/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 19:52:33,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 19:52:33,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 19:52:33,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 19:52:33,255 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-03 19:52:33,270 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 19:52:33,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 19:52:33,271 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 19:52:33,275 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 19:52:33,275 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 19:52:33,276 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 19:52:33,276 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 19:52:33,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 19:52:33,276 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 19:52:33,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 19:52:33,277 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 19:52:33,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 19:52:33,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 19:52:33,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 19:52:33,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 19:52:33,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 19:52:33,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 19:52:33,277 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 19:52:33,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 19:52:33,278 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 19:52:33,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 19:52:33,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 19:52:33,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 19:52:33,278 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 19:52:33,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 19:52:33,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:52:33,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 19:52:33,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 19:52:33,279 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 19:52:33,279 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 19:52:33,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 19:52:33,279 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 19:52:33,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 19:52:33,279 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 19:52:33,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 19:52:33,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 19:52:33,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 19:52:33,463 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 19:52:33,464 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 19:52:33,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl [2022-03-03 19:52:33,466 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl' [2022-03-03 19:52:33,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 19:52:33,485 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 19:52:33,486 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 19:52:33,487 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 19:52:33,487 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 19:52:33,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:52:33" (1/1) ... [2022-03-03 19:52:33,509 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:52:33" (1/1) ... [2022-03-03 19:52:33,513 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 19:52:33,514 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 19:52:33,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 19:52:33,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 19:52:33,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 19:52:33,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:52:33" (1/1) ... [2022-03-03 19:52:33,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:52:33" (1/1) ... [2022-03-03 19:52:33,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:52:33" (1/1) ... [2022-03-03 19:52:33,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:52:33" (1/1) ... [2022-03-03 19:52:33,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:52:33" (1/1) ... [2022-03-03 19:52:33,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:52:33" (1/1) ... [2022-03-03 19:52:33,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:52:33" (1/1) ... [2022-03-03 19:52:33,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 19:52:33,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 19:52:33,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 19:52:33,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 19:52:33,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:52:33" (1/1) ... [2022-03-03 19:52:33,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:52:33,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:33,549 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-03 19:52:33,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-03 19:52:33,592 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 19:52:33,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 19:52:33,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 19:52:33,593 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 19:52:33,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 19:52:33,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 19:52:33,593 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 19:52:33,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 19:52:33,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 19:52:33,593 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 19:52:33,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 19:52:33,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 19:52:33,594 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-03-03 19:52:33,594 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-03-03 19:52:33,594 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-03-03 19:52:33,594 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 19:52:33,628 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 19:52:33,630 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 19:52:33,762 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 19:52:33,780 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 19:52:33,780 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 19:52:33,783 INFO L202 PluginConnector]: Adding new model buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:52:33 BoogieIcfgContainer [2022-03-03 19:52:33,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 19:52:33,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 19:52:33,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 19:52:33,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 19:52:33,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:52:33" (1/2) ... [2022-03-03 19:52:33,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14aa9387 and model type buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 07:52:33, skipping insertion in model container [2022-03-03 19:52:33,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:52:33" (2/2) ... [2022-03-03 19:52:33,792 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series.wvr.bpl [2022-03-03 19:52:33,796 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 19:52:33,796 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 19:52:33,796 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 19:52:33,796 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 19:52:33,845 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-03-03 19:52:33,891 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 19:52:33,905 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 19:52:33,905 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-03-03 19:52:33,912 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2022-03-03 19:52:34,015 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:34,020 INFO L276 IsEmpty]: Start isEmpty. Operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:34,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 19:52:34,050 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:34,051 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:34,051 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:34,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1445873811, now seen corresponding path program 1 times [2022-03-03 19:52:34,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:34,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224685131] [2022-03-03 19:52:34,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:34,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:34,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:34,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:34,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224685131] [2022-03-03 19:52:34,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224685131] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:52:34,161 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:52:34,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-03 19:52:34,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417976311] [2022-03-03 19:52:34,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:52:34,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:52:34,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:34,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:52:34,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:52:34,190 INFO L87 Difference]: Start difference. First operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:34,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:34,260 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2022-03-03 19:52:34,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:52:34,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 19:52:34,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:34,283 INFO L225 Difference]: With dead ends: 1236 [2022-03-03 19:52:34,283 INFO L226 Difference]: Without dead ends: 1109 [2022-03-03 19:52:34,284 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 [2022-03-03 19:52:34,286 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:34,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:52:34,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-03-03 19:52:34,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2022-03-03 19:52:34,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2022-03-03 19:52:34,435 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2022-03-03 19:52:34,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:34,436 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2022-03-03 19:52:34,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:34,436 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2022-03-03 19:52:34,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:52:34,442 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:34,442 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:34,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 19:52:34,443 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:34,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:34,443 INFO L85 PathProgramCache]: Analyzing trace with hash 925045909, now seen corresponding path program 1 times [2022-03-03 19:52:34,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:34,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731247136] [2022-03-03 19:52:34,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:34,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:34,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:34,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731247136] [2022-03-03 19:52:34,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731247136] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:52:34,499 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:52:34,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:52:34,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271476134] [2022-03-03 19:52:34,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:52:34,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:52:34,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:34,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:52:34,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:52:34,501 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2022-03-03 19:52:34,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:34,602 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2022-03-03 19:52:34,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:52:34,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 [2022-03-03 19:52:34,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:34,610 INFO L225 Difference]: With dead ends: 1524 [2022-03-03 19:52:34,611 INFO L226 Difference]: Without dead ends: 1418 [2022-03-03 19:52:34,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:52:34,617 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:34,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 35 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:52:34,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2022-03-03 19:52:34,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2022-03-03 19:52:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:34,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2022-03-03 19:52:34,665 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2022-03-03 19:52:34,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:34,665 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2022-03-03 19:52:34,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2022-03-03 19:52:34,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2022-03-03 19:52:34,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:52:34,669 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:34,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:34,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 19:52:34,670 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:34,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:34,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1282496465, now seen corresponding path program 1 times [2022-03-03 19:52:34,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:34,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473711415] [2022-03-03 19:52:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:34,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:34,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:34,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473711415] [2022-03-03 19:52:34,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473711415] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:52:34,730 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:52:34,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:52:34,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565557513] [2022-03-03 19:52:34,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:52:34,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:52:34,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:34,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:52:34,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:52:34,732 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2022-03-03 19:52:34,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:34,808 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2022-03-03 19:52:34,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:52:34,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 [2022-03-03 19:52:34,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:34,818 INFO L225 Difference]: With dead ends: 2017 [2022-03-03 19:52:34,819 INFO L226 Difference]: Without dead ends: 1875 [2022-03-03 19:52:34,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:52:34,824 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:34,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:52:34,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2022-03-03 19:52:34,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2022-03-03 19:52:34,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:34,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2022-03-03 19:52:34,892 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2022-03-03 19:52:34,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:34,893 INFO L470 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2022-03-03 19:52:34,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2022-03-03 19:52:34,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2022-03-03 19:52:34,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:52:34,898 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:34,898 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:34,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 19:52:34,899 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:34,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:34,900 INFO L85 PathProgramCache]: Analyzing trace with hash 770950601, now seen corresponding path program 1 times [2022-03-03 19:52:34,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:34,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280326116] [2022-03-03 19:52:34,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:34,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:34,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:34,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280326116] [2022-03-03 19:52:34,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280326116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:34,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746175372] [2022-03-03 19:52:34,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:34,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:34,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:34,947 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:34,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 19:52:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:34,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 19:52:34,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:35,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:35,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746175372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:35,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:35,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-03-03 19:52:35,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665872200] [2022-03-03 19:52:35,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:35,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:52:35,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:35,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:52:35,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:52:35,177 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:35,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:35,337 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2022-03-03 19:52:35,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:52:35,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:52:35,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:35,348 INFO L225 Difference]: With dead ends: 2308 [2022-03-03 19:52:35,349 INFO L226 Difference]: Without dead ends: 2108 [2022-03-03 19:52:35,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:52:35,355 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:35,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 54 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:52:35,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2022-03-03 19:52:35,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2022-03-03 19:52:35,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2022-03-03 19:52:35,408 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2022-03-03 19:52:35,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:35,408 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2022-03-03 19:52:35,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:35,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2022-03-03 19:52:35,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:52:35,412 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:35,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:35,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:35,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:35,628 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:35,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:35,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1120776452, now seen corresponding path program 1 times [2022-03-03 19:52:35,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:35,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083071271] [2022-03-03 