287 INFO L78 Accepts]: Start accepts. Automaton has 18321 states and 41539 transitions. Word has length 36 [2022-03-15 16:16:51,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:16:51,288 INFO L470 AbstractCegarLoop]: Abstraction has 18321 states and 41539 transitions. [2022-03-15 16:16:51,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:16:51,288 INFO L276 IsEmpty]: Start isEmpty. Operand 18321 states and 41539 transitions. [2022-03-15 16:16:51,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:16:51,299 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:16:51,299 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:16:51,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-03-15 16:16:51,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-15 16:16:51,499 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:16:51,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:16:51,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1883620422, now seen corresponding path program 119 times [2022-03-15 16:16:51,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:16:51,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160033148] [2022-03-15 16:16:51,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:16:51,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:16:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:16:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:51,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:16:51,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160033148] [2022-03-15 16:16:51,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160033148] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:16:51,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063502016] [2022-03-15 16:16:51,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:16:51,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:16:51,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:16:51,784 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:16:51,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-15 16:16:51,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:16:51,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:16:51,807 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-15 16:16:51,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:16:57,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:57,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:57,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:57,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:57,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:57,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:57,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:57,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:57,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:57,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:57,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:57,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:57,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:57,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:57,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:57,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:57,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:57,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:57,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:57,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:57,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:57,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:57,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:57,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:16:57,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:57,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 26 [2022-03-15 16:16:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:57,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:16:59,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:16:59,161 INFO L353 Elim1Store]: treesize reduction 46, result has 76.4 percent of original size [2022-03-15 16:16:59,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 88 treesize of output 188 [2022-03-15 16:16:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:16:59,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063502016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:16:59,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:16:59,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 49 [2022-03-15 16:16:59,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807678639] [2022-03-15 16:16:59,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:16:59,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-15 16:16:59,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:16:59,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-15 16:16:59,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2066, Unknown=1, NotChecked=0, Total=2450 [2022-03-15 16:16:59,918 INFO L87 Difference]: Start difference. First operand 18321 states and 41539 transitions. Second operand has 50 states, 50 states have (on average 1.98) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:03,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:03,059 INFO L93 Difference]: Finished difference Result 20229 states and 45780 transitions. [2022-03-15 16:17:03,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 16:17:03,060 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:17:03,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:03,093 INFO L225 Difference]: With dead ends: 20229 [2022-03-15 16:17:03,093 INFO L226 Difference]: Without dead ends: 20163 [2022-03-15 16:17:03,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=941, Invalid=7430, Unknown=1, NotChecked=0, Total=8372 [2022-03-15 16:17:03,094 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 348 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1241 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:03,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 1407 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 276 Invalid, 0 Unknown, 1241 Unchecked, 0.1s Time] [2022-03-15 16:17:03,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20163 states. [2022-03-15 16:17:03,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20163 to 18369. [2022-03-15 16:17:03,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18369 states, 18368 states have (on average 2.267530487804878) internal successors, (41650), 18368 states have internal predecessors, (41650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:03,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18369 states to 18369 states and 41650 transitions. [2022-03-15 16:17:03,408 INFO L78 Accepts]: Start accepts. Automaton has 18369 states and 41650 transitions. Word has length 36 [2022-03-15 16:17:03,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:03,408 INFO L470 AbstractCegarLoop]: Abstraction has 18369 states and 41650 transitions. [2022-03-15 16:17:03,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:03,408 INFO L276 IsEmpty]: Start isEmpty. Operand 18369 states and 41650 transitions. [2022-03-15 16:17:03,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:17:03,420 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:03,420 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:03,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-03-15 16:17:03,620 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,SelfDestructingSolverStorable124 [2022-03-15 16:17:03,621 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:17:03,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:03,621 INFO L85 PathProgramCache]: Analyzing trace with hash 331989182, now seen corresponding path program 120 times [2022-03-15 16:17:03,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:03,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577140261] [2022-03-15 16:17:03,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:03,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:03,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:03,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577140261] [2022-03-15 16:17:03,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577140261] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:03,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611486936] [2022-03-15 16:17:03,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:17:03,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:03,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:03,913 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:03,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-15 16:17:03,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:17:03,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:03,936 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:17:03,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:04,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:04,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:04,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:04,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:04,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:04,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:17:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:04,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:05,562 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:17:05,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:17:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:06,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611486936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:06,178 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:06,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:17:06,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602789740] [2022-03-15 16:17:06,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:06,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:17:06,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:06,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:17:06,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1879, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:17:06,179 INFO L87 Difference]: Start difference. First operand 18369 states and 41650 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:08,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:08,241 INFO L93 Difference]: Finished difference Result 21876 states and 49330 transitions. [2022-03-15 16:17:08,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 16:17:08,242 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:17:08,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:08,280 INFO L225 Difference]: With dead ends: 21876 [2022-03-15 16:17:08,280 INFO L226 Difference]: Without dead ends: 21830 [2022-03-15 16:17:08,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2403 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=889, Invalid=7483, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 16:17:08,282 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 415 mSDsluCounter, 1746 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 537 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:08,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 1726 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1057 Invalid, 0 Unknown, 537 Unchecked, 0.5s Time] [2022-03-15 16:17:08,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21830 states. [2022-03-15 16:17:08,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21830 to 18378. [2022-03-15 16:17:08,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18378 states, 18377 states have (on average 2.2670729716493443) internal successors, (41662), 18377 states have internal predecessors, (41662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:08,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18378 states to 18378 states and 41662 transitions. [2022-03-15 16:17:08,611 INFO L78 Accepts]: Start accepts. Automaton has 18378 states and 41662 transitions. Word has length 36 [2022-03-15 16:17:08,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:08,611 INFO L470 AbstractCegarLoop]: Abstraction has 18378 states and 41662 transitions. [2022-03-15 16:17:08,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:08,611 INFO L276 IsEmpty]: Start isEmpty. Operand 18378 states and 41662 transitions. [2022-03-15 16:17:08,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:17:08,623 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:08,623 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:08,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-15 16:17:08,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:08,824 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:17:08,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:08,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1879770856, now seen corresponding path program 121 times [2022-03-15 16:17:08,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:08,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311548329] [2022-03-15 16:17:08,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:08,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:09,098 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:17:09,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:09,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311548329] [2022-03-15 16:17:09,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311548329] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:09,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751134097] [2022-03-15 16:17:09,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:17:09,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:09,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:09,099 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:09,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-15 16:17:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:09,120 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:17:09,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:09,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:09,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:09,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:09,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:09,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:09,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:09,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:09,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:09,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:09,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:09,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:09,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:09,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:09,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:09,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:09,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:09,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:09,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:09,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:09,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:09,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:17:09,843 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:09,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:10,644 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:17:10,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:17:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:11,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751134097] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:11,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:11,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-03-15 16:17:11,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673851240] [2022-03-15 16:17:11,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:11,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:17:11,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:11,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:17:11,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1703, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:17:11,158 INFO L87 Difference]: Start difference. First operand 18378 states and 41662 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:14,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:14,759 INFO L93 Difference]: Finished difference Result 26541 states and 59704 transitions. [2022-03-15 16:17:14,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-15 16:17:14,760 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:17:14,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:14,809 INFO L225 Difference]: With dead ends: 26541 [2022-03-15 16:17:14,809 INFO L226 Difference]: Without dead ends: 26102 [2022-03-15 16:17:14,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3766 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1187, Invalid=10585, Unknown=0, NotChecked=0, Total=11772 [2022-03-15 16:17:14,811 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 666 mSDsluCounter, 3388 mSDsCounter, 0 mSdLazyCounter, 2473 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 2647 SdHoareTripleChecker+Invalid, 2761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 2473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:14,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 2647 Invalid, 2761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 2473 Invalid, 0 Unknown, 131 Unchecked, 1.2s Time] [2022-03-15 16:17:14,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26102 states. [2022-03-15 16:17:15,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26102 to 19569. [2022-03-15 16:17:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19569 states, 19568 states have (on average 2.26829517579722) internal successors, (44386), 19568 states have internal predecessors, (44386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:15,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19569 states to 19569 states and 44386 transitions. [2022-03-15 16:17:15,205 INFO L78 Accepts]: Start accepts. Automaton has 19569 states and 44386 transitions. Word has length 36 [2022-03-15 16:17:15,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:15,205 INFO L470 AbstractCegarLoop]: Abstraction has 19569 states and 44386 transitions. [2022-03-15 16:17:15,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:15,206 INFO L276 IsEmpty]: Start isEmpty. Operand 19569 states and 44386 transitions. [2022-03-15 16:17:15,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:17:15,217 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:15,217 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:15,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-03-15 16:17:15,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:15,419 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:17:15,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:15,419 INFO L85 PathProgramCache]: Analyzing trace with hash 941224336, now seen corresponding path program 122 times [2022-03-15 16:17:15,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:15,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659490718] [2022-03-15 16:17:15,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:15,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:15,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:15,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659490718] [2022-03-15 16:17:15,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659490718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:15,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138220263] [2022-03-15 16:17:15,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:17:15,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:15,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:15,704 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:15,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-15 16:17:15,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:17:15,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:15,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:17:15,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:16,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:16,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:16,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:16,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:16,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:16,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:16,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:16,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:16,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:16,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:16,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:16,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:16,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:16,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:16,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:16,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:16,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:16,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:16,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:16,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:16,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:16,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:17:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:16,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:17,276 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:17:17,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:17:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:17,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138220263] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:17,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:17,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-15 16:17:17,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555416703] [2022-03-15 16:17:17,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:17,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:17:17,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:17,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:17:17,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1791, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:17:17,886 INFO L87 Difference]: Start difference. First operand 19569 states and 44386 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:21,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:21,829 INFO L93 Difference]: Finished difference Result 32378 states and 72946 transitions. [2022-03-15 16:17:21,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-15 16:17:21,829 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:17:21,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:21,890 INFO L225 Difference]: With dead ends: 32378 [2022-03-15 16:17:21,890 INFO L226 Difference]: Without dead ends: 32260 [2022-03-15 16:17:21,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5474 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1680, Invalid=14832, Unknown=0, NotChecked=0, Total=16512 [2022-03-15 16:17:21,891 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 489 mSDsluCounter, 2194 mSDsCounter, 0 mSdLazyCounter, 1676 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 2103 SdHoareTripleChecker+Invalid, 1957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:21,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 2103 Invalid, 1957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1676 Invalid, 0 Unknown, 89 Unchecked, 0.9s Time] [2022-03-15 16:17:21,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32260 states. [2022-03-15 16:17:22,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32260 to 19458. [2022-03-15 16:17:22,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19458 states, 19457 states have (on average 2.268129721950969) internal successors, (44131), 19457 states have internal predecessors, (44131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:22,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19458 states to 19458 states and 44131 transitions. [2022-03-15 16:17:22,330 INFO L78 Accepts]: Start accepts. Automaton has 19458 states and 44131 transitions. Word has length 36 [2022-03-15 16:17:22,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:22,330 INFO L470 AbstractCegarLoop]: Abstraction has 19458 states and 44131 transitions. [2022-03-15 16:17:22,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:22,330 INFO L276 IsEmpty]: Start isEmpty. Operand 19458 states and 44131 transitions. [2022-03-15 16:17:22,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:17:22,343 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:22,343 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:22,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-03-15 16:17:22,547 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,SelfDestructingSolverStorable127 [2022-03-15 16:17:22,547 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:17:22,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:22,548 INFO L85 PathProgramCache]: Analyzing trace with hash 974041436, now seen corresponding path program 123 times [2022-03-15 16:17:22,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:22,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227360759] [2022-03-15 16:17:22,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:22,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:22,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:22,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227360759] [2022-03-15 16:17:22,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227360759] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:22,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817010116] [2022-03-15 16:17:22,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:17:22,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:22,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:22,841 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:22,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-15 16:17:22,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:17:22,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:22,866 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-15 16:17:22,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:23,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:23,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:23,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:23,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:23,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:23,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:23,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:23,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:23,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:23,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:23,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:23,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:23,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:23,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:23,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:23,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:23,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:23,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:23,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:23,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:23,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:23,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 33 [2022-03-15 16:17:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:23,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:24,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:24,969 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:17:24,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 198 [2022-03-15 16:17:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:25,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817010116] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:25,504 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:25,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 47 [2022-03-15 16:17:25,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786243721] [2022-03-15 16:17:25,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:25,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 16:17:25,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:25,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 16:17:25,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1863, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:17:25,505 INFO L87 Difference]: Start difference. First operand 19458 states and 44131 transitions. Second operand has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:26,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:26,999 INFO L93 Difference]: Finished difference Result 19806 states and 44834 transitions. [2022-03-15 16:17:26,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 16:17:26,999 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:17:26,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:27,033 INFO L225 Difference]: With dead ends: 19806 [2022-03-15 16:17:27,033 INFO L226 Difference]: Without dead ends: 19791 [2022-03-15 16:17:27,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=731, Invalid=4239, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 16:17:27,033 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 353 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 651 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:27,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 1144 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 181 Invalid, 0 Unknown, 651 Unchecked, 0.1s Time] [2022-03-15 16:17:27,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19791 states. [2022-03-15 16:17:27,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19791 to 19521. [2022-03-15 16:17:27,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19521 states, 19520 states have (on average 2.26890368852459) internal successors, (44289), 19520 states have internal predecessors, (44289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19521 states to 19521 states and 44289 transitions. [2022-03-15 16:17:27,350 INFO L78 Accepts]: Start accepts. Automaton has 19521 states and 44289 transitions. Word has length 36 [2022-03-15 