19:52:35,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:35,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:35,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:35,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083071271] [2022-03-03 19:52:35,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083071271] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:52:35,672 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:52:35,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:52:35,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957188323] [2022-03-03 19:52:35,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:52:35,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:52:35,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:35,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:52:35,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:52:35,673 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:35,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:35,760 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2022-03-03 19:52:35,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:52:35,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:52:35,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:35,770 INFO L225 Difference]: With dead ends: 1950 [2022-03-03 19:52:35,771 INFO L226 Difference]: Without dead ends: 1860 [2022-03-03 19:52:35,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:52:35,771 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 64 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:35,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 17 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:52:35,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2022-03-03 19:52:35,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2022-03-03 19:52:35,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:35,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2022-03-03 19:52:35,826 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2022-03-03 19:52:35,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:35,826 INFO L470 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2022-03-03 19:52:35,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:35,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2022-03-03 19:52:35,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:52:35,830 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:35,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:35,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-03 19:52:35,830 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:35,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:35,831 INFO L85 PathProgramCache]: Analyzing trace with hash 712551812, now seen corresponding path program 2 times [2022-03-03 19:52:35,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:35,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313584122] [2022-03-03 19:52:35,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:35,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:35,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:35,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313584122] [2022-03-03 19:52:35,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313584122] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:52:35,854 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:52:35,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:52:35,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772221218] [2022-03-03 19:52:35,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:52:35,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:52:35,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:35,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:52:35,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:52:35,855 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:35,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:35,914 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2022-03-03 19:52:35,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:52:35,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:52:35,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:35,921 INFO L225 Difference]: With dead ends: 1308 [2022-03-03 19:52:35,921 INFO L226 Difference]: Without dead ends: 1308 [2022-03-03 19:52:35,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:52:35,922 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:35,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 29 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:52:35,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-03-03 19:52:35,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2022-03-03 19:52:35,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:35,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2022-03-03 19:52:35,948 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2022-03-03 19:52:35,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:35,948 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2022-03-03 19:52:35,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:35,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2022-03-03 19:52:35,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:52:35,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:35,951 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:35,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-03 19:52:35,951 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:35,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:35,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1043177095, now seen corresponding path program 2 times [2022-03-03 19:52:35,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:35,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017874063] [2022-03-03 19:52:35,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:35,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:36,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:36,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017874063] [2022-03-03 19:52:36,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017874063] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:52:36,010 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:52:36,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:52:36,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957461750] [2022-03-03 19:52:36,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:52:36,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:52:36,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:36,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:52:36,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:52:36,011 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:36,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:36,058 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2022-03-03 19:52:36,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:52:36,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:52:36,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:36,064 INFO L225 Difference]: With dead ends: 1142 [2022-03-03 19:52:36,064 INFO L226 Difference]: Without dead ends: 1120 [2022-03-03 19:52:36,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:52:36,065 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:36,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:52:36,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-03-03 19:52:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2022-03-03 19:52:36,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:36,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2022-03-03 19:52:36,087 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2022-03-03 19:52:36,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:36,087 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2022-03-03 19:52:36,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:36,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2022-03-03 19:52:36,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:52:36,090 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:36,090 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:36,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-03 19:52:36,090 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:36,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:36,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2066683916, now seen corresponding path program 1 times [2022-03-03 19:52:36,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:36,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427589154] [2022-03-03 19:52:36,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:36,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:52:36,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:36,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427589154] [2022-03-03 19:52:36,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427589154] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:52:36,128 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:52:36,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:52:36,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055484841] [2022-03-03 19:52:36,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:52:36,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:52:36,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:36,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:52:36,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:52:36,129 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:36,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:36,169 INFO L93 Difference]: Finished difference Result 1334 states and 4929 transitions. [2022-03-03 19:52:36,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:52:36,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:52:36,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:36,176 INFO L225 Difference]: With dead ends: 1334 [2022-03-03 19:52:36,176 INFO L226 Difference]: Without dead ends: 1334 [2022-03-03 19:52:36,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:52:36,177 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:36,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 52 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:52:36,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2022-03-03 19:52:36,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 954. [2022-03-03 19:52:36,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.63903462749213) internal successors, (3468), 953 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:36,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3468 transitions. [2022-03-03 19:52:36,202 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3468 transitions. Word has length 27 [2022-03-03 19:52:36,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:36,207 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 3468 transitions. [2022-03-03 19:52:36,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:36,207 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3468 transitions. [2022-03-03 19:52:36,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:52:36,210 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:36,210 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:36,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-03 19:52:36,211 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:36,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:36,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1787495248, now seen corresponding path program 1 times [2022-03-03 19:52:36,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:36,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938661238] [2022-03-03 19:52:36,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:36,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:36,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:36,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938661238] [2022-03-03 19:52:36,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938661238] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:36,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041193913] [2022-03-03 19:52:36,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:36,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:36,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:36,252 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:36,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 19:52:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:36,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-03 19:52:36,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:36,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-03 19:52:36,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041193913] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:52:36,326 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-03 19:52:36,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-03-03 19:52:36,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219396997] [2022-03-03 19:52:36,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:52:36,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:52:36,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:36,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:52:36,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:52:36,328 INFO L87 Difference]: Start difference. First operand 954 states and 3468 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:36,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:36,355 INFO L93 Difference]: Finished difference Result 1658 states and 5999 transitions. [2022-03-03 19:52:36,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:52:36,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:52:36,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:36,373 INFO L225 Difference]: With dead ends: 1658 [2022-03-03 19:52:36,373 INFO L226 Difference]: Without dead ends: 1658 [2022-03-03 19:52:36,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:52:36,376 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 45 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:36,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 40 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:52:36,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2022-03-03 19:52:36,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1112. [2022-03-03 19:52:36,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.667866786678668) internal successors, (4075), 1111 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:36,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 4075 transitions. [2022-03-03 19:52:36,417 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 4075 transitions. Word has length 27 [2022-03-03 19:52:36,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:36,417 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 4075 transitions. [2022-03-03 19:52:36,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:36,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 4075 transitions. [2022-03-03 19:52:36,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:52:36,420 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:36,420 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:36,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-03 19:52:36,636 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,SelfDestructingSolverStorable8 [2022-03-03 19:52:36,636 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:36,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:36,636 INFO L85 PathProgramCache]: Analyzing trace with hash -383422002, now seen corresponding path program 1 times [2022-03-03 19:52:36,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:36,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073778899] [2022-03-03 19:52:36,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:36,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:36,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:36,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073778899] [2022-03-03 19:52:36,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073778899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:36,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258388718] [2022-03-03 19:52:36,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:36,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:36,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:36,808 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:36,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 19:52:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:36,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:52:36,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:36,995 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 17 treesize of output 13 [2022-03-03 19:52:37,026 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 14 treesize of output 10 [2022-03-03 19:52:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:37,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:37,154 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:37,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-03-03 19:52:37,255 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:37,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-03 19:52:37,260 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:37,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-03 19:52:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:37,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258388718] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:37,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:37,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 19:52:37,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474100895] [2022-03-03 19:52:37,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:37,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:52:37,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:37,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:52:37,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:52:37,325 INFO L87 Difference]: Start difference. First operand 1112 states and 4075 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:37,473 INFO L93 Difference]: Finished difference Result 2387 states and 8904 transitions. [2022-03-03 19:52:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:52:37,473 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-03 19:52:37,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:37,481 INFO L225 Difference]: With dead ends: 2387 [2022-03-03 19:52:37,481 INFO L226 Difference]: Without dead ends: 2308 [2022-03-03 19:52:37,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:52:37,481 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 80 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:37,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 144 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:52:37,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2022-03-03 19:52:37,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1550. [2022-03-03 19:52:37,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.7140090380890896) internal successors, (5753), 1549 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5753 transitions. [2022-03-03 19:52:37,538 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5753 transitions. Word has length 29 [2022-03-03 19:52:37,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:37,538 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 5753 transitions. [2022-03-03 19:52:37,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:37,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5753 transitions. [2022-03-03 19:52:37,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:52:37,545 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:37,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:37,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:37,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:37,766 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:37,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:37,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1158240516, now seen corresponding path program 2 times [2022-03-03 19:52:37,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:37,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330488383] [2022-03-03 19:52:37,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:37,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:37,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:37,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330488383] [2022-03-03 19:52:37,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330488383] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:37,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767420354] [2022-03-03 19:52:37,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:52:37,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:37,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:37,862 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:37,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 19:52:37,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:52:37,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:37,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:52:37,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:38,003 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 16 treesize of output 12 [2022-03-03 19:52:38,026 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 14 treesize of output 10 [2022-03-03 19:52:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:38,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:38,155 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:38,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 34 [2022-03-03 19:52:38,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:38,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-03 19:52:38,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:38,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-03 19:52:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:38,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767420354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:38,304 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:38,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 19:52:38,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246113832] [2022-03-03 19:52:38,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:38,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:52:38,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:38,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:52:38,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:52:38,305 INFO L87 Difference]: Start difference. First operand 1550 states and 5753 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:38,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:38,456 INFO L93 Difference]: Finished difference Result 2792 states and 10515 transitions. [2022-03-03 19:52:38,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:52:38,457 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-03 19:52:38,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:38,464 INFO L225 Difference]: With dead ends: 2792 [2022-03-03 19:52:38,465 INFO L226 Difference]: Without dead ends: 2713 [2022-03-03 19:52:38,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:52:38,465 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 90 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:38,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 152 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:52:38,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2022-03-03 19:52:38,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 1749. [2022-03-03 19:52:38,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.7299771167048057) internal successors, (6520), 1748 states have internal predecessors, (6520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:38,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 6520 transitions. [2022-03-03 19:52:38,511 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 6520 transitions. Word has length 29 [2022-03-03 19:52:38,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:38,512 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 6520 transitions. [2022-03-03 19:52:38,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:38,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 6520 transitions. [2022-03-03 19:52:38,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:52:38,516 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:38,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:38,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:38,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:38,731 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:38,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:38,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1824203434, now seen corresponding path program 3 times [2022-03-03 19:52:38,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:38,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213671223] [2022-03-03 19:52:38,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:38,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:38,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:38,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213671223] [2022-03-03 19:52:38,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213671223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:38,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421576853] [2022-03-03 19:52:38,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:52:38,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:38,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:38,831 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:38,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 19:52:38,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:52:38,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:38,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:52:38,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:38,976 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 16 treesize of output 12 [2022-03-03 19:52:39,005 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 19 treesize of output 15 [2022-03-03 19:52:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:39,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:39,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:39,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 34 [2022-03-03 19:52:39,211 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:39,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-03 19:52:39,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:39,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-03 19:52:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:39,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421576853] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:39,263 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:39,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 19:52:39,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468070450] [2022-03-03 19:52:39,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:39,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:52:39,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:39,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:52:39,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:52:39,266 INFO L87 Difference]: Start difference. First operand 1749 states and 6520 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:39,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:39,390 INFO L93 Difference]: Finished difference Result 2570 states and 9639 transitions. [2022-03-03 19:52:39,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:52:39,390 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-03 19:52:39,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:39,398 INFO L225 Difference]: With dead ends: 2570 [2022-03-03 19:52:39,399 INFO L226 Difference]: Without dead ends: 2491 [2022-03-03 19:52:39,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:52:39,400 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 99 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:39,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 135 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:52:39,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2022-03-03 19:52:39,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1887. [2022-03-03 19:52:39,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 3.7338282078472957) internal successors, (7042), 1886 states have internal predecessors, (7042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:39,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 7042 transitions. [2022-03-03 19:52:39,439 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 7042 transitions. Word has length 29 [2022-03-03 19:52:39,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:39,440 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 7042 transitions. [2022-03-03 19:52:39,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:39,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 7042 transitions. [2022-03-03 19:52:39,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:52:39,445 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:39,445 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:39,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:39,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-03 19:52:39,658 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:39,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:39,659 INFO L85 PathProgramCache]: Analyzing trace with hash -614164824, now seen corresponding path program 4 times [2022-03-03 19:52:39,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:39,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749589762] [2022-03-03 19:52:39,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:39,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:39,778 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:39,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749589762] [2022-03-03 19:52:39,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749589762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:39,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767117471] [2022-03-03 19:52:39,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:52:39,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:39,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:39,780 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:39,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 19:52:39,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:52:39,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:39,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:52:39,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:39,918 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 17 treesize of output 13 [2022-03-03 19:52:39,936 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 19 treesize of output 15 [2022-03-03 19:52:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:40,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:40,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:40,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-03-03 19:52:40,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:40,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-03 19:52:40,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:40,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-03-03 19:52:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:40,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767117471] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:40,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:40,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 19:52:40,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444764916] [2022-03-03 19:52:40,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:40,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:52:40,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:40,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:52:40,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:52:40,238 INFO L87 Difference]: Start difference. First operand 1887 states and 7042 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:40,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:40,431 INFO L93 Difference]: Finished difference Result 3006 states and 11331 transitions. [2022-03-03 19:52:40,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:52:40,432 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-03 19:52:40,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:40,441 INFO L225 Difference]: With dead ends: 3006 [2022-03-03 19:52:40,441 INFO L226 Difference]: Without dead ends: 2927 [2022-03-03 19:52:40,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:52:40,442 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 73 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:40,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 154 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:52:40,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2022-03-03 19:52:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 2081. [2022-03-03 19:52:40,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 3.751923076923077) internal successors, (7804), 2080 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:40,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 7804 transitions. [2022-03-03 19:52:40,487 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 7804 transitions. Word has length 29 [2022-03-03 19:52:40,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:40,487 INFO L470 AbstractCegarLoop]: Abstraction has 2081 states and 7804 transitions. [2022-03-03 19:52:40,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:40,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 7804 transitions. [2022-03-03 19:52:40,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:52:40,492 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:40,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:40,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:40,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:40,707 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:40,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:40,708 INFO L85 PathProgramCache]: Analyzing trace with hash -357509362, now seen corresponding path program 5 times [2022-03-03 19:52:40,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:40,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211876589] [2022-03-03 19:52:40,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:40,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:40,800 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:40,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211876589] [2022-03-03 19:52:40,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211876589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:40,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489030104] [2022-03-03 19:52:40,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:52:40,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:40,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:40,801 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:40,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 19:52:40,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:52:40,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:40,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:52:40,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:40,913 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 16 treesize of output 12 [2022-03-03 19:52:40,949 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 18 treesize of output 14 [2022-03-03 19:52:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:41,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:41,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:41,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-03-03 19:52:41,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:41,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-03 19:52:41,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:41,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-03-03 19:52:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:41,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489030104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:41,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:41,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-03 19:52:41,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314605499] [2022-03-03 19:52:41,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:41,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:52:41,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:41,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:52:41,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:52:41,248 INFO L87 Difference]: Start difference. First operand 2081 states and 7804 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:41,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:41,426 INFO L93 Difference]: Finished difference Result 2784 states and 10455 transitions. [2022-03-03 19:52:41,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:52:41,426 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-03 19:52:41,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:41,434 INFO L225 Difference]: With dead ends: 2784 [2022-03-03 19:52:41,434 INFO L226 Difference]: Without dead ends: 2705 [2022-03-03 19:52:41,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:52:41,435 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 79 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:41,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 156 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:52:41,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2022-03-03 19:52:41,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 1882. [2022-03-03 19:52:41,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.741095162147794) internal successors, (7037), 1881 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 7037 transitions. [2022-03-03 19:52:41,477 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 7037 transitions. Word has length 29 [2022-03-03 19:52:41,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:41,477 INFO L470 AbstractCegarLoop]: Abstraction has 1882 states and 7037 transitions. [2022-03-03 19:52:41,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:41,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 7037 transitions. [2022-03-03 19:52:41,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:52:41,481 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:41,481 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:41,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-03 19:52:41,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:41,692 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:41,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:41,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1162136574, now seen corresponding path program 6 times [2022-03-03 19:52:41,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:41,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80044564] [2022-03-03 19:52:41,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:41,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:41,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:41,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:41,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80044564] [2022-03-03 19:52:41,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80044564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:41,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706990258] [2022-03-03 19:52:41,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:52:41,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:41,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:41,818 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:41,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 19:52:41,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:52:41,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:41,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:52:41,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:41,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-03 19:52:41,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-03 19:52:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:42,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:42,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:42,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-03-03 19:52:42,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:42,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-03 19:52:42,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:42,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 35 [2022-03-03 19:52:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:42,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706990258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:42,300 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:42,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-03-03 19:52:42,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334831088] [2022-03-03 19:52:42,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:42,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:52:42,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:42,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:52:42,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:52:42,301 INFO L87 Difference]: Start difference. First operand 