16:17:27,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:27,350 INFO L470 AbstractCegarLoop]: Abstraction has 19521 states and 44289 transitions. [2022-03-15 16:17:27,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:27,350 INFO L276 IsEmpty]: Start isEmpty. Operand 19521 states and 44289 transitions. [2022-03-15 16:17:27,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:17:27,362 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:27,362 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:27,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:27,562 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,SelfDestructingSolverStorable128 [2022-03-15 16:17:27,563 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:17:27,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:27,563 INFO L85 PathProgramCache]: Analyzing trace with hash -577589804, now seen corresponding path program 124 times [2022-03-15 16:17:27,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:27,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373189684] [2022-03-15 16:17:27,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:27,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:27,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:27,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373189684] [2022-03-15 16:17:27,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373189684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:27,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037970350] [2022-03-15 16:17:27,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:17:27,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:27,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:27,866 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:27,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-15 16:17:27,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:17:27,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:27,891 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:17:27,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:28,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:28,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:28,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:28,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:28,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:28,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:28,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:28,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:28,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:28,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:28,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:28,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:28,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:28,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:28,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:28,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:28,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:28,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:28,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:28,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:28,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:17:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:28,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:29,516 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:17:29,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:17:30,114 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:30,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037970350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:30,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:30,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:17:30,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054938733] [2022-03-15 16:17:30,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:30,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:17:30,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:30,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:17:30,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1884, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:17:30,115 INFO L87 Difference]: Start difference. First operand 19521 states and 44289 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:33,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:33,030 INFO L93 Difference]: Finished difference Result 22326 states and 50363 transitions. [2022-03-15 16:17:33,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-15 16:17:33,030 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:17:33,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:33,067 INFO L225 Difference]: With dead ends: 22326 [2022-03-15 16:17:33,067 INFO L226 Difference]: Without dead ends: 22288 [2022-03-15 16:17:33,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3812 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1347, Invalid=11085, Unknown=0, NotChecked=0, Total=12432 [2022-03-15 16:17:33,068 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 419 mSDsluCounter, 2455 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 2433 SdHoareTripleChecker+Invalid, 2046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 520 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:33,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 2433 Invalid, 2046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1430 Invalid, 0 Unknown, 520 Unchecked, 0.7s Time] [2022-03-15 16:17:33,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22288 states. [2022-03-15 16:17:33,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22288 to 19737. [2022-03-15 16:17:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19737 states, 19736 states have (on average 2.26940616132955) internal successors, (44789), 19736 states have internal predecessors, (44789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19737 states to 19737 states and 44789 transitions. [2022-03-15 16:17:33,397 INFO L78 Accepts]: Start accepts. Automaton has 19737 states and 44789 transitions. Word has length 36 [2022-03-15 16:17:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:33,397 INFO L470 AbstractCegarLoop]: Abstraction has 19737 states and 44789 transitions. [2022-03-15 16:17:33,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 19737 states and 44789 transitions. [2022-03-15 16:17:33,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:17:33,410 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:33,410 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:33,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:33,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-15 16:17:33,610 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:17:33,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:33,611 INFO L85 PathProgramCache]: Analyzing trace with hash 425350334, now seen corresponding path program 125 times [2022-03-15 16:17:33,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:33,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85549349] [2022-03-15 16:17:33,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:33,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:33,931 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:33,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85549349] [2022-03-15 16:17:33,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85549349] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:33,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498413093] [2022-03-15 16:17:33,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:17:33,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:33,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:33,932 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:33,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-15 16:17:33,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:17:33,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:33,995 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:17:33,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:34,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:34,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:34,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:34,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:34,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:34,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:34,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:34,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:34,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:34,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:34,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:34,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:34,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:34,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:34,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:34,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:34,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:34,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:34,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:34,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:34,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:34,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:34,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:17:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:34,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:35,541 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:17:35,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:17:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:36,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498413093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:36,227 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:36,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:17:36,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850331476] [2022-03-15 16:17:36,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:36,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:17:36,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:36,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:17:36,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1893, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:17:36,228 INFO L87 Difference]: Start difference. First operand 19737 states and 44789 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:38,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:38,825 INFO L93 Difference]: Finished difference Result 23535 states and 53128 transitions. [2022-03-15 16:17:38,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-15 16:17:38,825 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:17:38,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:38,867 INFO L225 Difference]: With dead ends: 23535 [2022-03-15 16:17:38,867 INFO L226 Difference]: Without dead ends: 23496 [2022-03-15 16:17:38,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3032 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1088, Invalid=9214, Unknown=0, NotChecked=0, Total=10302 [2022-03-15 16:17:38,868 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 422 mSDsluCounter, 2521 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 2492 SdHoareTripleChecker+Invalid, 2103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 415 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:38,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 2492 Invalid, 2103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1594 Invalid, 0 Unknown, 415 Unchecked, 0.7s Time] [2022-03-15 16:17:38,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23496 states. [2022-03-15 16:17:39,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23496 to 19816. [2022-03-15 16:17:39,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19816 states, 19815 states have (on average 2.2694423416603584) internal successors, (44969), 19815 states have internal predecessors, (44969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:39,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19816 states to 19816 states and 44969 transitions. [2022-03-15 16:17:39,207 INFO L78 Accepts]: Start accepts. Automaton has 19816 states and 44969 transitions. Word has length 36 [2022-03-15 16:17:39,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:39,207 INFO L470 AbstractCegarLoop]: Abstraction has 19816 states and 44969 transitions. [2022-03-15 16:17:39,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:39,207 INFO L276 IsEmpty]: Start isEmpty. Operand 19816 states and 44969 transitions. [2022-03-15 16:17:39,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:17:39,220 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:39,220 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:39,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:39,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:39,423 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:17:39,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:39,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1220371616, now seen corresponding path program 126 times [2022-03-15 16:17:39,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:39,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112094562] [2022-03-15 16:17:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:39,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:17:39,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:39,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112094562] [2022-03-15 16:17:39,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112094562] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:39,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375556963] [2022-03-15 16:17:39,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:17:39,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:39,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:39,715 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:39,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-15 16:17:39,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:17:39,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:39,738 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-15 16:17:39,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:40,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:40,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:40,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:40,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:40,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:40,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:40,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:40,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:40,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:40,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:40,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:40,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:40,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:40,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:40,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:40,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:40,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:40,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:40,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:40,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:40,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2022-03-15 16:17:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:40,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:41,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:41,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:17:41,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 208 [2022-03-15 16:17:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:41,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375556963] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:41,618 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:41,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 45 [2022-03-15 16:17:41,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511709232] [2022-03-15 16:17:41,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:41,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:17:41,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:41,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:17:41,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1663, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:17:41,619 INFO L87 Difference]: Start difference. First operand 19816 states and 44969 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:44,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:44,787 INFO L93 Difference]: Finished difference Result 25393 states and 57198 transitions. [2022-03-15 16:17:44,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-15 16:17:44,788 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:17:44,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:44,839 INFO L225 Difference]: With dead ends: 25393 [2022-03-15 16:17:44,839 INFO L226 Difference]: Without dead ends: 25096 [2022-03-15 16:17:44,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2668 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1281, Invalid=7091, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 16:17:44,840 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 687 mSDsluCounter, 1908 mSDsCounter, 0 mSdLazyCounter, 1338 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:44,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [687 Valid, 1525 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1338 Invalid, 0 Unknown, 112 Unchecked, 0.8s Time] [2022-03-15 16:17:44,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25096 states. [2022-03-15 16:17:45,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25096 to 20221. [2022-03-15 16:17:45,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20221 states, 20220 states have (on average 2.26864490603363) internal successors, (45872), 20220 states have internal predecessors, (45872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:45,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20221 states to 20221 states and 45872 transitions. [2022-03-15 16:17:45,276 INFO L78 Accepts]: Start accepts. Automaton has 20221 states and 45872 transitions. Word has length 36 [2022-03-15 16:17:45,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:45,276 INFO L470 AbstractCegarLoop]: Abstraction has 20221 states and 45872 transitions. [2022-03-15 16:17:45,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:45,276 INFO L276 IsEmpty]: Start isEmpty. Operand 20221 states and 45872 transitions. [2022-03-15 16:17:45,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:17:45,288 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:45,288 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:45,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:45,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:45,501 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:17:45,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:45,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1600623576, now seen corresponding path program 127 times [2022-03-15 16:17:45,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:45,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634314224] [2022-03-15 16:17:45,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:45,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:45,860 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:45,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634314224] [2022-03-15 16:17:45,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634314224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:45,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902595727] [2022-03-15 16:17:45,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:17:45,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:45,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:45,861 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:45,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-15 16:17:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:45,882 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:17:45,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:46,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:46,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:46,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:46,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:46,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:46,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:46,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:46,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:46,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:46,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:46,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:46,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:46,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:46,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:46,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:46,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:46,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:46,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:46,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:46,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:46,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:46,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:46,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:46,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:46,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:17:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:46,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:47,442 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:17:47,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:17:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:48,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902595727] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:48,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:48,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-15 16:17:48,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276030422] [2022-03-15 16:17:48,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:48,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:17:48,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:48,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:17:48,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1786, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:17:48,109 INFO L87 Difference]: Start difference. First operand 20221 states and 45872 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:50,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:50,893 INFO L93 Difference]: Finished difference Result 27896 states and 62946 transitions. [2022-03-15 16:17:50,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-15 16:17:50,894 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:17:50,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:50,952 INFO L225 Difference]: With dead ends: 27896 [2022-03-15 16:17:50,952 INFO L226 Difference]: Without dead ends: 27812 [2022-03-15 16:17:50,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3322 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1077, Invalid=9843, Unknown=0, NotChecked=0, Total=10920 [2022-03-15 16:17:50,954 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 478 mSDsluCounter, 1836 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:50,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 1702 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1404 Invalid, 0 Unknown, 79 Unchecked, 0.7s Time] [2022-03-15 16:17:50,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27812 states. [2022-03-15 16:17:51,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27812 to 20209. [2022-03-15 16:17:51,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20209 states, 20208 states have (on average 2.2689528899445763) internal successors, (45851), 20208 states have internal predecessors, (45851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:51,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20209 states to 20209 states and 45851 transitions. [2022-03-15 16:17:51,362 INFO L78 Accepts]: Start accepts. Automaton has 20209 states and 45851 transitions. Word has length 36 [2022-03-15 16:17:51,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:51,363 INFO L470 AbstractCegarLoop]: Abstraction has 20209 states and 45851 transitions. [2022-03-15 16:17:51,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:51,363 INFO L276 IsEmpty]: Start isEmpty. Operand 20209 states and 45851 transitions. [2022-03-15 16:17:51,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:17:51,376 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:51,376 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:51,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-03-15 16:17:51,577 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,SelfDestructingSolverStorable132 [2022-03-15 16:17:51,577 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:17:51,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:51,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1239728190, now seen corresponding path program 128 times [2022-03-15 16:17:51,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:51,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191427666] [2022-03-15 16:17:51,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:51,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:51,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:51,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191427666] [2022-03-15 16:17:51,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191427666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:51,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591894283] [2022-03-15 16:17:51,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:17:51,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:51,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:51,886 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:51,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-15 16:17:51,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:17:51,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:51,907 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:17:51,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:52,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:52,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:52,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:52,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:52,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:52,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:52,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:52,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:52,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:52,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:52,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:52,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:52,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:52,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:52,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:52,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:52,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:52,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:52,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:52,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:52,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:52,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:17:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:52,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:53,494 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:17:53,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:17:53,896 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:53,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591894283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:17:53,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:17:53,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 45 [2022-03-15 16:17:53,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138922339] [2022-03-15 16:17:53,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:17:53,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:17:53,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:17:53,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:17:53,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1787, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:17:53,897 INFO L87 Difference]: Start difference. First operand 20209 states and 45851 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:57,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:17:57,175 INFO L93 Difference]: Finished difference Result 25666 states and 57828 transitions. [2022-03-15 16:17:57,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-15 16:17:57,175 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:17:57,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:17:57,227 INFO L225 Difference]: With dead ends: 25666 [2022-03-15 16:17:57,227 INFO L226 Difference]: Without dead ends: 25588 [2022-03-15 16:17:57,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3368 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1108, Invalid=10234, Unknown=0, NotChecked=0, Total=11342 [2022-03-15 16:17:57,228 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 489 mSDsluCounter, 2437 mSDsCounter, 0 mSdLazyCounter, 1876 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 2287 SdHoareTripleChecker+Invalid, 2195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:17:57,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 2287 Invalid, 2195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1876 Invalid, 0 Unknown, 185 Unchecked, 0.9s Time] [2022-03-15 16:17:57,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25588 states. [2022-03-15 16:17:57,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25588 to 20392. [2022-03-15 16:17:57,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20392 states, 20391 states have (on average 2.269089304104752) internal successors, (46269), 20391 states have internal