1882 states and 7037 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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) [2022-03-03 19:52:42,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:42,501 INFO L93 Difference]: Finished difference Result 2657 states and 9932 transitions. [2022-03-03 19:52:42,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:52:42,502 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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 29 [2022-03-03 19:52:42,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:42,509 INFO L225 Difference]: With dead ends: 2657 [2022-03-03 19:52:42,509 INFO L226 Difference]: Without dead ends: 2578 [2022-03-03 19:52:42,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:52:42,510 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 89 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:42,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 124 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:52:42,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-03-03 19:52:42,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1926. [2022-03-03 19:52:42,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 3.7314285714285713) internal successors, (7183), 1925 states have internal predecessors, (7183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:42,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 7183 transitions. [2022-03-03 19:52:42,548 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 7183 transitions. Word has length 29 [2022-03-03 19:52:42,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:42,548 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 7183 transitions. [2022-03-03 19:52:42,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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) [2022-03-03 19:52:42,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 7183 transitions. [2022-03-03 19:52:42,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 19:52:42,552 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:42,552 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:42,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:42,763 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,SelfDestructingSolverStorable14 [2022-03-03 19:52:42,763 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:42,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:42,764 INFO L85 PathProgramCache]: Analyzing trace with hash 719206604, now seen corresponding path program 7 times [2022-03-03 19:52:42,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:42,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528127533] [2022-03-03 19:52:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:42,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:42,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:42,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528127533] [2022-03-03 19:52:42,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528127533] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:42,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137172519] [2022-03-03 19:52:42,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:52:42,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:42,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:42,795 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:42,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 19:52:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:42,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 19:52:42,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:42,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:42,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137172519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:42,932 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:42,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-03-03 19:52:42,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313807319] [2022-03-03 19:52:42,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:42,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:52:42,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:42,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:52:42,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:52:42,933 INFO L87 Difference]: Start difference. First operand 1926 states and 7183 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:43,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:43,047 INFO L93 Difference]: Finished difference Result 3472 states and 12599 transitions. [2022-03-03 19:52:43,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:52:43,047 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 19:52:43,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:43,057 INFO L225 Difference]: With dead ends: 3472 [2022-03-03 19:52:43,057 INFO L226 Difference]: Without dead ends: 3318 [2022-03-03 19:52:43,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:52:43,057 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:43,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 67 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:52:43,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2022-03-03 19:52:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 2796. [2022-03-03 19:52:43,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 3.759212880143113) internal successors, (10507), 2795 states have internal predecessors, (10507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:43,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 10507 transitions. [2022-03-03 19:52:43,123 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 10507 transitions. Word has length 31 [2022-03-03 19:52:43,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:43,123 INFO L470 AbstractCegarLoop]: Abstraction has 2796 states and 10507 transitions. [2022-03-03 19:52:43,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:43,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 10507 transitions. [2022-03-03 19:52:43,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 19:52:43,129 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:43,129 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:43,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:43,343 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,SelfDestructingSolverStorable15 [2022-03-03 19:52:43,343 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:43,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:43,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1293130992, now seen corresponding path program 8 times [2022-03-03 19:52:43,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:43,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591960193] [2022-03-03 19:52:43,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:43,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:52:43,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:43,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591960193] [2022-03-03 19:52:43,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591960193] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:52:43,364 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:52:43,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 19:52:43,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157671399] [2022-03-03 19:52:43,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:52:43,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:52:43,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:43,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:52:43,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:52:43,365 INFO L87 Difference]: Start difference. First operand 2796 states and 10507 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:43,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:43,420 INFO L93 Difference]: Finished difference Result 5761 states and 21881 transitions. [2022-03-03 19:52:43,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:52:43,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 19:52:43,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:43,434 INFO L225 Difference]: With dead ends: 5761 [2022-03-03 19:52:43,434 INFO L226 Difference]: Without dead ends: 5510 [2022-03-03 19:52:43,435 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 [2022-03-03 19:52:43,435 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 95 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:43,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 52 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:52:43,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5510 states. [2022-03-03 19:52:43,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5510 to 4894. [2022-03-03 19:52:43,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4894 states, 4893 states have (on average 3.8779889638258735) internal successors, (18975), 4893 states have internal predecessors, (18975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:43,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4894 states to 4894 states and 18975 transitions. [2022-03-03 19:52:43,533 INFO L78 Accepts]: Start accepts. Automaton has 4894 states and 18975 transitions. Word has length 31 [2022-03-03 19:52:43,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:43,533 INFO L470 AbstractCegarLoop]: Abstraction has 4894 states and 18975 transitions. [2022-03-03 19:52:43,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:43,533 INFO L276 IsEmpty]: Start isEmpty. Operand 4894 states and 18975 transitions. [2022-03-03 19:52:43,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:52:43,545 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:43,545 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:43,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-03 19:52:43,546 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:43,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:43,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1002043648, now seen corresponding path program 9 times [2022-03-03 19:52:43,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:43,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060142530] [2022-03-03 19:52:43,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:43,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-03 19:52:43,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:43,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060142530] [2022-03-03 19:52:43,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060142530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:43,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095431591] [2022-03-03 19:52:43,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:52:43,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:43,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:43,573 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:43,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 19:52:43,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:52:43,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:43,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:52:43,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-03 19:52:43,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-03 19:52:43,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095431591] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:43,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:43,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-03 19:52:43,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549329638] [2022-03-03 19:52:43,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:43,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:52:43,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:43,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:52:43,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:52:43,788 INFO L87 Difference]: Start difference. First operand 4894 states and 18975 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:44,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:44,151 INFO L93 Difference]: Finished difference Result 17927 states and 66398 transitions. [2022-03-03 19:52:44,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:52:44,151 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 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 34 [2022-03-03 19:52:44,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:44,197 INFO L225 Difference]: With dead ends: 17927 [2022-03-03 19:52:44,197 INFO L226 Difference]: Without dead ends: 15301 [2022-03-03 19:52:44,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:52:44,198 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 168 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:44,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 126 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:52:44,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15301 states. [2022-03-03 19:52:44,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15301 to 8354. [2022-03-03 19:52:44,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8354 states, 8353 states have (on average 3.950676403687298) internal successors, (33000), 8353 states have internal predecessors, (33000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:44,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8354 states to 8354 states and 33000 transitions. [2022-03-03 19:52:44,475 INFO L78 Accepts]: Start accepts. Automaton has 8354 states and 33000 transitions. Word has length 34 [2022-03-03 19:52:44,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:44,476 INFO L470 AbstractCegarLoop]: Abstraction has 8354 states and 33000 transitions. [2022-03-03 19:52:44,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:44,477 INFO L276 IsEmpty]: Start isEmpty. Operand 8354 states and 33000 transitions. [2022-03-03 19:52:44,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:52:44,495 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:44,495 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:44,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:44,703 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,SelfDestructingSolverStorable17 [2022-03-03 19:52:44,703 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:44,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:44,704 INFO L85 PathProgramCache]: Analyzing trace with hash -129967119, now seen corresponding path program 10 times [2022-03-03 19:52:44,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:44,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921864128] [2022-03-03 19:52:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:44,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:44,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:52:44,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:44,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921864128] [2022-03-03 19:52:44,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921864128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:44,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745938180] [2022-03-03 19:52:44,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:52:44,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:44,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:44,777 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:44,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 19:52:44,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:52:44,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:44,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:52:44,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:52:44,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:52:44,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745938180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:44,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:44,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-03 19:52:44,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385501503] [2022-03-03 19:52:44,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:44,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:52:44,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:44,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:52:44,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:52:44,950 INFO L87 Difference]: Start difference. First operand 8354 states and 33000 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:45,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:45,347 INFO L93 Difference]: Finished difference Result 21371 states and 81454 transitions. [2022-03-03 19:52:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:52:45,347 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:52:45,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:45,412 INFO L225 Difference]: With dead ends: 21371 [2022-03-03 19:52:45,412 INFO L226 Difference]: Without dead ends: 20932 [2022-03-03 19:52:45,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:52:45,413 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 331 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:45,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 81 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:52:45,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20932 states. [2022-03-03 19:52:45,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20932 to 12631. [2022-03-03 19:52:45,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12631 states, 12630 states have (on average 4.037925574030087) internal successors, (50999), 12630 states have internal predecessors, (50999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:45,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12631 states to 12631 states and 50999 transitions. [2022-03-03 19:52:45,947 INFO L78 Accepts]: Start accepts. Automaton has 12631 states and 50999 transitions. Word has length 34 [2022-03-03 19:52:45,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:45,947 INFO L470 AbstractCegarLoop]: Abstraction has 12631 states and 50999 transitions. [2022-03-03 19:52:45,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:45,948 INFO L276 IsEmpty]: Start isEmpty. Operand 12631 states and 50999 transitions. [2022-03-03 19:52:46,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:52:46,054 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:46,054 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:46,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:46,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:46,273 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:46,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:46,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1761367056, now seen corresponding path program 11 times [2022-03-03 19:52:46,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:46,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157068179] [2022-03-03 19:52:46,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:46,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:46,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:46,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157068179] [2022-03-03 19:52:46,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157068179] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:46,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703604559] [2022-03-03 19:52:46,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:52:46,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:46,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:46,353 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:46,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 19:52:46,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:52:46,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:46,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:52:46,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:46,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:46,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703604559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:46,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:46,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-03-03 19:52:46,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061765008] [2022-03-03 19:52:46,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:46,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:52:46,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:46,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:52:46,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:52:46,540 INFO L87 Difference]: Start difference. First operand 12631 states and 50999 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:46,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:46,938 INFO L93 Difference]: Finished difference Result 20596 states and 79596 transitions. [2022-03-03 19:52:46,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:52:46,951 