predecessors, (46269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:57,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20392 states to 20392 states and 46269 transitions. [2022-03-15 16:17:57,625 INFO L78 Accepts]: Start accepts. Automaton has 20392 states and 46269 transitions. Word has length 36 [2022-03-15 16:17:57,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:17:57,625 INFO L470 AbstractCegarLoop]: Abstraction has 20392 states and 46269 transitions. [2022-03-15 16:17:57,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:17:57,625 INFO L276 IsEmpty]: Start isEmpty. Operand 20392 states and 46269 transitions. [2022-03-15 16:17:57,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:17:57,637 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:17:57,638 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:17:57,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-03-15 16:17:57,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-15 16:17:57,838 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:17:57,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:17:57,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1633440676, now seen corresponding path program 129 times [2022-03-15 16:17:57,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:17:57,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146273654] [2022-03-15 16:17:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:17:57,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:17:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:17:58,131 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:58,131 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:17:58,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146273654] [2022-03-15 16:17:58,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146273654] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:17:58,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671249235] [2022-03-15 16:17:58,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:17:58,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:17:58,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:17:58,133 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:17:58,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-15 16:17:58,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:17:58,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:17:58,155 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:17:58,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:17:58,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:58,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:58,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:58,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:58,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:58,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:58,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:58,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:58,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:58,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:58,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:58,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:58,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:58,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:58,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:58,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:58,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:58,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:58,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:58,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:58,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:17:58,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:17:58,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:17:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:17:58,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:17:59,771 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:17:59,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:18:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:00,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671249235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:00,260 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:00,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:18:00,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20902156] [2022-03-15 16:18:00,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:00,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:18:00,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:00,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:18:00,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1881, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:18:00,260 INFO L87 Difference]: Start difference. First operand 20392 states and 46269 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:04,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:04,006 INFO L93 Difference]: Finished difference Result 25317 states and 56975 transitions. [2022-03-15 16:18:04,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-15 16:18:04,006 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:18:04,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:04,119 INFO L225 Difference]: With dead ends: 25317 [2022-03-15 16:18:04,119 INFO L226 Difference]: Without dead ends: 25250 [2022-03-15 16:18:04,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5525 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1804, Invalid=15226, Unknown=0, NotChecked=0, Total=17030 [2022-03-15 16:18:04,120 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 468 mSDsluCounter, 2875 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 2723 SdHoareTripleChecker+Invalid, 2527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 705 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:04,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 2723 Invalid, 2527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1708 Invalid, 0 Unknown, 705 Unchecked, 0.8s Time] [2022-03-15 16:18:04,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25250 states. [2022-03-15 16:18:04,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25250 to 20890. [2022-03-15 16:18:04,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20890 states, 20889 states have (on average 2.2714347264110297) internal successors, (47448), 20889 states have internal predecessors, (47448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:04,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20890 states to 20890 states and 47448 transitions. [2022-03-15 16:18:04,450 INFO L78 Accepts]: Start accepts. Automaton has 20890 states and 47448 transitions. Word has length 36 [2022-03-15 16:18:04,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:04,450 INFO L470 AbstractCegarLoop]: Abstraction has 20890 states and 47448 transitions. [2022-03-15 16:18:04,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:04,450 INFO L276 IsEmpty]: Start isEmpty. Operand 20890 states and 47448 transitions. [2022-03-15 16:18:04,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:18:04,464 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:04,464 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:04,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-03-15 16:18:04,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-15 16:18:04,664 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:04,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:04,665 INFO L85 PathProgramCache]: Analyzing trace with hash 81809436, now seen corresponding path program 130 times [2022-03-15 16:18:04,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:04,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253299499] [2022-03-15 16:18:04,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:04,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:04,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:04,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253299499] [2022-03-15 16:18:04,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253299499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:04,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604742365] [2022-03-15 16:18:04,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:18:04,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:04,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:04,963 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:04,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-15 16:18:04,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:18:04,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:04,984 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:18:04,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:05,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:05,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:05,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:05,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:05,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:05,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:05,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:05,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:05,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:05,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:05,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:05,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:05,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:05,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:05,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:05,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:05,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:05,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:05,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:05,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:05,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:18:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:05,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:06,563 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:18:06,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:18:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:07,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604742365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:07,291 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:07,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:18:07,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628669875] [2022-03-15 16:18:07,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:07,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:18:07,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:07,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:18:07,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1877, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:18:07,292 INFO L87 Difference]: Start difference. First operand 20890 states and 47448 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:09,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:09,468 INFO L93 Difference]: Finished difference Result 24786 states and 56051 transitions. [2022-03-15 16:18:09,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 16:18:09,468 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:18:09,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:09,520 INFO L225 Difference]: With dead ends: 24786 [2022-03-15 16:18:09,520 INFO L226 Difference]: Without dead ends: 24748 [2022-03-15 16:18:09,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2468 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=947, Invalid=7609, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 16:18:09,522 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 461 mSDsluCounter, 2041 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 477 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:09,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 1990 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1363 Invalid, 0 Unknown, 477 Unchecked, 0.6s Time] [2022-03-15 16:18:09,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24748 states. [2022-03-15 16:18:09,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24748 to 20899. [2022-03-15 16:18:09,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20899 states, 20898 states have (on average 2.2714135323954445) internal successors, (47468), 20898 states have internal predecessors, (47468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:09,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20899 states to 20899 states and 47468 transitions. [2022-03-15 16:18:09,933 INFO L78 Accepts]: Start accepts. Automaton has 20899 states and 47468 transitions. Word has length 36 [2022-03-15 16:18:09,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:09,933 INFO L470 AbstractCegarLoop]: Abstraction has 20899 states and 47468 transitions. [2022-03-15 16:18:09,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:09,933 INFO L276 IsEmpty]: Start isEmpty. Operand 20899 states and 47468 transitions. [2022-03-15 16:18:09,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:18:09,947 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:09,947 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:09,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-15 16:18:10,147 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,SelfDestructingSolverStorable135 [2022-03-15 16:18:10,148 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:10,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:10,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1084749574, now seen corresponding path program 131 times [2022-03-15 16:18:10,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:10,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612265745] [2022-03-15 16:18:10,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:10,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:10,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:10,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612265745] [2022-03-15 16:18:10,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612265745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:10,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745032481] [2022-03-15 16:18:10,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:18:10,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:10,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:10,450 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:10,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-15 16:18:10,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:18:10,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:10,518 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:18:10,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:11,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:11,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:11,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:11,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:11,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:11,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:11,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:11,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:11,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:11,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:11,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:11,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:11,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:11,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:11,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:11,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:11,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:11,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:11,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:11,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:11,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:18:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:11,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:12,077 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:18:12,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:18:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:12,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745032481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:12,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:12,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:18:12,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334519599] [2022-03-15 16:18:12,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:12,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:18:12,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:12,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:18:12,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1889, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:18:12,830 INFO L87 Difference]: Start difference. First operand 20899 states and 47468 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:15,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:15,267 INFO L93 Difference]: Finished difference Result 24821 states and 56109 transitions. [2022-03-15 16:18:15,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-15 16:18:15,268 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:18:15,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:15,377 INFO L225 Difference]: With dead ends: 24821 [2022-03-15 16:18:15,377 INFO L226 Difference]: Without dead ends: 24782 [2022-03-15 16:18:15,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2814 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1062, Invalid=8444, Unknown=0, NotChecked=0, Total=9506 [2022-03-15 16:18:15,378 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 490 mSDsluCounter, 2141 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 2137 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 475 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:15,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 2137 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1441 Invalid, 0 Unknown, 475 Unchecked, 0.7s Time] [2022-03-15 16:18:15,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24782 states. [2022-03-15 16:18:15,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24782 to 20977. [2022-03-15 16:18:15,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20977 states, 20976 states have (on average 2.2714530892448512) internal successors, (47646), 20976 states have internal predecessors, (47646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20977 states to 20977 states and 47646 transitions. [2022-03-15 16:18:15,730 INFO L78 Accepts]: Start accepts. Automaton has 20977 states and 47646 transitions. Word has length 36 [2022-03-15 16:18:15,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:15,731 INFO L470 AbstractCegarLoop]: Abstraction has 20977 states and 47646 transitions. [2022-03-15 16:18:15,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:15,731 INFO L276 IsEmpty]: Start isEmpty. Operand 20977 states and 47646 transitions. [2022-03-15 16:18:15,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:18:15,744 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:15,744 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:15,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:15,944 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,SelfDestructingSolverStorable136 [2022-03-15 16:18:15,945 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:15,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:15,946 INFO L85 PathProgramCache]: Analyzing trace with hash 320779646, now seen corresponding path program 132 times [2022-03-15 16:18:15,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:15,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395775024] [2022-03-15 16:18:15,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:15,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:16,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:16,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395775024] [2022-03-15 16:18:16,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395775024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:16,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709575702] [2022-03-15 16:18:16,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:18:16,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:16,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:16,278 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:16,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-15 16:18:16,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:18:16,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:16,302 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:18:16,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:17,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:17,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:17,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:17,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:17,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:17,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:17,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:17,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:17,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:17,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:17,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:17,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:17,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:17,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:17,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:17,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:17,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:17,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:17,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:17,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:17,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:18:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:17,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:17,880 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:18:17,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:18:18,751 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:18,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709575702] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:18,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:18,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:18:18,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251299901] [2022-03-15 16:18:18,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:18,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:18:18,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:18,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:18:18,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1878, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:18:18,754 INFO L87 Difference]: Start difference. First operand 20977 states and 47646 transitions. Second operand has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:20,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:20,471 INFO L93 Difference]: Finished difference Result 25082 states and 56692 transitions. [2022-03-15 16:18:20,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 16:18:20,471 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:18:20,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:20,522 INFO L225 Difference]: With dead ends: 25082 [2022-03-15 16:18:20,522 INFO L226 Difference]: Without dead ends: 25042 [2022-03-15 16:18:20,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=798, Invalid=6174, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 16:18:20,523 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 315 mSDsluCounter, 2178 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 2123 SdHoareTripleChecker+Invalid, 1903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 502 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:20,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 2123 Invalid, 1903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1355 Invalid, 0 Unknown, 502 Unchecked, 0.6s Time] [2022-03-15 16:18:20,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25042 states. [2022-03-15 16:18:20,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25042 to 21152. [2022-03-15 16:18:20,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21152 states, 21151 states have (on average 2.2719020377287125) internal successors, (48053), 21151 states have internal predecessors, (48053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:20,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21152 states to 21152 states and 48053 transitions. [2022-03-15 16:18:20,917 INFO L78 Accepts]: Start accepts. Automaton has 21152 states and 48053 transitions. Word has length 36 [2022-03-15 16:18:20,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:20,917 INFO L470 AbstractCegarLoop]: Abstraction has 21152 states and 48053 transitions. [2022-03-15 16:18:20,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:20,918 INFO L276 IsEmpty]: Start isEmpty. Operand 21152 states and 48053 transitions. [2022-03-15 16:18:20,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:18:20,932 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:20,932 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:20,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-03-15 16:18:21,132 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,SelfDestructingSolverStorable137 [2022-03-15 16:18:21,132 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:21,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:21,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1326062606, now seen corresponding path program 133 times [2022-03-15 16:18:21,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:21,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641288988] [2022-03-15 16:18:21,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:21,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:21,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:21,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641288988] [2022-03-15 16:18:21,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641288988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:21,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391170587] [2022-03-15 16:18:21,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:18:21,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:21,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:21,408 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:21,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-15 16:18:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:21,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:18:21,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:22,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:22,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:22,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:22,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:22,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:22,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:22,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:22,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:22,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:22,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:22,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:22,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:22,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:22,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:22,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:22,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:22,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:22,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:18:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:22,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:23,105 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:18:23,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:18:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:23,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391170587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:23,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:23,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:18:23,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10041119] [2022-03-15 16:18:23,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:23,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:18:23,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:23,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:18:23,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1925, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:18:23,862 INFO L87 Difference]: Start difference. First operand 21152 states and 48053 transitions. Second operand has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:27,401 INFO L93 Difference]: Finished difference Result 32939 states and 74582 transitions. [2022-03-15 16:18:27,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-15 16:18:27,402 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:18:27,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:27,471 INFO L225 Difference]: With dead ends: 32939 [2022-03-15 16:18:27,471 INFO L226 Difference]: Without dead ends: 32818 [2022-03-15 16:18:27,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 40 SyntacticMatches, 8 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3455 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1023, Invalid=10533, Unknown=0, NotChecked=0, Total=11556 [2022-03-15 16:18:27,472 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 671 mSDsluCounter, 2643 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 2514 SdHoareTripleChecker+Invalid, 2497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 619 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:27,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 2514 Invalid, 2497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1697 Invalid, 0 Unknown, 619 Unchecked, 0.8s Time] [2022-03-15 16:18:27,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32818 states. [2022-03-15 16:18:27,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32818 to 20086. [2022-03-15 16:18:27,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20086 states, 