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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 34 [2022-03-03 19:52:46,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:47,018 INFO L225 Difference]: With dead ends: 20596 [2022-03-03 19:52:47,018 INFO L226 Difference]: Without dead ends: 20518 [2022-03-03 19:52:47,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:52:47,019 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 169 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:47,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 67 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:52:47,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20518 states. [2022-03-03 19:52:47,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20518 to 12577. [2022-03-03 19:52:47,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12577 states, 12576 states have (on average 4.042064249363868) internal successors, (50833), 12576 states have internal predecessors, (50833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:47,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12577 states to 12577 states and 50833 transitions. [2022-03-03 19:52:47,460 INFO L78 Accepts]: Start accepts. Automaton has 12577 states and 50833 transitions. Word has length 34 [2022-03-03 19:52:47,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:47,460 INFO L470 AbstractCegarLoop]: Abstraction has 12577 states and 50833 transitions. [2022-03-03 19:52:47,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:47,461 INFO L276 IsEmpty]: Start isEmpty. Operand 12577 states and 50833 transitions. [2022-03-03 19:52:47,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:52:47,605 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:47,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:47,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-03 19:52:47,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:47,807 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:47,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:47,808 INFO L85 PathProgramCache]: Analyzing trace with hash -447820591, now seen corresponding path program 12 times [2022-03-03 19:52:47,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:47,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661012016] [2022-03-03 19:52:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:47,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:47,838 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:47,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661012016] [2022-03-03 19:52:47,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661012016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:47,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739878110] [2022-03-03 19:52:47,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:52:47,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:47,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:47,839 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:47,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 19:52:47,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:52:47,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:47,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:52:47,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:48,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:48,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:48,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739878110] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:48,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:48,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-03-03 19:52:48,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466984537] [2022-03-03 19:52:48,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:48,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:52:48,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:48,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:52:48,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:52:48,099 INFO L87 Difference]: Start difference. First operand 12577 states and 50833 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:48,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:48,467 INFO L93 Difference]: Finished difference Result 22733 states and 87606 transitions. [2022-03-03 19:52:48,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:52:48,467 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 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 34 [2022-03-03 19:52:48,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:48,531 INFO L225 Difference]: With dead ends: 22733 [2022-03-03 19:52:48,531 INFO L226 Difference]: Without dead ends: 21028 [2022-03-03 19:52:48,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:52:48,532 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 243 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:48,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 88 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:52:48,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21028 states. [2022-03-03 19:52:48,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21028 to 15386. [2022-03-03 19:52:49,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15386 states, 15385 states have (on average 4.0534936626584335) internal successors, (62363), 15385 states have internal predecessors, (62363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:49,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15386 states to 15386 states and 62363 transitions. [2022-03-03 19:52:49,073 INFO L78 Accepts]: Start accepts. Automaton has 15386 states and 62363 transitions. Word has length 34 [2022-03-03 19:52:49,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:49,073 INFO L470 AbstractCegarLoop]: Abstraction has 15386 states and 62363 transitions. [2022-03-03 19:52:49,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:49,073 INFO L276 IsEmpty]: Start isEmpty. Operand 15386 states and 62363 transitions. [2022-03-03 19:52:49,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:52:49,111 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:49,111 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:49,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:49,312 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,SelfDestructingSolverStorable20 [2022-03-03 19:52:49,313 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:49,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:49,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1932805376, now seen corresponding path program 13 times [2022-03-03 19:52:49,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:49,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482746620] [2022-03-03 19:52:49,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:49,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:49,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:49,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482746620] [2022-03-03 19:52:49,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482746620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:49,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254756965] [2022-03-03 19:52:49,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:52:49,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:49,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:49,354 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:49,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 19:52:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:49,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:52:49,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:49,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:49,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254756965] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:49,532 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:49,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-03-03 19:52:49,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829188662] [2022-03-03 19:52:49,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:49,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:52:49,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:49,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:52:49,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:52:49,534 INFO L87 Difference]: Start difference. First operand 15386 states and 62363 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:50,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:50,106 INFO L93 Difference]: Finished difference Result 31402 states and 124083 transitions. [2022-03-03 19:52:50,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:52:50,106 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:52:50,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:50,216 INFO L225 Difference]: With dead ends: 31402 [2022-03-03 19:52:50,217 INFO L226 Difference]: Without dead ends: 31094 [2022-03-03 19:52:50,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:52:50,217 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 349 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:50,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 79 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:52:50,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31094 states. [2022-03-03 19:52:50,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31094 to 19812. [2022-03-03 19:52:50,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19812 states, 19811 states have (on average 4.119024784210792) internal successors, (81602), 19811 states have internal predecessors, (81602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:50,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19812 states to 19812 states and 81602 transitions. [2022-03-03 19:52:50,952 INFO L78 Accepts]: Start accepts. Automaton has 19812 states and 81602 transitions. Word has length 34 [2022-03-03 19:52:50,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:50,953 INFO L470 AbstractCegarLoop]: Abstraction has 19812 states and 81602 transitions. [2022-03-03 19:52:50,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:50,953 INFO L276 IsEmpty]: Start isEmpty. Operand 19812 states and 81602 transitions. [2022-03-03 19:52:50,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:52:50,994 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:50,994 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:51,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:51,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:51,202 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:51,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:51,202 INFO L85 PathProgramCache]: Analyzing trace with hash 19813248, now seen corresponding path program 14 times [2022-03-03 19:52:51,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:51,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893350572] [2022-03-03 19:52:51,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:51,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:52:51,228 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:51,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893350572] [2022-03-03 19:52:51,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893350572] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:51,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551423205] [2022-03-03 19:52:51,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:52:51,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:51,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:51,230 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:51,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 19:52:51,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:52:51,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:51,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:52:51,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:51,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:52:51,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551423205] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:51,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:51,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-03-03 19:52:51,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280358851] [2022-03-03 19:52:51,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:51,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:52:51,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:51,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:52:51,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:52:51,418 INFO L87 Difference]: Start difference. First operand 19812 states and 81602 transitions. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:51,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:51,992 INFO L93 Difference]: Finished difference Result 33709 states and 133959 transitions. [2022-03-03 19:52:51,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:52:51,993 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:52:51,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:52,114 INFO L225 Difference]: With dead ends: 33709 [2022-03-03 19:52:52,114 INFO L226 Difference]: Without dead ends: 32656 [2022-03-03 19:52:52,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:52:52,115 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 170 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:52,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 112 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:52:52,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32656 states. [2022-03-03 19:52:52,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32656 to 23355. [2022-03-03 19:52:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23355 states, 23354 states have (on average 4.114370129314036) internal successors, (96087), 23354 states have internal predecessors, (96087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:52,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23355 states to 23355 states and 96087 transitions. [2022-03-03 19:52:52,911 INFO L78 Accepts]: Start accepts. Automaton has 23355 states and 96087 transitions. Word has length 34 [2022-03-03 19:52:52,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:52,911 INFO L470 AbstractCegarLoop]: Abstraction has 23355 states and 96087 transitions. [2022-03-03 19:52:52,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:52,911 INFO L276 IsEmpty]: Start isEmpty. Operand 23355 states and 96087 transitions. [2022-03-03 19:52:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:52:52,962 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:52,962 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:52,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:53,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:53,179 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:53,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:53,179 INFO L85 PathProgramCache]: Analyzing trace with hash -650007193, now seen corresponding path program 15 times [2022-03-03 19:52:53,179 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:53,179 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265668861] [2022-03-03 19:52:53,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:53,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:52:53,205 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:53,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265668861] [2022-03-03 19:52:53,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265668861] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:53,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452680786] [2022-03-03 19:52:53,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:52:53,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:53,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:53,206 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:53,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 19:52:53,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:52:53,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:53,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:52:53,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:52:53,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:52:53,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452680786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:53,360 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:53,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-03-03 19:52:53,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773662605] [2022-03-03 19:52:53,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:53,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:52:53,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:53,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:52:53,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:52:53,361 INFO L87 Difference]: Start difference. First operand 23355 states and 96087 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:53,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:53,908 INFO L93 Difference]: Finished difference Result 31214 states and 125510 transitions. [2022-03-03 19:52:53,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:52:53,912 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 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 34 [2022-03-03 19:52:53,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:54,014 INFO L225 Difference]: With dead ends: 31214 [2022-03-03 19:52:54,014 INFO L226 Difference]: Without dead ends: 31106 [2022-03-03 19:52:54,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:52:54,015 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 149 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:54,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 81 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:52:54,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31106 states. [2022-03-03 19:52:54,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31106 to 24543. [2022-03-03 19:52:54,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24543 states, 24542 states have (on average 4.135033819574606) internal successors, (101482), 24542 states have internal predecessors, (101482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:54,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24543 states to 24543 states and 101482 transitions. [2022-03-03 19:52:54,880 INFO L78 Accepts]: Start accepts. Automaton has 24543 states and 101482 transitions. Word has length 34 [2022-03-03 19:52:54,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:54,880 INFO L470 AbstractCegarLoop]: Abstraction has 24543 states and 101482 transitions. [2022-03-03 19:52:54,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:54,881 INFO L276 IsEmpty]: Start isEmpty. Operand 24543 states and 101482 transitions. [2022-03-03 19:52:54,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:52:54,930 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:54,930 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:54,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:55,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-03 19:52:55,131 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:55,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:55,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2144646697, now seen corresponding path program 16 times [2022-03-03 19:52:55,131 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:55,131 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217025110] [2022-03-03 19:52:55,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:55,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-03 19:52:55,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:55,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217025110] [2022-03-03 19:52:55,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217025110] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:55,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769908781] [2022-03-03 19:52:55,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:52:55,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:55,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:55,157 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:55,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 19:52:55,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:52:55,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:55,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:52:55,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-03 19:52:55,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-03 19:52:55,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769908781] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:52:55,232 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-03 19:52:55,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-03-03 