20085 states have (on average 2.270450585013692) internal successors, (45602), 20085 states have internal predecessors, (45602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:27,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20086 states to 20086 states and 45602 transitions. [2022-03-15 16:18:27,935 INFO L78 Accepts]: Start accepts. Automaton has 20086 states and 45602 transitions. Word has length 36 [2022-03-15 16:18:27,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:27,935 INFO L470 AbstractCegarLoop]: Abstraction has 20086 states and 45602 transitions. [2022-03-15 16:18:27,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:27,935 INFO L276 IsEmpty]: Start isEmpty. Operand 20086 states and 45602 transitions. [2022-03-15 16:18:27,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:18:27,949 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:27,949 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:27,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-03-15 16:18:28,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:28,149 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:28,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:28,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1616589660, now seen corresponding path program 134 times [2022-03-15 16:18:28,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:28,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924444281] [2022-03-15 16:18:28,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:28,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:28,444 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:28,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924444281] [2022-03-15 16:18:28,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924444281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:28,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558267456] [2022-03-15 16:18:28,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:18:28,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:28,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:28,446 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:28,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-15 16:18:28,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:18:28,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:28,468 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:18:28,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:29,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:29,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:29,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:29,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:29,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:29,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:29,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:29,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:29,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:29,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:29,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:29,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:29,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:29,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:29,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:29,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:29,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:18:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:29,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:30,021 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:18:30,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:18:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:30,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558267456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:30,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:30,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-03-15 16:18:30,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708921890] [2022-03-15 16:18:30,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:30,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:18:30,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:30,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:18:30,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1812, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:18:30,520 INFO L87 Difference]: Start difference. First operand 20086 states and 45602 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:34,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:34,044 INFO L93 Difference]: Finished difference Result 27695 states and 62521 transitions. [2022-03-15 16:18:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-15 16:18:34,044 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:18:34,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:34,102 INFO L225 Difference]: With dead ends: 27695 [2022-03-15 16:18:34,102 INFO L226 Difference]: Without dead ends: 27651 [2022-03-15 16:18:34,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4449 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1518, Invalid=12762, Unknown=0, NotChecked=0, Total=14280 [2022-03-15 16:18:34,104 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 636 mSDsluCounter, 2167 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 2147 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 537 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:34,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 2147 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1394 Invalid, 0 Unknown, 537 Unchecked, 0.7s Time] [2022-03-15 16:18:34,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27651 states. [2022-03-15 16:18:34,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27651 to 20113. [2022-03-15 16:18:34,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20113 states, 20112 states have (on average 2.270236674622116) internal successors, (45659), 20112 states have internal predecessors, (45659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:34,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20113 states to 20113 states and 45659 transitions. [2022-03-15 16:18:34,532 INFO L78 Accepts]: Start accepts. Automaton has 20113 states and 45659 transitions. Word has length 36 [2022-03-15 16:18:34,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:34,532 INFO L470 AbstractCegarLoop]: Abstraction has 20113 states and 45659 transitions. [2022-03-15 16:18:34,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:34,532 INFO L276 IsEmpty]: Start isEmpty. Operand 20113 states and 45659 transitions. [2022-03-15 16:18:34,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:18:34,547 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:34,547 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:34,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-03-15 16:18:34,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-03-15 16:18:34,747 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:34,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:34,748 INFO L85 PathProgramCache]: Analyzing trace with hash 707010674, now seen corresponding path program 135 times [2022-03-15 16:18:34,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:34,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040913129] [2022-03-15 16:18:34,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:34,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:35,085 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:35,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040913129] [2022-03-15 16:18:35,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040913129] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:35,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270561960] [2022-03-15 16:18:35,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:18:35,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:35,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:35,086 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:35,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-15 16:18:35,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:18:35,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:35,111 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-15 16:18:35,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:35,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:35,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:35,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:35,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:35,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:35,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:35,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:35,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:35,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:35,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:35,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:35,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:35,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:36,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:36,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:36,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:36,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:36,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 33 [2022-03-15 16:18:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:36,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:36,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:36,974 INFO L353 Elim1Store]: treesize reduction 74, result has 67.4 percent of original size [2022-03-15 16:18:36,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 24 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 92 treesize of output 192 [2022-03-15 16:18:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:37,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270561960] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:37,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:37,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:18:37,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578955238] [2022-03-15 16:18:37,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:37,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:18:37,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:37,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:18:37,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=1768, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:18:37,237 INFO L87 Difference]: Start difference. First operand 20113 states and 45659 transitions. Second operand has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:43,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:43,790 INFO L93 Difference]: Finished difference Result 28060 states and 63167 transitions. [2022-03-15 16:18:43,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-03-15 16:18:43,790 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:18:43,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:43,846 INFO L225 Difference]: With dead ends: 28060 [2022-03-15 16:18:43,846 INFO L226 Difference]: Without dead ends: 27853 [2022-03-15 16:18:43,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 54 SyntacticMatches, 19 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9187 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=3027, Invalid=21779, Unknown=0, NotChecked=0, Total=24806 [2022-03-15 16:18:43,848 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 835 mSDsluCounter, 2067 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 1965 SdHoareTripleChecker+Invalid, 2492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1394 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:43,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 1965 Invalid, 2492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 827 Invalid, 0 Unknown, 1394 Unchecked, 0.5s Time] [2022-03-15 16:18:43,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27853 states. [2022-03-15 16:18:44,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27853 to 20365. [2022-03-15 16:18:44,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20365 states, 20364 states have (on average 2.2697407189157337) internal successors, (46221), 20364 states have internal predecessors, (46221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20365 states to 20365 states and 46221 transitions. [2022-03-15 16:18:44,265 INFO L78 Accepts]: Start accepts. Automaton has 20365 states and 46221 transitions. Word has length 36 [2022-03-15 16:18:44,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:44,265 INFO L470 AbstractCegarLoop]: Abstraction has 20365 states and 46221 transitions. [2022-03-15 16:18:44,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:44,265 INFO L276 IsEmpty]: Start isEmpty. Operand 20365 states and 46221 transitions. [2022-03-15 16:18:44,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:18:44,279 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:44,279 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:44,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-03-15 16:18:44,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:44,479 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:44,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:44,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1709950812, now seen corresponding path program 136 times [2022-03-15 16:18:44,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:44,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974426827] [2022-03-15 16:18:44,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:44,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:44,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:44,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974426827] [2022-03-15 16:18:44,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974426827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:44,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808871428] [2022-03-15 16:18:44,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:18:44,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:44,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:44,819 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:44,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-15 16:18:44,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:18:44,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:44,840 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:18:44,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:45,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:45,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:45,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:45,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:45,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:45,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:45,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:45,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:45,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:45,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:45,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:45,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:45,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:45,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:45,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:45,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:45,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:45,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:45,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:45,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:45,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:18:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:45,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:46,371 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:18:46,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:18:47,064 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:47,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808871428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:47,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:47,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-03-15 16:18:47,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621598298] [2022-03-15 16:18:47,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:47,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:18:47,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:47,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:18:47,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1812, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:18:47,065 INFO L87 Difference]: Start difference. First operand 20365 states and 46221 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:50,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:50,808 INFO L93 Difference]: Finished difference Result 26590 states and 59980 transitions. [2022-03-15 16:18:50,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-15 16:18:50,809 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:18:50,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:50,863 INFO L225 Difference]: With dead ends: 26590 [2022-03-15 16:18:50,863 INFO L226 Difference]: Without dead ends: 26551 [2022-03-15 16:18:50,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4675 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1714, Invalid=13786, Unknown=0, NotChecked=0, Total=15500 [2022-03-15 16:18:50,864 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 575 mSDsluCounter, 2939 mSDsCounter, 0 mSdLazyCounter, 1903 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 3006 SdHoareTripleChecker+Invalid, 2932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 876 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:50,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 3006 Invalid, 2932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1903 Invalid, 0 Unknown, 876 Unchecked, 0.9s Time] [2022-03-15 16:18:50,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26551 states. [2022-03-15 16:18:51,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26551 to 20326. [2022-03-15 16:18:51,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20326 states, 20325 states have (on average 2.269520295202952) internal successors, (46128), 20325 states have internal predecessors, (46128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20326 states to 20326 states and 46128 transitions. [2022-03-15 16:18:51,254 INFO L78 Accepts]: Start accepts. Automaton has 20326 states and 46128 transitions. Word has length 36 [2022-03-15 16:18:51,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:51,255 INFO L470 AbstractCegarLoop]: Abstraction has 20326 states and 46128 transitions. [2022-03-15 16:18:51,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:51,255 INFO L276 IsEmpty]: Start isEmpty. Operand 20326 states and 46128 transitions. [2022-03-15 16:18:51,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:18:51,268 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:51,268 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:51,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:51,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:51,469 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:51,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:51,469 INFO L85 PathProgramCache]: Analyzing trace with hash 179518300, now seen corresponding path program 137 times [2022-03-15 16:18:51,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:51,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254550968] [2022-03-15 16:18:51,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:51,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:51,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:51,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:51,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254550968] [2022-03-15 16:18:51,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254550968] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:51,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869030832] [2022-03-15 16:18:51,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:18:51,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:51,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:51,754 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:51,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-15 16:18:51,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:18:51,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:51,777 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:18:51,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:52,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:52,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:52,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:52,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:52,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:52,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:52,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:52,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:52,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:52,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:52,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:52,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:52,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:52,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:52,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:52,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:52,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:52,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:52,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:52,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:18:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:52,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:18:53,274 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:18:53,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:18:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:53,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869030832] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:18:53,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:18:53,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 44 [2022-03-15 16:18:53,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500001542] [2022-03-15 16:18:53,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:18:53,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:18:53,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:18:53,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:18:53,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1724, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:18:53,904 INFO L87 Difference]: Start difference. First operand 20326 states and 46128 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:57,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:18:57,789 INFO L93 Difference]: Finished difference Result 27356 states and 61558 transitions. [2022-03-15 16:18:57,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-15 16:18:57,789 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:18:57,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:18:57,840 INFO L225 Difference]: With dead ends: 27356 [2022-03-15 16:18:57,840 INFO L226 Difference]: Without dead ends: 27087 [2022-03-15 16:18:57,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5021 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1733, Invalid=14017, Unknown=0, NotChecked=0, Total=15750 [2022-03-15 16:18:57,842 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 603 mSDsluCounter, 2672 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 2306 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 504 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:18:57,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 2306 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1723 Invalid, 0 Unknown, 504 Unchecked, 0.8s Time] [2022-03-15 16:18:57,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27087 states. [2022-03-15 16:18:58,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27087 to 20494. [2022-03-15 16:18:58,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20494 states, 20493 states have (on average 2.269457863660762) internal successors, (46508), 20493 states have internal predecessors, (46508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:58,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20494 states to 20494 states and 46508 transitions. [2022-03-15 16:18:58,280 INFO L78 Accepts]: Start accepts. Automaton has 20494 states and 46508 transitions. Word has length 36 [2022-03-15 16:18:58,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:18:58,280 INFO L470 AbstractCegarLoop]: Abstraction has 20494 states and 46508 transitions. [2022-03-15 16:18:58,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:18:58,280 INFO L276 IsEmpty]: Start isEmpty. Operand 20494 states and 46508 transitions. [2022-03-15 16:18:58,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:18:58,293 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:18:58,293 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:18:58,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-03-15 16:18:58,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2022-03-15 16:18:58,493 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:18:58,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:18:58,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1372112940, now seen corresponding path program 138 times [2022-03-15 16:18:58,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:18:58,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140346223] [2022-03-15 16:18:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:18:58,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:18:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:18:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:58,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:18:58,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140346223] [2022-03-15 16:18:58,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140346223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:18:58,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507193176] [2022-03-15 16:18:58,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:18:58,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:18:58,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:18:58,800 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:18:58,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-15 16:18:58,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:18:58,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:18:58,822 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:18:58,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:18:59,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:59,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:59,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:59,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:59,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:59,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:59,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:59,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:59,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:59,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:59,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:59,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:59,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:59,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:18:59,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:59,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:18:59,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:18:59,541 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:18:59,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:00,353 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:19:00,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:19:00,931 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:00,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507193176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:00,932 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:00,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-03-15 16:19:00,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450444449] [2022-03-15 16:19:00,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:00,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:19:00,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:00,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:19:00,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1803, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:19:00,933 INFO L87 Difference]: Start difference. First operand 20494 states and 46508 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:05,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:05,073 INFO L93 Difference]: Finished difference Result 27551 states and 62073 transitions. [2022-03-15 16:19:05,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-03-15 16:19:05,074 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:19:05,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:05,134 INFO L225 Difference]: With dead ends: 27551 [2022-03-15 16:19:05,134 INFO L226 Difference]: Without dead ends: 27469 [2022-03-15 16:19:05,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6266 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2095, Invalid=17365, Unknown=0, NotChecked=0, Total=19460 [2022-03-15 16:19:05,136 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 545 mSDsluCounter, 2336 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 2238 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 401 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:05,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 2238 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1559 Invalid, 0 Unknown, 401 Unchecked, 0.8s Time] [2022-03-15 16:19:05,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27469 states. [2022-03-15 16:19:05,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27469 to 20782. [2022-03-15 16:19:05,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20782 states, 20781 states have (on average 2.2696694095568066) internal successors, (47166), 20781 states have internal