19:52:55,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732374747] [2022-03-03 19:52:55,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:52:55,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:52:55,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:55,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:52:55,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:52:55,233 INFO L87 Difference]: Start difference. First operand 24543 states and 101482 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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) [2022-03-03 19:52:55,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:55,567 INFO L93 Difference]: Finished difference Result 29524 states and 121533 transitions. [2022-03-03 19:52:55,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:52:55,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 37 [2022-03-03 19:52:55,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:55,673 INFO L225 Difference]: With dead ends: 29524 [2022-03-03 19:52:55,673 INFO L226 Difference]: Without dead ends: 29524 [2022-03-03 19:52:55,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:52:55,674 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:55,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:52:55,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29524 states. [2022-03-03 19:52:56,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29524 to 22120. [2022-03-03 19:52:56,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22120 states, 22119 states have (on average 4.096252090962521) internal successors, (90605), 22119 states have internal predecessors, (90605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:56,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22120 states to 22120 states and 90605 transitions. [2022-03-03 19:52:56,227 INFO L78 Accepts]: Start accepts. Automaton has 22120 states and 90605 transitions. Word has length 37 [2022-03-03 19:52:56,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:56,227 INFO L470 AbstractCegarLoop]: Abstraction has 22120 states and 90605 transitions. [2022-03-03 19:52:56,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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) [2022-03-03 19:52:56,227 INFO L276 IsEmpty]: Start isEmpty. Operand 22120 states and 90605 transitions. [2022-03-03 19:52:56,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:52:56,272 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:56,272 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:56,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:56,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:56,472 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:56,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:56,473 INFO L85 PathProgramCache]: Analyzing trace with hash -461619199, now seen corresponding path program 17 times [2022-03-03 19:52:56,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:56,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513095840] [2022-03-03 19:52:56,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:56,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-03 19:52:56,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:56,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513095840] [2022-03-03 19:52:56,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513095840] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:56,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803891996] [2022-03-03 19:52:56,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:52:56,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:56,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:56,505 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:56,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 19:52:56,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:52:56,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:56,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:52:56,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-03 19:52:56,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-03 19:52:56,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803891996] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:52:56,587 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-03 19:52:56,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-03-03 19:52:56,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009268272] [2022-03-03 19:52:56,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:52:56,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:52:56,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:56,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:52:56,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:52:56,588 INFO L87 Difference]: Start difference. First operand 22120 states and 90605 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:56,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:56,990 INFO L93 Difference]: Finished difference Result 30000 states and 123549 transitions. [2022-03-03 19:52:56,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:52:56,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:52:56,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:57,099 INFO L225 Difference]: With dead ends: 30000 [2022-03-03 19:52:57,100 INFO L226 Difference]: Without dead ends: 30000 [2022-03-03 19:52:57,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:52:57,101 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:57,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 68 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:52:57,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30000 states. [2022-03-03 19:52:57,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30000 to 24376. [2022-03-03 19:52:57,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24376 states, 24375 states have (on average 4.091979487179487) internal successors, (99742), 24375 states have internal predecessors, (99742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:57,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24376 states to 24376 states and 99742 transitions. [2022-03-03 19:52:57,869 INFO L78 Accepts]: Start accepts. Automaton has 24376 states and 99742 transitions. Word has length 37 [2022-03-03 19:52:57,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:57,869 INFO L470 AbstractCegarLoop]: Abstraction has 24376 states and 99742 transitions. [2022-03-03 19:52:57,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:57,869 INFO L276 IsEmpty]: Start isEmpty. Operand 24376 states and 99742 transitions. [2022-03-03 19:52:57,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:52:57,919 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:57,919 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:57,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:58,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:58,120 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:52:58,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:58,120 INFO L85 PathProgramCache]: Analyzing trace with hash -857424067, now seen corresponding path program 18 times [2022-03-03 19:52:58,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:58,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193089488] [2022-03-03 19:52:58,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:58,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:58,139 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-03 19:52:58,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:58,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193089488] [2022-03-03 19:52:58,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193089488] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:58,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937922509] [2022-03-03 19:52:58,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:52:58,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:58,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:58,140 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:58,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 19:52:58,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:52:58,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:58,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:52:58,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-03 19:52:58,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-03 19:52:58,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937922509] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:58,261 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:58,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-03-03 19:52:58,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560023474] [2022-03-03 19:52:58,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:58,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:52:58,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:58,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:52:58,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:52:58,262 INFO L87 Difference]: Start difference. First operand 24376 states and 99742 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:58,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:58,683 INFO L93 Difference]: Finished difference Result 37294 states and 154370 transitions. [2022-03-03 19:52:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:52:58,683 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:52:58,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:58,827 INFO L225 Difference]: With dead ends: 37294 [2022-03-03 19:52:58,828 INFO L226 Difference]: Without dead ends: 37294 [2022-03-03 19:52:58,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:52:58,828 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 72 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:58,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 81 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:52:58,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37294 states. [2022-03-03 19:52:59,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37294 to 34517. [2022-03-03 19:52:59,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34517 states, 34516 states have (on average 4.136226677482907) internal successors, (142766), 34516 states have internal predecessors, (142766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:59,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34517 states to 34517 states and 142766 transitions. [2022-03-03 19:52:59,894 INFO L78 Accepts]: Start accepts. Automaton has 34517 states and 142766 transitions. Word has length 37 [2022-03-03 19:52:59,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:59,895 INFO L470 AbstractCegarLoop]: Abstraction has 34517 states and 142766 transitions. [2022-03-03 19:52:59,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:59,895 INFO L276 IsEmpty]: Start isEmpty. Operand 34517 states and 142766 transitions. [2022-03-03 19:52:59,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:52:59,974 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:59,974 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:59,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 19:53:00,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:00,177 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:53:00,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:00,177 INFO L85 PathProgramCache]: Analyzing trace with hash -709164033, now seen corresponding path program 19 times [2022-03-03 19:53:00,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:00,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685201259] [2022-03-03 19:53:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:00,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:00,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:00,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685201259] [2022-03-03 19:53:00,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685201259] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:00,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768996476] [2022-03-03 19:53:00,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:53:00,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:00,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:00,566 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:53:00,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 19:53:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:00,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:53:00,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:00,851 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:53:00,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-03-03 19:53:01,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-03 19:53:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:01,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:01,422 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:01,423 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 36 treesize of output 60 [2022-03-03 19:53:01,740 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:01,741 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 45 treesize of output 69 [2022-03-03 19:53:01,770 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:01,770 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 67 treesize of output 85 [2022-03-03 19:53:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:02,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768996476] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:02,192 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:02,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-03-03 19:53:02,193 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794101035] [2022-03-03 19:53:02,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:02,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:53:02,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:02,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:53:02,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:53:02,194 INFO L87 Difference]: Start difference. First operand 34517 states and 142766 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:04,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:04,571 INFO L93 Difference]: Finished difference Result 67293 states and 275148 transitions. [2022-03-03 19:53:04,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:53:04,571 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:53:04,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:04,869 INFO L225 Difference]: With dead ends: 67293 [2022-03-03 19:53:04,869 INFO L226 Difference]: Without dead ends: 67101 [2022-03-03 19:53:04,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=334, Invalid=2318, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:53:04,870 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 579 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 2877 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 2953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:04,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 472 Invalid, 2953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2877 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:53:04,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67101 states. [2022-03-03 19:53:06,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67101 to 34913. [2022-03-03 19:53:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34913 states, 34912 states have (on average 4.134910632447296) internal successors, (144358), 34912 states have internal predecessors, (144358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:06,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34913 states to 34913 states and 144358 transitions. [2022-03-03 19:53:06,564 INFO L78 Accepts]: Start accepts. Automaton has 34913 states and 144358 transitions. Word has length 39 [2022-03-03 19:53:06,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:06,564 INFO L470 AbstractCegarLoop]: Abstraction has 34913 states and 144358 transitions. [2022-03-03 19:53:06,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:06,565 INFO L276 IsEmpty]: Start isEmpty. Operand 34913 states and 144358 transitions. [2022-03-03 19:53:06,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:53:06,699 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:06,699 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:06,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-03 19:53:06,900 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,SelfDestructingSolverStorable27 [2022-03-03 19:53:06,900 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:53:06,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:06,901 INFO L85 PathProgramCache]: Analyzing trace with hash -943081597, now seen corresponding path program 20 times [2022-03-03 19:53:06,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:06,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775765549] [2022-03-03 19:53:06,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:06,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:07,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:07,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775765549] [2022-03-03 19:53:07,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775765549] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:07,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432253226] [2022-03-03 19:53:07,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:53:07,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:07,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:07,338 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:53:07,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 19:53:07,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:53:07,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:07,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:53:07,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:07,638 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:53:07,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2022-03-03 19:53:07,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-03-03 19:53:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:07,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:08,106 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:08,107 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 36 treesize of output 60 [2022-03-03 19:53:08,404 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:08,404 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 45 treesize of output 69 [2022-03-03 19:53:08,436 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:53:08,436 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 67 treesize of output 85 [2022-03-03 19:53:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:09,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432253226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:09,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:09,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-03-03 19:53:09,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363761138] [2022-03-03 19:53:09,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:09,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:53:09,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:09,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:53:09,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:53:09,050 INFO L87 Difference]: Start difference. First operand 34913 states and 144358 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:11,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:11,885 INFO L93 Difference]: Finished difference Result 73959 states and 303171 transitions. [2022-03-03 19:53:11,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-03 19:53:11,885 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:53:11,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:12,371 INFO L225 Difference]: With dead ends: 73959 [2022-03-03 19:53:12,371 INFO L226 Difference]: Without dead ends: 73743 [2022-03-03 19:53:12,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=435, Invalid=2987, Unknown=0, NotChecked=0, Total=3422 [2022-03-03 19:53:12,372 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 629 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 3594 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 3688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:12,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 691 Invalid, 3688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3594 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 19:53:12,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73743 states. [2022-03-03 19:53:13,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73743 to 35063. [2022-03-03 19:53:13,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35063 states, 35062 