predecessors, (47166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:05,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20782 states to 20782 states and 47166 transitions. [2022-03-15 16:19:05,554 INFO L78 Accepts]: Start accepts. Automaton has 20782 states and 47166 transitions. Word has length 36 [2022-03-15 16:19:05,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:05,555 INFO L470 AbstractCegarLoop]: Abstraction has 20782 states and 47166 transitions. [2022-03-15 16:19:05,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:05,555 INFO L276 IsEmpty]: Start isEmpty. Operand 20782 states and 47166 transitions. [2022-03-15 16:19:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:19:05,568 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:05,568 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:05,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:05,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:05,768 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:05,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:05,769 INFO L85 PathProgramCache]: Analyzing trace with hash -730060686, now seen corresponding path program 139 times [2022-03-15 16:19:05,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:05,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523338740] [2022-03-15 16:19:05,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:05,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:06,054 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:06,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:06,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523338740] [2022-03-15 16:19:06,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523338740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:06,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490399515] [2022-03-15 16:19:06,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:19:06,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:06,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:06,055 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:06,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-15 16:19:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:06,076 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:19:06,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:06,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:06,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:06,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:06,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:06,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:06,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:06,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:06,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:06,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:06,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:06,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:06,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:06,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:06,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:06,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:06,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:06,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:19:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:06,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:07,619 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:19:07,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:19:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:08,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490399515] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:08,104 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:08,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 44 [2022-03-15 16:19:08,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761466848] [2022-03-15 16:19:08,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:08,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:19:08,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:08,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:19:08,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1720, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:19:08,105 INFO L87 Difference]: Start difference. First operand 20782 states and 47166 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:12,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:12,225 INFO L93 Difference]: Finished difference Result 26920 states and 60635 transitions. [2022-03-15 16:19:12,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-15 16:19:12,225 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:19:12,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:12,280 INFO L225 Difference]: With dead ends: 26920 [2022-03-15 16:19:12,281 INFO L226 Difference]: Without dead ends: 26688 [2022-03-15 16:19:12,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4677 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1620, Invalid=13142, Unknown=0, NotChecked=0, Total=14762 [2022-03-15 16:19:12,281 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 591 mSDsluCounter, 3260 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 2849 SdHoareTripleChecker+Invalid, 2891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 570 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:12,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 2849 Invalid, 2891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 2183 Invalid, 0 Unknown, 570 Unchecked, 1.0s Time] [2022-03-15 16:19:12,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26688 states. [2022-03-15 16:19:12,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26688 to 20891. [2022-03-15 16:19:12,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20891 states, 20890 states have (on average 2.2693633317376736) internal successors, (47407), 20890 states have internal predecessors, (47407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:12,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20891 states to 20891 states and 47407 transitions. [2022-03-15 16:19:12,692 INFO L78 Accepts]: Start accepts. Automaton has 20891 states and 47407 transitions. Word has length 36 [2022-03-15 16:19:12,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:12,693 INFO L470 AbstractCegarLoop]: Abstraction has 20891 states and 47407 transitions. [2022-03-15 16:19:12,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:12,693 INFO L276 IsEmpty]: Start isEmpty. Operand 20891 states and 47407 transitions. [2022-03-15 16:19:12,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:19:12,706 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:12,706 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:12,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-03-15 16:19:12,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:12,906 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:12,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:12,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2013275370, now seen corresponding path program 140 times [2022-03-15 16:19:12,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:12,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727190546] [2022-03-15 16:19:12,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:12,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:13,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:13,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727190546] [2022-03-15 16:19:13,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727190546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:13,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110881446] [2022-03-15 16:19:13,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:19:13,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:13,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:13,208 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:13,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-15 16:19:13,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:19:13,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:13,229 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:19:13,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:13,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:13,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:13,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:13,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:13,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:13,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:13,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:13,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:13,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:13,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:13,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:13,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:13,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:13,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:13,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:13,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:13,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:13,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:13,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:13,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:19:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:13,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:14,782 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:19:14,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:19:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:15,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110881446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:15,420 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:15,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-03-15 16:19:15,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139624803] [2022-03-15 16:19:15,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:15,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:19:15,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:15,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:19:15,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1804, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:19:15,429 INFO L87 Difference]: Start difference. First operand 20891 states and 47407 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:18,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:18,877 INFO L93 Difference]: Finished difference Result 26637 states and 60068 transitions. [2022-03-15 16:19:18,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-15 16:19:18,877 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:19:18,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:18,931 INFO L225 Difference]: With dead ends: 26637 [2022-03-15 16:19:18,931 INFO L226 Difference]: Without dead ends: 26545 [2022-03-15 16:19:18,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3797 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1432, Invalid=11450, Unknown=0, NotChecked=0, Total=12882 [2022-03-15 16:19:18,933 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 585 mSDsluCounter, 2141 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 2086 SdHoareTripleChecker+Invalid, 1994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:18,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 2086 Invalid, 1994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1394 Invalid, 0 Unknown, 426 Unchecked, 0.7s Time] [2022-03-15 16:19:18,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26545 states. [2022-03-15 16:19:19,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26545 to 20574. [2022-03-15 16:19:19,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20574 states, 20573 states have (on average 2.2679239780294562) internal successors, (46658), 20573 states have internal predecessors, (46658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:19,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20574 states to 20574 states and 46658 transitions. [2022-03-15 16:19:19,433 INFO L78 Accepts]: Start accepts. Automaton has 20574 states and 46658 transitions. Word has length 36 [2022-03-15 16:19:19,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:19,433 INFO L470 AbstractCegarLoop]: Abstraction has 20574 states and 46658 transitions. [2022-03-15 16:19:19,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:19,433 INFO L276 IsEmpty]: Start isEmpty. Operand 20574 states and 46658 transitions. [2022-03-15 16:19:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:19:19,445 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:19,445 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:19,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:19,646 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,SelfDestructingSolverStorable145 [2022-03-15 16:19:19,646 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:19,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:19,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1278751788, now seen corresponding path program 141 times [2022-03-15 16:19:19,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:19,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79014365] [2022-03-15 16:19:19,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:19,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:19,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:19,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79014365] [2022-03-15 16:19:19,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79014365] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:19,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753038686] [2022-03-15 16:19:19,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:19:19,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:19,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:19,988 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:20,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-15 16:19:20,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:19:20,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:20,012 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:19:20,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:20,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:20,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:20,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:20,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:20,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:20,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:20,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:20,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:20,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:20,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:20,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:20,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:20,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:20,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:20,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:20,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:20,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:19:20,726 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:20,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:21,551 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:19:21,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:19:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:22,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753038686] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:22,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:22,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-03-15 16:19:22,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018259496] [2022-03-15 16:19:22,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:22,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:19:22,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:22,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:19:22,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:19:22,223 INFO L87 Difference]: Start difference. First operand 20574 states and 46658 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:25,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:25,032 INFO L93 Difference]: Finished difference Result 25389 states and 57214 transitions. [2022-03-15 16:19:25,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-15 16:19:25,032 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:19:25,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:25,086 INFO L225 Difference]: With dead ends: 25389 [2022-03-15 16:19:25,086 INFO L226 Difference]: Without dead ends: 25350 [2022-03-15 16:19:25,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3121 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1212, Invalid=9500, Unknown=0, NotChecked=0, Total=10712 [2022-03-15 16:19:25,087 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 367 mSDsluCounter, 2944 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 2958 SdHoareTripleChecker+Invalid, 2477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 797 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:25,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 2958 Invalid, 2477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1602 Invalid, 0 Unknown, 797 Unchecked, 0.7s Time] [2022-03-15 16:19:25,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25350 states. [2022-03-15 16:19:25,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25350 to 20487. [2022-03-15 16:19:25,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20487 states, 20486 states have (on average 2.2676461974031046) internal successors, (46455), 20486 states have internal predecessors, (46455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:25,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20487 states to 20487 states and 46455 transitions. [2022-03-15 16:19:25,467 INFO L78 Accepts]: Start accepts. Automaton has 20487 states and 46455 transitions. Word has length 36 [2022-03-15 16:19:25,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:25,467 INFO L470 AbstractCegarLoop]: Abstraction has 20487 states and 46455 transitions. [2022-03-15 16:19:25,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 20487 states and 46455 transitions. [2022-03-15 16:19:25,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:19:25,481 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:25,481 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:25,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:25,682 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,SelfDestructingSolverStorable146 [2022-03-15 16:19:25,683 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:25,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:25,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1622292686, now seen corresponding path program 142 times [2022-03-15 16:19:25,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:25,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449488631] [2022-03-15 16:19:25,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:25,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:25,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:25,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449488631] [2022-03-15 16:19:25,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449488631] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:25,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071308744] [2022-03-15 16:19:25,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:19:25,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:25,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:25,994 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:25,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-15 16:19:26,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:19:26,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:26,016 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:19:26,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:26,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:26,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:26,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:26,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:26,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:26,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:26,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:26,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:26,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:26,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:26,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:26,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:26,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:26,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:26,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:26,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:26,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:26,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:26,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:26,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:26,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:19:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:26,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:27,618 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:19:27,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:19:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:28,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071308744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:28,308 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:28,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-03-15 16:19:28,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536815738] [2022-03-15 16:19:28,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:28,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:19:28,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:28,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:19:28,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1798, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:19:28,309 INFO L87 Difference]: Start difference. First operand 20487 states and 46455 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:31,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:31,986 INFO L93 Difference]: Finished difference Result 26290 states and 59247 transitions. [2022-03-15 16:19:31,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-15 16:19:31,986 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:19:31,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:32,041 INFO L225 Difference]: With dead ends: 26290 [2022-03-15 16:19:32,042 INFO L226 Difference]: Without dead ends: 26156 [2022-03-15 16:19:32,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5078 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1748, Invalid=14254, Unknown=0, NotChecked=0, Total=16002 [2022-03-15 16:19:32,043 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 586 mSDsluCounter, 2479 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 2380 SdHoareTripleChecker+Invalid, 2419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 612 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:32,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 2380 Invalid, 2419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1664 Invalid, 0 Unknown, 612 Unchecked, 0.9s Time] [2022-03-15 16:19:32,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26156 states. [2022-03-15 16:19:32,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26156 to 20294. [2022-03-15 16:19:32,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20294 states, 20293 states have (on average 2.2674813975262404) internal successors, (46014), 20293 states have internal predecessors, (46014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:32,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20294 states to 20294 states and 46014 transitions. [2022-03-15 16:19:32,504 INFO L78 Accepts]: Start accepts. Automaton has 20294 states and 46014 transitions. Word has length 36 [2022-03-15 16:19:32,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:32,504 INFO L470 AbstractCegarLoop]: Abstraction has 20294 states and 46014 transitions. [2022-03-15 16:19:32,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:32,504 INFO L276 IsEmpty]: Start isEmpty. Operand 20294 states and 46014 transitions. [2022-03-15 16:19:32,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:19:32,517 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:32,517 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:32,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-03-15 16:19:32,717 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,SelfDestructingSolverStorable147 [2022-03-15 16:19:32,718 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:32,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:32,718 INFO L85 PathProgramCache]: Analyzing trace with hash -619352548, now seen corresponding path program 143 times [2022-03-15 16:19:32,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:32,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647053790] [2022-03-15 16:19:32,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:32,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:33,020 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:33,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647053790] [2022-03-15 16:19:33,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647053790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:33,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034281101] [2022-03-15 16:19:33,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:19:33,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:33,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:33,021 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:33,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-15 16:19:33,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:19:33,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:33,047 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-15 16:19:33,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:33,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:33,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:33,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:33,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:33,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:33,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:33,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:33,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:33,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:33,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:33,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:33,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:33,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:33,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:33,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:33,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:33,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2022-03-15 16:19:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:33,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:34,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:34,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:19:34,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 208 [2022-03-15 16:19:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:34,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034281101] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:34,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:34,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 16:19:34,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907800150] [2022-03-15 16:19:34,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:34,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-15 16:19:34,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:34,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-15 16:19:34,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1761, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:19:34,894 INFO L87 Difference]: Start difference. First operand 20294 states and 46014 transitions. Second operand has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:40,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:40,677 INFO L93 Difference]: Finished difference Result 25508 states and 57332 transitions. [2022-03-15 16:19:40,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-03-15 16:19:40,678 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:19:40,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:40,724 INFO L225 Difference]: With dead ends: 25508 [2022-03-15 16:19:40,725 INFO L226 Difference]: Without dead ends: 25391 [2022-03-15 16:19:40,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6965 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2397, Invalid=19065, Unknown=0, NotChecked=0, Total=21462 [2022-03-15 16:19:40,726 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 706 mSDsluCounter, 2043 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 2129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:40,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 2003 Invalid, 2129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 1458 Invalid, 0 Unknown, 388 Unchecked, 0.9s Time] [2022-03-15 16:19:40,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25391 states. [2022-03-15 16:19:41,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25391 to 20471. [2022-03-15 16:19:41,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20471 states, 20470 states have (on average 2.267122618466048) internal successors, (46408), 20470 states have internal predecessors, (46408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:41,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20471 states to 20471 states and 46408 transitions. [2022-03-15 16:19:41,115 INFO L78 Accepts]: Start accepts. Automaton has 20471 states and 46408 transitions. Word has length 36 [2022-03-15 16:19:41,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:41,116 INFO L470 AbstractCegarLoop]: Abstraction has 20471 states and 46408 transitions. [2022-03-15 16:19:41,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:41,116 INFO L276 IsEmpty]: Start isEmpty. Operand 20471 states and 46408 transitions. [2022-03-15 16:19:41,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:19:41,128 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:41,129 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:41,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-03-15 16:19:41,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:41,329 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:41,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1383322476, now seen corresponding path program 144 times [2022-03-15 16:19:41,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:41,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417503089] [2022-03-15 16:19:41,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:41,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:41,630 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:41,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417503089] [2022-03-15 16:19:41,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417503089] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:41,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296047424] [2022-03-15 16:19:41,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:19:41,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:41,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:41,631 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:41,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-15 16:19:41,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:19:41,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:41,654 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:19:41,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:42,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:42,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:42,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:42,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:42,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:42,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:42,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:42,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:42,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:42,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:42,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:42,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:42,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:42,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:42,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:42,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:42,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:42,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:42,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:19:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:42,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:43,249 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:19:43,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:19:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:43,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296047424] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:43,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:43,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-03-15 16:19:43,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491379540] [2022-03-15 16:19:43,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:43,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-15 16:19:43,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:43,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-15 16:19:43,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1802, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 16:19:43,699 INFO L87 Difference]: Start difference. First operand 20471 states and 46408 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:46,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:46,288 INFO L93 Difference]: Finished difference Result 25259 states and 56985 transitions. [2022-03-15 16:19:46,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-15 16:19:46,288 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:19:46,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:46,337 INFO L225 Difference]: With dead ends: 25259 [2022-03-15 16:19:46,337 INFO L226 Difference]: Without dead ends: 25219 [2022-03-15 16:19:46,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2914 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1089, Invalid=9213, Unknown=0, NotChecked=0, Total=10302 [2022-03-15 16:19:46,339 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 487 mSDsluCounter, 2583 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 2630 SdHoareTripleChecker+Invalid, 2511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 690 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:46,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 2630 Invalid, 2511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1716 Invalid, 0 Unknown, 690 Unchecked, 0.8s Time] [2022-03-15 16:19:46,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25219 states. [2022-03-15 16:19:46,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25219 to 20375. [2022-03-15 16:19:46,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20375 states, 20374 states have (on average 2.266810641013056) internal successors, (46184), 20374 states have internal predecessors, (46184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20375 states to 20375 states and 46184 transitions. [2022-03-15 16:19:46,745 INFO L78 Accepts]: Start accepts. Automaton has 20375 states and 46184 transitions. Word has length 36 [2022-03-15 16:19:46,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:46,745 INFO L470 AbstractCegarLoop]: Abstraction has 20375 states and 46184 transitions. [2022-03-15 16:19:46,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:46,745 INFO L276 IsEmpty]: Start isEmpty. Operand 20375 states and 46184 transitions. [2022-03-15 16:19:46,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:19:46,757 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:46,757 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:46,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-03-15 16:19:46,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:46,958 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:46,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:46,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1979865158, now seen corresponding path program 145 times [2022-03-15 16:19:46,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:46,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860691395] [2022-03-15 16:19:46,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:46,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:19:47,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:47,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860691395] [2022-03-15 16:19:47,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860691395] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:47,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003493940] [2022-03-15 16:19:47,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:19:47,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:47,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:47,239 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:47,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-15 16:19:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:47,260 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:19:47,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:47,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:47,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:47,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:47,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:47,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:47,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:47,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:47,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:47,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:47,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:47,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:47,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:47,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:47,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:47,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:19:47,917 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:47,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:48,709 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:19:48,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:19:49,403 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:49,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003493940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:49,403 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:49,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 43 [2022-03-15 16:19:49,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320015911] [2022-03-15 16:19:49,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:49,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:19:49,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:49,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:19:49,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1643, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:19:49,404 INFO L87 Difference]: Start difference. First operand 20375 states and 46184 transitions. Second operand has 44 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:52,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:52,896 INFO L93 Difference]: Finished difference Result 24024 states and 53921 transitions. [2022-03-15 16:19:52,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-15 16:19:52,896 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:19:52,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:52,999 INFO L225 Difference]: With dead ends: 24024 [2022-03-15 16:19:52,999 INFO L226 Difference]: Without dead ends: 23524 [2022-03-15 16:19:53,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4572 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1554, Invalid=13208, Unknown=0, NotChecked=0, Total=14762 [2022-03-15 16:19:53,000 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 627 mSDsluCounter, 2771 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 2318 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:53,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 2318 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1498 Invalid, 0 Unknown, 375 Unchecked, 0.7s Time] [2022-03-15 16:19:53,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23524 states. [2022-03-15 16:19:53,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23524 to 20843. [2022-03-15 16:19:53,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20843 states, 20842 states have (on average 2.2691680261011418) internal successors, (47294), 20842 states have internal predecessors, (47294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20843 states to 20843 states and 47294 transitions. [2022-03-15 16:19:53,353 INFO L78 Accepts]: Start accepts. Automaton has 20843 states and 47294 transitions. Word has length 36 [2022-03-15 16:19:53,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:53,353 INFO L470 AbstractCegarLoop]: Abstraction has 20843 states and 47294 transitions. [2022-03-15 16:19:53,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:53,353 INFO L276 IsEmpty]: Start isEmpty. Operand 20843 states and 47294 transitions. [2022-03-15 16:19:53,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:19:53,366 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:53,367 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:53,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-03-15 16:19:53,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:53,567 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:53,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:53,568 INFO L85 PathProgramCache]: Analyzing trace with hash 428233918, now seen corresponding path program 146 times [2022-03-15 16:19:53,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:53,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409289498] [2022-03-15 16:19:53,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:53,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:19:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:53,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:19:53,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409289498] [2022-03-15 16:19:53,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409289498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:19:53,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019266731] [2022-03-15 16:19:53,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:19:53,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:53,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:19:53,873 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:19:53,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-15 16:19:53,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:19:53,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:19:53,894 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:19:53,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:19:54,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:54,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:54,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:54,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:54,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:54,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:54,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:54,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:54,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:54,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:54,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:19:54,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:54,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:54,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:19:54,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:19:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:54,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:19:55,436 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:19:55,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:19:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:19:56,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019266731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:19:56,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:19:56,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-03-15 16:19:56,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390248020] [2022-03-15 16:19:56,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:19:56,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:19:56,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:19:56,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:19:56,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1721, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:19:56,053 INFO L87 Difference]: Start difference. First operand 20843 states and 47294 transitions. Second operand has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:19:59,341 INFO L93 Difference]: Finished difference Result 24497 states and 55164 transitions. [2022-03-15 16:19:59,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-15 16:19:59,341 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:19:59,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:19:59,378 INFO L225 Difference]: With dead ends: 24497 [2022-03-15 16:19:59,378 INFO L226 Difference]: Without dead ends: 24392 [2022-03-15 16:19:59,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4330 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1508, Invalid=12772, Unknown=0, NotChecked=0, Total=14280 [2022-03-15 16:19:59,379 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 453 mSDsluCounter, 2470 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 2312 SdHoareTripleChecker+Invalid, 2078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 360 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:19:59,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 2312 Invalid, 2078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1581 Invalid, 0 Unknown, 360 Unchecked, 0.8s Time] [2022-03-15 16:19:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24392 states. [2022-03-15 16:19:59,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24392 to 20900. [2022-03-15 16:19:59,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20900 states, 20899 states have (on average 2.2687688406143836) internal successors, (47415), 20899 states have internal predecessors, (47415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:59,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20900 states to 20900 states and 47415 transitions. [2022-03-15 16:19:59,725 INFO L78 Accepts]: Start accepts. Automaton has 20900 states and 47415 transitions. Word has length 36 [2022-03-15 16:19:59,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:19:59,726 INFO L470 AbstractCegarLoop]: Abstraction has 20900 states and 47415 transitions. [2022-03-15 16:19:59,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:19:59,726 INFO L276 IsEmpty]: Start isEmpty. Operand 20900 states and 47415 transitions. [2022-03-15 16:19:59,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:19:59,738 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:19:59,738 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:19:59,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-03-15 16:19:59,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:19:59,939 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:19:59,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:19:59,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1783526120, now seen corresponding path program 147 times [2022-03-15 16:19:59,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:19:59,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034628029] [2022-03-15 16:19:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:19:59,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:19:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:20:00,267 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:00,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034628029] [2022-03-15 16:20:00,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034628029] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:00,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278583675] [2022-03-15 16:20:00,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:20:00,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:00,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:00,272 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:00,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-15 16:20:00,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:20:00,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:00,295 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:20:00,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:00,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:00,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:00,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:00,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:20:00,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:00,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:00,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:00,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:00,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:20:00,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:00,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:00,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:00,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:00,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:20:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:00,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:01,783 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:20:01,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:20:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:02,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278583675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:02,723 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:02,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 42 [2022-03-15 16:20:02,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487254045] [2022-03-15 16:20:02,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:02,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:20:02,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:02,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:20:02,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1553, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:20:02,724 INFO L87 Difference]: Start difference. First operand 20900 states and 47415 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:06,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:06,111 INFO L93 Difference]: Finished difference Result 29281 states and 66018 transitions. [2022-03-15 16:20:06,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-15 16:20:06,111 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:20:06,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:06,168 INFO L225 Difference]: With dead ends: 29281 [2022-03-15 16:20:06,168 INFO L226 Difference]: Without dead ends: 28818 [2022-03-15 16:20:06,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3281 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1112, Invalid=9808, Unknown=0, NotChecked=0, Total=10920 [2022-03-15 16:20:06,169 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 789 mSDsluCounter, 3018 mSDsCounter, 0 mSdLazyCounter, 2177 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 2407 SdHoareTripleChecker+Invalid, 2507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 2177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:06,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 2407 Invalid, 2507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 2177 Invalid, 0 Unknown, 122 Unchecked, 1.1s Time] [2022-03-15 16:20:06,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28818 states. [2022-03-15 16:20:06,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28818 to 21266. [2022-03-15 16:20:06,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21266 states, 21265 states have (on average 2.267716905713614) internal successors, (48223), 21265 states have internal predecessors, (48223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:06,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21266 states to 21266 states and 48223 transitions. [2022-03-15 16:20:06,610 INFO L78 Accepts]: Start accepts. Automaton has 21266 states and 48223 transitions. Word has length 36 [2022-03-15 16:20:06,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:06,611 INFO L470 AbstractCegarLoop]: Abstraction has 21266 states and 48223 transitions. [2022-03-15 16:20:06,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:06,611 INFO L276 IsEmpty]: Start isEmpty. Operand 21266 states and 48223 transitions. [2022-03-15 16:20:06,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:20:06,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:06,624 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:06,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-03-15 16:20:06,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:06,824 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:20:06,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:06,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1037469072, now seen corresponding path program 148 times [2022-03-15 16:20:06,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:06,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350361786] [2022-03-15 16:20:06,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:06,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:07,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:07,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350361786] [2022-03-15 16:20:07,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350361786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:07,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505026671] [2022-03-15 16:20:07,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:20:07,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:07,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:07,164 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:07,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-15 16:20:07,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:20:07,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:07,188 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:20:07,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:07,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:07,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:07,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:07,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:07,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:20:07,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:07,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:07,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:07,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:20:07,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:07,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:07,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:07,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:07,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:20:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:07,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:08,659 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:20:08,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:20:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:09,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505026671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:09,326 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:09,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 43 [2022-03-15 16:20:09,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804243135] [2022-03-15 16:20:09,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:09,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:20:09,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:09,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:20:09,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1637, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:20:09,327 INFO L87 Difference]: Start difference. First operand 21266 states and 48223 transitions. Second operand has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:13,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:13,399 INFO L93 Difference]: Finished difference Result 34621 states and 77965 transitions. [2022-03-15 16:20:13,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-15 16:20:13,399 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:20:13,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:13,464 INFO L225 Difference]: With dead ends: 34621 [2022-03-15 16:20:13,464 INFO L226 Difference]: Without dead ends: 34506 [2022-03-15 16:20:13,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5399 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1704, Invalid=14808, Unknown=0, NotChecked=0, Total=16512 [2022-03-15 16:20:13,466 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 624 mSDsluCounter, 2791 mSDsCounter, 0 mSdLazyCounter, 2012 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 2592 SdHoareTripleChecker+Invalid, 2510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:13,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 2592 Invalid, 2510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2012 Invalid, 0 Unknown, 292 Unchecked, 1.0s Time] [2022-03-15 16:20:13,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34506 states. [2022-03-15 16:20:13,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34506 to 20978. [2022-03-15 16:20:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20978 states, 20977 states have (on average 2.2662916527625496) internal successors, (47540), 20977 states have internal predecessors, (47540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:13,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20978 states to 20978 states and 47540 transitions. [2022-03-15 16:20:13,922 INFO L78 Accepts]: Start accepts. Automaton has 20978 states and 47540 transitions. Word has length 36 [2022-03-15 16:20:13,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:13,922 INFO L470 AbstractCegarLoop]: Abstraction has 20978 states and 47540 transitions. [2022-03-15 16:20:13,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:13,922 INFO L276 IsEmpty]: Start isEmpty. Operand 20978 states and 47540 transitions. [2022-03-15 16:20:13,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:20:13,935 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:13,935 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:13,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-03-15 16:20:14,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:14,136 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:20:14,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:14,136 INFO L85 PathProgramCache]: Analyzing trace with hash -481345068, now seen corresponding path program 149 times [2022-03-15 16:20:14,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:14,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760962641] [2022-03-15 16:20:14,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:14,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:14,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:14,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760962641] [2022-03-15 16:20:14,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760962641] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:14,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052810038] [2022-03-15 16:20:14,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:20:14,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:14,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:14,442 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:14,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-15 