states have (on average 4.133534881067822) internal successors, (144930), 35062 states have internal predecessors, (144930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:13,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35063 states to 35063 states and 144930 transitions. [2022-03-03 19:53:13,738 INFO L78 Accepts]: Start accepts. Automaton has 35063 states and 144930 transitions. Word has length 39 [2022-03-03 19:53:13,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:13,738 INFO L470 AbstractCegarLoop]: Abstraction has 35063 states and 144930 transitions. [2022-03-03 19:53:13,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:13,738 INFO L276 IsEmpty]: Start isEmpty. Operand 35063 states and 144930 transitions. [2022-03-03 19:53:13,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:53:13,819 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:13,819 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:13,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 19:53:14,020 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,SelfDestructingSolverStorable28 [2022-03-03 19:53:14,020 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:53:14,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:14,020 INFO L85 PathProgramCache]: Analyzing trace with hash 868774019, now seen corresponding path program 21 times [2022-03-03 19:53:14,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:14,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869713708] [2022-03-03 19:53:14,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:14,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:14,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:14,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869713708] [2022-03-03 19:53:14,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869713708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:14,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546538570] [2022-03-03 19:53:14,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:53:14,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:14,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:14,596 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:53:14,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 19:53:14,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:53:14,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:53:14,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-03 19:53:14,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:14,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:14,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:14,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2022-03-03 19:53:15,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:15,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 36 [2022-03-03 19:53:15,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:15,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:15,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 47 [2022-03-03 19:53:15,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:15,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:16,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:16,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:16,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:16,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:16,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 47 [2022-03-03 19:53:21,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:21,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:21,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:21,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:21,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 102 [2022-03-03 19:53:21,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:21,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:21,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:53:21,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 110 treesize of output 112 [2022-03-03 19:53:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:22,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546538570] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:22,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:22,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 45 [2022-03-03 19:53:22,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527677187] [2022-03-03 19:53:22,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:22,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:53:22,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:22,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:53:22,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:53:22,901 INFO L87 Difference]: Start difference. First operand 35063 states and 144930 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:17,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:17,864 INFO L93 Difference]: Finished difference Result 85082 states and 341640 transitions. [2022-03-03 19:54:17,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2022-03-03 19:54:17,864 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:54:17,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:18,256 INFO L225 Difference]: With dead ends: 85082 [2022-03-03 19:54:18,256 INFO L226 Difference]: Without dead ends: 85008 [2022-03-03 19:54:18,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 67 SyntacticMatches, 32 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18771 ImplicationChecksByTransitivity, 53.3s TimeCoverageRelationStatistics Valid=5360, Invalid=36034, Unknown=18, NotChecked=0, Total=41412 [2022-03-03 19:54:18,265 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1446 mSDsluCounter, 4881 mSDsCounter, 0 mSdLazyCounter, 2765 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1446 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 15425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 2765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12403 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:18,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1446 Valid, 1281 Invalid, 15425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 2765 Invalid, 0 Unknown, 12403 Unchecked, 1.5s Time] [2022-03-03 19:54:18,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85008 states. [2022-03-03 19:54:19,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85008 to 36789. [2022-03-03 19:54:19,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36789 states, 36788 states have (on average 4.1157442644340545) internal successors, (151410), 36788 states have internal predecessors, (151410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:19,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36789 states to 36789 states and 151410 transitions. [2022-03-03 19:54:19,865 INFO L78 Accepts]: Start accepts. Automaton has 36789 states and 151410 transitions. Word has length 39 [2022-03-03 19:54:19,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:19,865 INFO L470 AbstractCegarLoop]: Abstraction has 36789 states and 151410 transitions. [2022-03-03 19:54:19,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:19,866 INFO L276 IsEmpty]: Start isEmpty. Operand 36789 states and 151410 transitions. [2022-03-03 19:54:19,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:54:19,956 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:19,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:19,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-03 19:54:20,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:20,157 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:54:20,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:20,157 INFO L85 PathProgramCache]: Analyzing trace with hash -813062891, now seen corresponding path program 22 times [2022-03-03 19:54:20,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:20,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542153938] [2022-03-03 19:54:20,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:20,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:20,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:20,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542153938] [2022-03-03 19:54:20,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542153938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:20,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221856511] [2022-03-03 19:54:20,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:54:20,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:20,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:20,509 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:54:20,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 19:54:20,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:54:20,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:20,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:54:20,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:20,798 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:54:20,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-03-03 19:54:20,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-03-03 19:54:20,981 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 [2022-03-03 19:54:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:21,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:21,173 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:21,174 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 36 treesize of output 60 [2022-03-03 19:54:21,445 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:21,446 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 45 treesize of output 69 [2022-03-03 19:54:21,471 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:21,471 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 67 treesize of output 85 [2022-03-03 19:54:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:21,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221856511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:21,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:21,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 33 [2022-03-03 19:54:21,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517640898] [2022-03-03 19:54:21,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:21,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 19:54:21,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:21,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 19:54:21,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:54:21,793 INFO L87 Difference]: Start difference. First operand 36789 states and 151410 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 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) [2022-03-03 19:54:24,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:24,143 INFO L93 Difference]: Finished difference Result 83699 states and 340717 transitions. [2022-03-03 19:54:24,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:54:24,143 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 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 39 [2022-03-03 19:54:24,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:24,523 INFO L225 Difference]: With dead ends: 83699 [2022-03-03 19:54:24,523 INFO L226 Difference]: Without dead ends: 83644 [2022-03-03 19:54:24,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=376, Invalid=2486, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 19:54:24,525 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 537 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 2904 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 2995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:24,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 511 Invalid, 2995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2904 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:54:24,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83644 states. [2022-03-03 19:54:26,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83644 to 36511. [2022-03-03 19:54:26,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36511 states, 36510 states have (on average 4.134155026020268) internal successors, (150938), 36510 states have internal predecessors, (150938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36511 states to 36511 states and 150938 transitions. [2022-03-03 19:54:26,551 INFO L78 Accepts]: Start accepts. Automaton has 36511 states and 150938 transitions. Word has length 39 [2022-03-03 19:54:26,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:26,552 INFO L470 AbstractCegarLoop]: Abstraction has 36511 states and 150938 transitions. [2022-03-03 19:54:26,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 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) [2022-03-03 19:54:26,552 INFO L276 IsEmpty]: Start isEmpty. Operand 36511 states and 150938 transitions. [2022-03-03 19:54:26,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:54:26,650 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:26,650 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:26,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-03 19:54:26,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:26,851 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:54:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:26,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1038211985, now seen corresponding path program 23 times [2022-03-03 19:54:26,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:26,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649049623] [2022-03-03 19:54:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:26,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:27,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:27,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649049623] [2022-03-03 19:54:27,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649049623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:27,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980633032] [2022-03-03 19:54:27,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:54:27,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:27,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:27,242 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:54:27,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 19:54:27,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:54:27,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:27,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-03 19:54:27,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:27,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:27,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:27,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:27,554 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:27,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2022-03-03 19:54:27,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-03-03 19:54:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:27,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:28,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:28,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:28,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:28,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:28,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 37 [2022-03-03 19:54:28,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:28,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:28,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:28,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:28,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2022-03-03 19:54:28,756 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:28,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 20 treesize of output 45 [2022-03-03 19:54:28,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:28,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:28,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:28,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2022-03-03 19:54:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:28,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980633032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:28,866 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:28,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 40 [2022-03-03 19:54:28,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910821940] [2022-03-03 19:54:28,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:28,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:54:28,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:29,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:54:29,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:54:29,464 INFO L87 Difference]: Start difference. First operand 36511 states and 150938 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:43,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:43,094 INFO L93 Difference]: Finished difference Result 112883 states and 456658 transitions. [2022-03-03 19:54:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-03-03 19:54:43,094 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:54:43,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:43,628 INFO L225 Difference]: With dead ends: 112883 [2022-03-03 19:54:43,628 INFO L226 Difference]: Without dead ends: 112572 [2022-03-03 19:54:43,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12601 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=4044, Invalid=31488, Unknown=0, NotChecked=0, Total=35532 [2022-03-03 19:54:43,630 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1807 mSDsluCounter, 2863 mSDsCounter, 0 mSdLazyCounter, 4215 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1807 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 6914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 4215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2280 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:43,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1807 Valid, 1286 Invalid, 6914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 4215 Invalid, 0 Unknown, 2280 Unchecked, 2.3s Time] [2022-03-03 19:54:43,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112572 states. [2022-03-03 19:54:45,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112572 to 36899. [2022-03-03 19:54:45,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36899 states, 36898 states have (on average 4.128326738576616) internal successors, (152327), 36898 states have internal predecessors, (152327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:45,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36899 states to 36899 states and 152327 transitions. [2022-03-03 19:54:45,856 INFO L78 Accepts]: Start accepts. Automaton has 36899 states and 152327 transitions. Word has length 39 [2022-03-03 19:54:45,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:45,857 INFO L470 AbstractCegarLoop]: Abstraction has 36899 states and 152327 transitions. [2022-03-03 19:54:45,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:45,857 INFO L276 IsEmpty]: Start isEmpty. Operand 36899 states and 152327 transitions. [2022-03-03 19:54:45,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:54:45,956 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:45,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:45,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-03 19:54:46,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:46,157 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:54:46,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:46,157 INFO L85 PathProgramCache]: Analyzing trace with hash 804294421, now seen corresponding path program 24 times [2022-03-03 19:54:46,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:46,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494613381] [2022-03-03 19:54:46,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:46,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:46,551 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:46,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494613381] [2022-03-03 19:54:46,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494613381] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:46,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951484499] [2022-03-03 19:54:46,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:54:46,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:46,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:46,553 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:54:46,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 19:54:46,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:54:46,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:46,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-03 19:54:46,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:46,895 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:46,896 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 26 treesize of output 44 [2022-03-03 19:54:47,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-03 19:54:47,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:47,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-03-03 19:54:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:47,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:47,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:47,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:47,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:47,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 73 [2022-03-03 19:54:48,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:48,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:48,454 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 72 [2022-03-03 19:54:48,481 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:48,482 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 78 treesize of output 82 [2022-03-03 19:54:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:48,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951484499] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:48,897 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:48,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 38 [2022-03-03 19:54:48,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204012626] [2022-03-03 19:54:48,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:48,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-03 19:54:48,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:48,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-03 19:54:48,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:54:48,898 INFO L87 Difference]: Start difference. First operand 36899 states and 152327 transitions. Second operand has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 38 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) [2022-03-03 19:54:52,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:52,828 INFO L93 Difference]: Finished difference Result 68964 states and 278866 transitions. [2022-03-03 19:54:52,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 19:54:52,829 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 38 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 39 [2022-03-03 19:54:52,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:53,128 INFO L225 Difference]: With dead ends: 68964 [2022-03-03 19:54:53,128 INFO L226 Difference]: Without dead ends: 68817 [2022-03-03 19:54:53,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2408 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1099, Invalid=6557, Unknown=0, NotChecked=0, Total=7656 [2022-03-03 19:54:53,129 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 647 mSDsluCounter, 1672 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 3794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1533 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:53,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 821 Invalid, 3794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2165 Invalid, 0 Unknown, 1533 Unchecked, 1.1s Time] [2022-03-03 19:54:53,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68817 states. [2022-03-03 19:54:54,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68817 to 37697. [2022-03-03 19:54:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37697 states, 37696 states have (on average 4.120331069609508) internal successors, (155320), 37696 states have internal predecessors, (155320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:54,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37697 states to 37697 states and 155320 transitions. [2022-03-03 19:54:54,617 INFO L78 Accepts]: Start accepts. Automaton has 37697 states and 155320 transitions. Word has length 39 [2022-03-03 19:54:54,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:54,617 INFO L470 AbstractCegarLoop]: Abstraction has 37697 states and 155320 transitions. [2022-03-03 19:54:54,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 38 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) [2022-03-03 19:54:54,617 INFO L276 IsEmpty]: Start isEmpty. Operand 37697 states and 155320 transitions. [2022-03-03 19:54:54,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:54:54,708 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:54,708 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:54,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-03 19:54:54,909 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,SelfDestructingSolverStorable32 [2022-03-03 19:54:54,909 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:54:54,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:54,909 INFO L85 PathProgramCache]: Analyzing trace with hash -305709141, now seen corresponding path program 25 times [2022-03-03 19:54:54,910 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:54,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137865388] [2022-03-03 19:54:54,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:54,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:55,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:55,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137865388] [2022-03-03 19:54:55,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137865388] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:55,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200906670] [2022-03-03 19:54:55,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:54:55,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:55,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:55,293 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:54:55,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 19:54:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:55,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:54:55,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:55,590 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:54:55,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2022-03-03 19:54:55,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-03 19:54:55,746 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 17 treesize of output 9 [2022-03-03 19:54:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:55,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:56,001 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:56,001 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 39 treesize of output 63 [2022-03-03 19:54:56,246 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:56,246 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 45 treesize of output 69 [2022-03-03 19:54:56,270 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:54:56,271 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 67 treesize of output 85 [2022-03-03 19:54:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:56,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200906670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:56,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:56,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-03-03 19:54:56,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937993583] [2022-03-03 19:54:56,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:56,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:54:56,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:56,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:54:56,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:54:56,740 INFO L87 Difference]: Start difference. First operand 37697 states and 155320 transitions. Second operand has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 34 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:00,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:00,015 INFO L93 Difference]: Finished difference Result 91699 states and 372721 transitions. [2022-03-03 19:55:00,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 19:55:00,015 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 34 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:55:00,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:00,423 INFO L225 Difference]: With dead ends: 91699 [2022-03-03 19:55:00,424 INFO L226 Difference]: Without dead ends: 91443 [2022-03-03 19:55:00,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=543, Invalid=3747, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 19:55:00,424 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 645 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 3676 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 3773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 3676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:00,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 663 Invalid, 3773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 3676 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-03 19:55:00,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91443 states. [2022-03-03 19:55:02,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91443 to 37049. [2022-03-03 19:55:02,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37049 states, 37048 states have (on average 4.127051392787735) internal successors, (152899), 37048 states have internal predecessors, (152899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:02,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37049 states to 37049 states and 152899 transitions. [2022-03-03 19:55:02,278 INFO L78 Accepts]: Start accepts. Automaton has 37049 states and 152899 transitions. Word has length 39 [2022-03-03 19:55:02,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:02,278 INFO L470 AbstractCegarLoop]: Abstraction has 37049 states and 152899 transitions. [2022-03-03 19:55:02,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6857142857142855) internal successors, (94), 34 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 37049 states and 152899 transitions. [2022-03-03 19:55:02,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:55:02,360 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:02,360 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:02,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:02,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-03 19:55:02,560 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:55:02,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:02,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1678817259, now seen corresponding path program 26 times [2022-03-03 19:55:02,561 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:02,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423655054] [2022-03-03 19:55:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:02,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:02,931 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:02,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423655054] [2022-03-03 19:55:02,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423655054] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:02,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520945094] [2022-03-03 19:55:02,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:55:02,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:02,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:02,933 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:02,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 19:55:02,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:55:02,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:02,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:55:02,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:03,235 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:55:03,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2022-03-03 19:55:03,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-03-03 19:55:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:03,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:03,743 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:03,744 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 39 treesize of output 63 [2022-03-03 19:55:03,974 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:03,975 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 46 treesize of output 70 [2022-03-03 19:55:04,000 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:04,000 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 86 [2022-03-03 19:55:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:04,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520945094] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:04,413 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:04,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 33 [2022-03-03 19:55:04,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503941640] [2022-03-03 19:55:04,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:04,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 19:55:04,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:04,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 19:55:04,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:55:04,414 INFO L87 Difference]: Start difference. First operand 37049 states and 152899 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 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) [2022-03-03 19:55:06,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:06,454 INFO L93 Difference]: Finished difference Result 69511 states and 285616 transitions. [2022-03-03 19:55:06,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:55:06,455 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 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 39 [2022-03-03 19:55:06,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:06,883 INFO L225 Difference]: With dead ends: 69511 [2022-03-03 19:55:06,883 INFO L226 Difference]: Without dead ends: 69456 [2022-03-03 19:55:06,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=309, Invalid=1947, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 19:55:06,885 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 383 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 2846 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 2906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:06,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 534 Invalid, 2906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2846 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:55:06,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69456 states. [2022-03-03 19:55:07,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69456 to 36877. [2022-03-03 19:55:07,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36877 states, 36876 states have (on average 4.128864301985031) internal successors, (152256), 36876 states have internal predecessors, (152256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:08,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36877 states to 36877 states and 152256 transitions. [2022-03-03 19:55:08,232 INFO L78 Accepts]: Start accepts. Automaton has 36877 states and 152256 transitions. Word has length 39 [2022-03-03 19:55:08,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:08,232 INFO L470 AbstractCegarLoop]: Abstraction has 36877 states and 152256 transitions. [2022-03-03 19:55:08,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 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) [2022-03-03 19:55:08,232 INFO L276 IsEmpty]: Start isEmpty. Operand 36877 states and 152256 transitions. [2022-03-03 19:55:08,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:55:08,320 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:08,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:08,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:08,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-03 19:55:08,521 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:55:08,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:08,521 INFO L85 PathProgramCache]: Analyzing trace with hash 847258595, now seen corresponding path program 27 times [2022-03-03 19:55:08,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:08,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614269078] [2022-03-03 19:55:08,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:08,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:08,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:08,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614269078] [2022-03-03 19:55:08,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614269078] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:08,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755142806] [2022-03-03 19:55:08,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:55:08,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:08,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:08,910 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:08,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 19:55:08,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:55:08,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:08,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-03 19:55:08,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:09,342 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:55:09,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2022-03-03 19:55:09,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:09,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:09,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2022-03-03 19:55:10,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:10,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:10,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:10,102 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 59 treesize of output 49 [2022-03-03 19:55:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:10,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:10,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:10,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:10,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:10,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 70 [2022-03-03 19:55:11,732 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:11,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 84 [2022-03-03 19:55:11,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:11,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:11,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:11,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 96 [2022-03-03 19:55:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:12,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755142806] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:12,773 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:12,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 39 [2022-03-03 19:55:12,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153833774] [2022-03-03 19:55:12,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:12,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 19:55:12,774 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:12,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 19:55:12,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:55:12,774 INFO L87 Difference]: Start difference. First operand 36877 states and 152256 transitions. Second operand has 40 states, 40 states have (on average 2.575) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:15,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:15,607 INFO L93 Difference]: Finished difference Result 58469 states and 237492 transitions. [2022-03-03 19:55:15,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-03 19:55:15,607 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.575) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:55:15,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:15,848 INFO L225 Difference]: With dead ends: 58469 [2022-03-03 19:55:15,849 INFO L226 Difference]: Without dead ends: 58410 [2022-03-03 19:55:15,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 67 SyntacticMatches, 11 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2379 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1104, Invalid=5376, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 19:55:15,849 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 486 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 3548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2688 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:15,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 545 Invalid, 3548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 788 Invalid, 0 Unknown, 2688 Unchecked, 0.4s Time] [2022-03-03 19:55:16,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58410 states. [2022-03-03 19:55:16,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58410 to 37371. [2022-03-03 19:55:16,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37371 states, 37370 states have (on average 4.122