16:20:14,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:20:14,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:14,464 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:20:14,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:15,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:15,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:15,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:15,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:15,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:15,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:15,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:15,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:15,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:20:15,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:15,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:15,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:15,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:20:15,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:15,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:15,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:20:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:15,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:15,978 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:20:15,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:20:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:16,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052810038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:16,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:16,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-03-15 16:20:16,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609848226] [2022-03-15 16:20:16,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:16,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:20:16,619 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:16,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:20:16,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1718, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:20:16,620 INFO L87 Difference]: Start difference. First operand 20978 states and 47540 transitions. Second operand has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:20,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:20,474 INFO L93 Difference]: Finished difference Result 26034 states and 58649 transitions. [2022-03-15 16:20:20,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-15 16:20:20,474 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:20:20,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:20,522 INFO L225 Difference]: With dead ends: 26034 [2022-03-15 16:20:20,523 INFO L226 Difference]: Without dead ends: 25828 [2022-03-15 16:20:20,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5333 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1953, Invalid=15077, Unknown=0, NotChecked=0, Total=17030 [2022-03-15 16:20:20,524 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 460 mSDsluCounter, 2494 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 2235 SdHoareTripleChecker+Invalid, 2227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 539 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:20,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 2235 Invalid, 2227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1572 Invalid, 0 Unknown, 539 Unchecked, 0.7s Time] [2022-03-15 16:20:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25828 states. [2022-03-15 16:20:20,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25828 to 21068. [2022-03-15 16:20:20,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21068 states, 21067 states have (on average 2.2661508520434803) internal successors, (47741), 21067 states have internal predecessors, (47741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:20,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21068 states to 21068 states and 47741 transitions. [2022-03-15 16:20:20,911 INFO L78 Accepts]: Start accepts. Automaton has 21068 states and 47741 transitions. Word has length 36 [2022-03-15 16:20:20,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:20,911 INFO L470 AbstractCegarLoop]: Abstraction has 21068 states and 47741 transitions. [2022-03-15 16:20:20,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:20,911 INFO L276 IsEmpty]: Start isEmpty. Operand 21068 states and 47741 transitions. [2022-03-15 16:20:20,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:20:20,924 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:20,924 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:20,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-03-15 16:20:21,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:21,124 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:20:21,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:21,125 INFO L85 PathProgramCache]: Analyzing trace with hash 521595070, now seen corresponding path program 150 times [2022-03-15 16:20:21,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:21,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11787838] [2022-03-15 16:20:21,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:21,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:21,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:21,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11787838] [2022-03-15 16:20:21,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11787838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:21,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651172077] [2022-03-15 16:20:21,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:20:21,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:21,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:21,446 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:21,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-15 16:20:21,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:20:21,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:21,469 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:20:21,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:22,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:22,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:22,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:22,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:22,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:22,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:22,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:22,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:22,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:22,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:20:22,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:22,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:22,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:22,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:22,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:22,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:22,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:20:22,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:20:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:22,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:22,934 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:20:22,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:20:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:23,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651172077] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:23,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:23,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-03-15 16:20:23,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328790678] [2022-03-15 16:20:23,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:23,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:20:23,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:23,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:20:23,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1723, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:20:23,495 INFO L87 Difference]: Start difference. First operand 21068 states and 47741 transitions. Second operand has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:25,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:25,978 INFO L93 Difference]: Finished difference Result 25016 states and 56398 transitions. [2022-03-15 16:20:25,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-15 16:20:25,978 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:20:25,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:26,021 INFO L225 Difference]: With dead ends: 25016 [2022-03-15 16:20:26,022 INFO L226 Difference]: Without dead ends: 24977 [2022-03-15 16:20:26,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1225, Invalid=9281, Unknown=0, NotChecked=0, Total=10506 [2022-03-15 16:20:26,022 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 500 mSDsluCounter, 1886 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 1890 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 402 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:26,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 1890 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1194 Invalid, 0 Unknown, 402 Unchecked, 0.6s Time] [2022-03-15 16:20:26,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24977 states. [2022-03-15 16:20:26,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24977 to 21110. [2022-03-15 16:20:26,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21110 states, 21109 states have (on average 2.2660950305556873) internal successors, (47835), 21109 states have internal predecessors, (47835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21110 states to 21110 states and 47835 transitions. [2022-03-15 16:20:26,385 INFO L78 Accepts]: Start accepts. Automaton has 21110 states and 47835 transitions. Word has length 36 [2022-03-15 16:20:26,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:26,385 INFO L470 AbstractCegarLoop]: Abstraction has 21110 states and 47835 transitions. [2022-03-15 16:20:26,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:26,385 INFO L276 IsEmpty]: Start isEmpty. Operand 21110 states and 47835 transitions. [2022-03-15 16:20:26,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:20:26,398 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:26,398 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:26,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-03-15 16:20:26,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-03-15 16:20:26,598 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:20:26,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:26,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1124126880, now seen corresponding path program 151 times [2022-03-15 16:20:26,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:26,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932971276] [2022-03-15 16:20:26,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:26,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:20:26,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:26,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932971276] [2022-03-15 16:20:26,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932971276] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:26,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716523170] [2022-03-15 16:20:26,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:20:26,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:26,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:26,902 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:26,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-15 16:20:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:26,923 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:20:26,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:27,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:27,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:27,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:27,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:27,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:27,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:27,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:20:27,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:27,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:27,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:27,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:27,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:27,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:27,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:20:27,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:27,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:20:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:27,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:28,432 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:20:28,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:20:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:28,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716523170] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:28,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:28,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 42 [2022-03-15 16:20:28,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437642946] [2022-03-15 16:20:28,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:28,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:20:28,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:28,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:20:28,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1556, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:20:28,930 INFO L87 Difference]: Start difference. First operand 21110 states and 47835 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:32,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:32,178 INFO L93 Difference]: Finished difference Result 28330 states and 63763 transitions. [2022-03-15 16:20:32,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-15 16:20:32,178 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:20:32,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:32,232 INFO L225 Difference]: With dead ends: 28330 [2022-03-15 16:20:32,232 INFO L226 Difference]: Without dead ends: 27933 [2022-03-15 16:20:32,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2879 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1084, Invalid=8618, Unknown=0, NotChecked=0, Total=9702 [2022-03-15 16:20:32,233 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 709 mSDsluCounter, 3246 mSDsCounter, 0 mSdLazyCounter, 2347 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 2636 SdHoareTripleChecker+Invalid, 2629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 2347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:32,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 2636 Invalid, 2629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 2347 Invalid, 0 Unknown, 106 Unchecked, 1.1s Time] [2022-03-15 16:20:32,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27933 states. [2022-03-15 16:20:32,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27933 to 21626. [2022-03-15 16:20:32,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21626 states, 21625 states have (on average 2.265757225433526) internal successors, (48997), 21625 states have internal predecessors, (48997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:32,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21626 states to 21626 states and 48997 transitions. [2022-03-15 16:20:32,632 INFO L78 Accepts]: Start accepts. Automaton has 21626 states and 48997 transitions. Word has length 36 [2022-03-15 16:20:32,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:32,633 INFO L470 AbstractCegarLoop]: Abstraction has 21626 states and 48997 transitions. [2022-03-15 16:20:32,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:32,633 INFO L276 IsEmpty]: Start isEmpty. Operand 21626 states and 48997 transitions. [2022-03-15 16:20:32,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:20:32,646 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:32,646 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:32,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-03-15 16:20:32,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-03-15 16:20:32,847 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:20:32,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:32,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1696868312, now seen corresponding path program 152 times [2022-03-15 16:20:32,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:32,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991135211] [2022-03-15 16:20:32,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:32,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:33,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:33,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991135211] [2022-03-15 16:20:33,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991135211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:33,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204836774] [2022-03-15 16:20:33,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:20:33,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:33,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:33,192 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:33,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-15 16:20:33,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:20:33,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:33,213 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:20:33,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:33,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:33,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:33,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:33,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:33,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:33,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:33,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:33,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:33,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:33,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:20:33,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:33,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:20:33,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:33,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:33,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:33,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:20:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:33,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:34,697 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:20:34,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:20:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:35,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204836774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:35,200 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:35,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 43 [2022-03-15 16:20:35,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347898903] [2022-03-15 16:20:35,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:35,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:20:35,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:35,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:20:35,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1636, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:20:35,201 INFO L87 Difference]: Start difference. First operand 21626 states and 48997 transitions. Second operand has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:39,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:39,091 INFO L93 Difference]: Finished difference Result 30717 states and 69125 transitions. [2022-03-15 16:20:39,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-15 16:20:39,091 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:20:39,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:39,157 INFO L225 Difference]: With dead ends: 30717 [2022-03-15 16:20:39,157 INFO L226 Difference]: Without dead ends: 30624 [2022-03-15 16:20:39,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4696 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1448, Invalid=13314, Unknown=0, NotChecked=0, Total=14762 [2022-03-15 16:20:39,159 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 509 mSDsluCounter, 3360 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 3078 SdHoareTripleChecker+Invalid, 2967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:39,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 3078 Invalid, 2967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 2522 Invalid, 0 Unknown, 288 Unchecked, 1.1s Time] [2022-03-15 16:20:39,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30624 states. [2022-03-15 16:20:39,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30624 to 21419. [2022-03-15 16:20:39,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21419 states, 21418 states have (on average 2.265337566532823) internal successors, (48519), 21418 states have internal predecessors, (48519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21419 states to 21419 states and 48519 transitions. [2022-03-15 16:20:39,607 INFO L78 Accepts]: Start accepts. Automaton has 21419 states and 48519 transitions. Word has length 36 [2022-03-15 16:20:39,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:39,607 INFO L470 AbstractCegarLoop]: Abstraction has 21419 states and 48519 transitions. [2022-03-15 16:20:39,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:39,608 INFO L276 IsEmpty]: Start isEmpty. Operand 21419 states and 48519 transitions. [2022-03-15 16:20:39,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:20:39,620 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:39,620 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:39,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-03-15 16:20:39,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:39,821 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:20:39,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:39,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1143483454, now seen corresponding path program 153 times [2022-03-15 16:20:39,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:39,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448695037] [2022-03-15 16:20:39,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:39,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:40,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:40,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448695037] [2022-03-15 16:20:40,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448695037] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:40,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31973939] [2022-03-15 16:20:40,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:20:40,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:40,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:40,115 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:40,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-15 16:20:40,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 16:20:40,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:40,138 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:20:40,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:40,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:40,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:40,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:40,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:40,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:40,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:20:40,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:40,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:40,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:40,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:20:40,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:40,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:40,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:40,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:20:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:40,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:41,638 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:20:41,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:20:42,295 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:42,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31973939] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:42,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:42,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 43 [2022-03-15 16:20:42,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984381504] [2022-03-15 16:20:42,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:42,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 16:20:42,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:42,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 16:20:42,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1633, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:20:42,296 INFO L87 Difference]: Start difference. First operand 21419 states and 48519 transitions. Second operand has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:46,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:46,281 INFO L93 Difference]: Finished difference Result 28109 states and 63107 transitions. [2022-03-15 16:20:46,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-15 16:20:46,282 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:20:46,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:46,341 INFO L225 Difference]: With dead ends: 28109 [2022-03-15 16:20:46,341 INFO L226 Difference]: Without dead ends: 28000 [2022-03-15 16:20:46,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5372 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1786, Invalid=15244, Unknown=0, NotChecked=0, Total=17030 [2022-03-15 16:20:46,343 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 498 mSDsluCounter, 2645 mSDsCounter, 0 mSdLazyCounter, 1828 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 2518 SdHoareTripleChecker+Invalid, 2332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 340 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:46,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 2518 Invalid, 2332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1828 Invalid, 0 Unknown, 340 Unchecked, 0.9s Time] [2022-03-15 16:20:46,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28000 states. [2022-03-15 16:20:46,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28000 to 21581. [2022-03-15 16:20:46,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21581 states, 21580 states have (on average 2.2652455977757184) internal successors, (48884), 21580 states have internal predecessors, (48884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:46,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21581 states to 21581 states and 48884 transitions. [2022-03-15 16:20:46,761 INFO L78 Accepts]: Start accepts. Automaton has 21581 states and 48884 transitions. Word has length 36 [2022-03-15 16:20:46,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:46,761 INFO L470 AbstractCegarLoop]: Abstraction has 21581 states and 48884 transitions. [2022-03-15 16:20:46,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:46,762 INFO L276 IsEmpty]: Start isEmpty. Operand 21581 states and 48884 transitions. [2022-03-15 16:20:46,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:20:46,818 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:46,818 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:46,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-03-15 16:20:47,018 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,SelfDestructingSolverStorable158 [2022-03-15 16:20:47,019 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:20:47,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:47,019 INFO L85 PathProgramCache]: Analyzing trace with hash 178054172, now seen corresponding path program 154 times [2022-03-15 16:20:47,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:47,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169398378] [2022-03-15 16:20:47,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:47,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:47,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:47,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169398378] [2022-03-15 16:20:47,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169398378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:47,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42538196] [2022-03-15 16:20:47,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:20:47,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:47,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:47,327 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:47,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-15 16:20:47,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:20:47,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:47,349 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:20:47,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:48,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:48,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:48,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:48,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:48,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:48,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:20:48,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:48,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:48,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:20:48,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:48,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:48,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:48,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:48,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:20:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:48,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:48,862 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:20:48,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:20:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:49,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42538196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:49,469 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:49,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-03-15 16:20:49,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97354341] [2022-03-15 16:20:49,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:49,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:20:49,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:49,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:20:49,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1716, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:20:49,470 INFO L87 Difference]: Start difference. First operand 21581 states and 48884 transitions. Second operand has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:53,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:53,701 INFO L93 Difference]: Finished difference Result 26772 states and 60190 transitions. [2022-03-15 16:20:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-03-15 16:20:53,701 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:20:53,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:53,755 INFO L225 Difference]: With dead ends: 26772 [2022-03-15 16:20:53,755 INFO L226 Difference]: Without dead ends: 26617 [2022-03-15 16:20:53,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6783 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2138, Invalid=18742, Unknown=0, NotChecked=0, Total=20880 [2022-03-15 16:20:53,757 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 642 mSDsluCounter, 2995 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 2874 SdHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 805 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:53,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 2874 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1721 Invalid, 0 Unknown, 805 Unchecked, 0.8s Time] [2022-03-15 16:20:53,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26617 states. [2022-03-15 16:20:54,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26617 to 21851. [2022-03-15 16:20:54,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21851 states, 21850 states have (on average 2.265354691075515) internal successors, (49498), 21850 states have internal predecessors, (49498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21851 states to 21851 states and 49498 transitions. [2022-03-15 16:20:54,211 INFO L78 Accepts]: Start accepts. Automaton has 21851 states and 49498 transitions. Word has length 36 [2022-03-15 16:20:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:20:54,211 INFO L470 AbstractCegarLoop]: Abstraction has 21851 states and 49498 transitions. [2022-03-15 16:20:54,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:54,211 INFO L276 IsEmpty]: Start isEmpty. Operand 21851 states and 49498 transitions. [2022-03-15 16:20:54,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:20:54,225 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:20:54,225 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:20:54,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-03-15 16:20:54,425 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,SelfDestructingSolverStorable159 [2022-03-15 16:20:54,425 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:20:54,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:20:54,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1180994310, now seen corresponding path program 155 times [2022-03-15 16:20:54,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:20:54,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637016746] [2022-03-15 16:20:54,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:20:54,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:20:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:20:54,732 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:54,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:20:54,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637016746] [2022-03-15 16:20:54,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637016746] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:20:54,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205149064] [2022-03-15 16:20:54,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:20:54,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:20:54,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:20:54,733 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:20:54,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-15 16:20:54,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 16:20:54,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:20:54,755 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:20:54,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:20:55,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:55,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:55,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:55,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:55,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:20:55,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:55,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:55,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:55,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:55,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:20:55,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:55,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:55,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:20:55,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:20:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:55,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:20:56,281 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:20:56,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:20:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:20:56,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205149064] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:20:56,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:20:56,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-03-15 16:20:56,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794639068] [2022-03-15 16:20:56,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:20:56,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:20:56,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:20:56,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:20:56,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1724, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:20:56,927 INFO L87 Difference]: Start difference. First operand 21851 states and 49498 transitions. Second operand has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:20:59,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:20:59,618 INFO L93 Difference]: Finished difference Result 24566 states and 55451 transitions. [2022-03-15 16:20:59,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-15 16:20:59,619 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:20:59,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:20:59,662 INFO L225 Difference]: With dead ends: 24566 [2022-03-15 16:20:59,662 INFO L226 Difference]: Without dead ends: 24527 [2022-03-15 16:20:59,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3693 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1216, Invalid=11216, Unknown=0, NotChecked=0, Total=12432 [2022-03-15 16:20:59,663 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 428 mSDsluCounter, 2037 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 2087 SdHoareTripleChecker+Invalid, 1614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:20:59,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 2087 Invalid, 1614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1149 Invalid, 0 Unknown, 394 Unchecked, 0.5s Time] [2022-03-15 16:20:59,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24527 states. [2022-03-15 16:20:59,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24527 to 21935. [2022-03-15 16:21:00,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21935 states, 21934 states have (on average 2.2653870703018146) internal successors, (49689), 21934 states have internal predecessors, (49689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:00,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21935 states to 21935 states and 49689 transitions. [2022-03-15 16:21:00,054 INFO L78 Accepts]: Start accepts. Automaton has 21935 states and 49689 transitions. Word has length 36 [2022-03-15 16:21:00,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:00,054 INFO L470 AbstractCegarLoop]: Abstraction has 21935 states and 49689 transitions. [2022-03-15 16:21:00,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:00,054 INFO L276 IsEmpty]: Start isEmpty. Operand 21935 states and 49689 transitions. [2022-03-15 16:21:00,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:21:00,068 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:00,068 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:00,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:00,269 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,SelfDestructingSolverStorable160 [2022-03-15 16:21:00,269 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:00,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:00,269 INFO L85 PathProgramCache]: Analyzing trace with hash 417024382, now seen corresponding path program 156 times [2022-03-15 16:21:00,269 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:00,269 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869795874] [2022-03-15 16:21:00,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:00,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:00,622 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:00,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869795874] [2022-03-15 16:21:00,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869795874] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:00,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683947809] [2022-03-15 16:21:00,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:21:00,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:00,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:00,623 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:21:00,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-15 16:21:00,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 16:21:00,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:00,646 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:21:00,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:01,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:01,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:01,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:01,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:01,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:01,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:01,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:01,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:01,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:01,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:01,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:01,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:01,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:01,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:01,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:21:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:01,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:02,152 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:21:02,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:21:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:02,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683947809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:02,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:02,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-03-15 16:21:02,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49364431] [2022-03-15 16:21:02,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:02,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 16:21:02,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:02,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 16:21:02,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1723, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:21:02,863 INFO L87 Difference]: Start difference. First operand 21935 states and 49689 transitions. Second operand has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:05,320 INFO L93 Difference]: Finished difference Result 26267 states and 59189 transitions. [2022-03-15 16:21:05,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-15 16:21:05,320 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:21:05,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:05,369 INFO L225 Difference]: With dead ends: 26267 [2022-03-15 16:21:05,369 INFO L226 Difference]: Without dead ends: 26227 [2022-03-15 16:21:05,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2934 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1066, Invalid=9034, Unknown=0, NotChecked=0, Total=10100 [2022-03-15 16:21:05,370 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 449 mSDsluCounter, 2386 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 2382 SdHoareTripleChecker+Invalid, 2152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 534 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:05,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 2382 Invalid, 2152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1536 Invalid, 0 Unknown, 534 Unchecked, 0.7s Time] [2022-03-15 16:21:05,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26227 states. [2022-03-15 16:21:05,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26227 to 22022. [2022-03-15 16:21:05,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22022 states, 22021 states have (on average 2.2654284546569183) internal successors, (49887), 22021 states have internal predecessors, (49887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:05,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22022 states to 22022 states and 49887 transitions. [2022-03-15 16:21:05,791 INFO L78 Accepts]: Start accepts. Automaton has 22022 states and 49887 transitions. Word has length 36 [2022-03-15 16:21:05,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:05,791 INFO L470 AbstractCegarLoop]: Abstraction has 22022 states and 49887 transitions. [2022-03-15 16:21:05,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:05,791 INFO L276 IsEmpty]: Start isEmpty. Operand 22022 states and 49887 transitions. [2022-03-15 16:21:05,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:21:05,805 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:05,805 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:05,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-03-15 16:21:06,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:06,006 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:06,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:06,006 INFO L85 PathProgramCache]: Analyzing trace with hash 943795958, now seen corresponding path program 157 times [2022-03-15 16:21:06,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:06,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948013097] [2022-03-15 16:21:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:06,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 16:21:06,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:06,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948013097] [2022-03-15 16:21:06,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948013097] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:06,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258051859] [2022-03-15 16:21:06,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:21:06,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:06,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:06,404 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:21:06,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-15 16:21:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:06,425 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:21:06,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:07,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:07,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:07,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:07,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:07,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:07,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:07,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:07,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:07,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:07,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:07,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:07,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:21:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:07,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:07,933 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:21:07,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:21:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:08,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258051859] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:08,537 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:08,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 41 [2022-03-15 16:21:08,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822035489] [2022-03-15 16:21:08,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:08,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 16:21:08,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:08,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 16:21:08,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 16:21:08,538 INFO L87 Difference]: Start difference. First operand 22022 states and 49887 transitions. Second operand has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:11,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:21:11,129 INFO L93 Difference]: Finished difference Result 26976 states and 60750 transitions. [2022-03-15 16:21:11,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-15 16:21:11,130 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 16:21:11,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:21:11,181 INFO L225 Difference]: With dead ends: 26976 [2022-03-15 16:21:11,181 INFO L226 Difference]: Without dead ends: 26617 [2022-03-15 16:21:11,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=825, Invalid=6485, Unknown=0, NotChecked=0, Total=7310 [2022-03-15 16:21:11,182 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 603 mSDsluCounter, 2701 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 2171 SdHoareTripleChecker+Invalid, 2223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:11,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 2171 Invalid, 2223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2061 Invalid, 0 Unknown, 33 Unchecked, 0.9s Time] [2022-03-15 16:21:11,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26617 states. [2022-03-15 16:21:11,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26617 to 22265. [2022-03-15 16:21:11,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22265 states, 22264 states have (on average 2.263474667624865) internal successors, (50394), 22264 states have internal predecessors, (50394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:11,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22265 states to 22265 states and 50394 transitions. [2022-03-15 16:21:11,610 INFO L78 Accepts]: Start accepts. Automaton has 22265 states and 50394 transitions. Word has length 36 [2022-03-15 16:21:11,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:21:11,610 INFO L470 AbstractCegarLoop]: Abstraction has 22265 states and 50394 transitions. [2022-03-15 16:21:11,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:21:11,610 INFO L276 IsEmpty]: Start isEmpty. Operand 22265 states and 50394 transitions. [2022-03-15 16:21:11,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 16:21:11,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:21:11,624 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:21:11,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-03-15 16:21:11,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:11,825 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:21:11,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:21:11,825 INFO L85 PathProgramCache]: Analyzing trace with hash -530176146, now seen corresponding path program 158 times [2022-03-15 16:21:11,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:21:11,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77460770] [2022-03-15 16:21:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:21:11,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:21:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:21:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:12,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:21:12,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77460770] [2022-03-15 16:21:12,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77460770] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:21:12,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509338045] [2022-03-15 16:21:12,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:21:12,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:12,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:21:12,141 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:21:12,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-15 16:21:12,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:21:12,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:21:12,162 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 16:21:12,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:21:12,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:12,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:12,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:12,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:12,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:12,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:12,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:12,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:12,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:12,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:12,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:12,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:21:12,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:21:12,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 33 [2022-03-15 16:21:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:12,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:21:13,650 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 16:21:13,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 94 treesize of output 280 [2022-03-15 16:21:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:21:14,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509338045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:21:14,341 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:21:14,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 42 [2022-03-15 16:21:14,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788767951] [2022-03-15 16:21:14,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:21:14,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-15 16:21:14,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:21:14,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-15 16:21:14,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1566, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:21:14,342 INFO L87 Difference]: Start difference. First operand 22265 states and 50394 transitions. Second operand has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 42 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-03-15 16:21:16,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-15 16:21:16,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2200 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=857, Invalid=6975, Unknown=0, NotChecked=0, Total=7832 [2022-03-15 16:21:16,405 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 322 mSDsluCounter, 1465 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:21:16,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 1523 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 909 Invalid, 0 Unknown, 127 Unchecked, 0.4s Time] [2022-03-15 16:21:16,406 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 16:21:16,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-03-15 16:21:16,435 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:21:16,436 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:21:16,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:21:16,607 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (22265states) and FLOYD_HOARE automaton (currently 77 states, 43 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 89 known predicates. [2022-03-15 16:21:16,608 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 16:21:16,608 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 16:21:16,610 INFO L732 BasicCegarLoop]: Path program histogram: [158, 3, 1, 1, 1] [2022-03-15 16:21:16,612 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 16:21:16,612 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 16:21:16,613 INFO L202 PluginConnector]: Adding new model channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 04:21:16 BasicIcfg [2022-03-15 16:21:16,613 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 16:21:16,621 INFO L158 Benchmark]: Toolchain (without parser) took 760185.34ms. Allocated memory was 225.4MB in the beginning and 1.9GB in the end (delta: 1.7GB). Free memory was 189.5MB in the beginning and 1.6GB in the end (delta: -1.4GB). Peak memory consumption was 318.6MB. Max. memory is 8.0GB. [2022-03-15 16:21:16,621 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 225.4MB. Free memory is still 190.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:21:16,621 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.16ms. Allocated memory is still 225.4MB. Free memory was 189.5MB in the beginning and 188.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-15 16:21:16,621 INFO L158 Benchmark]: Boogie Preprocessor took 9.77ms. Allocated memory is still 225.4MB. Free memory was 188.0MB in the beginning and 187.1MB in the end (delta: 879.0kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:21:16,621 INFO L158 Benchmark]: RCFGBuilder took 162.80ms. Allocated memory is still 225.4MB. Free memory was 187.1MB in the beginning and 177.8MB in the end (delta: 9.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-15 16:21:16,621 INFO L158 Benchmark]: TraceAbstraction took 759992.40ms. Allocated memory was 225.4MB in the beginning and 1.9GB in the end (delta: 1.7GB). Free memory was 177.2MB in the beginning and 1.6GB in the end (delta: -1.4GB). Peak memory consumption was 306.0MB. Max. memory is 8.0GB. [2022-03-15 16:21:16,622 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10ms. Allocated memory is still 225.4MB. Free memory is still 190.7MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 17.16ms. Allocated memory is still 225.4MB. Free memory was 189.5MB in the beginning and 188.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 9.77ms. Allocated memory is still 225.4MB. Free memory was 188.0MB in the beginning and 187.1MB in the end (delta: 879.0kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 162.80ms. Allocated memory is still 225.4MB. Free memory was 187.1MB in the beginning and 177.8MB in the end (delta: 9.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 759992.40ms. Allocated memory was 225.4MB in the beginning and 1.9GB in the end (delta: 1.7GB). Free memory was 177.2MB in the beginning and 1.6GB in the end (delta: -1.4GB). Peak memory consumption was 306.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (22265states) and FLOYD_HOARE automaton (currently 77 states, 43 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 89 known predicates. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (22265states) and FLOYD_HOARE automaton (currently 77 states, 43 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 89 known predicates. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (22265states) and FLOYD_HOARE automaton (currently 77 states, 43 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 89 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 30 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 759.9s, OverallIterations: 164, TraceHistogramMax: 5, PathProgramHistogramMax: 158, EmptinessCheckTime: 1.1s, AutomataDifference: 391.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 68171 SdHoareTripleChecker+Valid, 89.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 68171 mSDsluCounter, 270432 SdHoareTripleChecker+Invalid, 76.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 48274 IncrementalHoareTripleChecker+Unchecked, 289788 mSDsCounter, 18808 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 187955 IncrementalHoareTripleChecker+Invalid, 255037 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18808 mSolverCounterUnsat, 14214 mSDtfsCounter, 187955 mSolverCounterSat, 0.8s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 21523 GetRequests, 6518 SyntacticMatches, 590 SemanticMatches, 14414 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 479381 ImplicationChecksByTransitivity, 400.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22265occurred in iteration=163, InterpolantAutomatonStates: 11701, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 27.3s AutomataMinimizationTime, 163 MinimizatonAttempts, 548118 StatesRemovedByMinimization, 162 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 301.9s InterpolantComputationTime, 10606 NumberOfCodeBlocks, 10606 NumberOfCodeBlocksAsserted, 691 NumberOfCheckSat, 15396 ConstructedInterpolants, 979 QuantifiedInterpolants, 411570 SizeOfPredicates, 1158 NumberOfNonLiveVariables, 12775 ConjunctsInSsa, 6955 ConjunctsInUnsatCore, 484 InterpolantComputations, 4 PerfectInterpolantSequences, 681/20582 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown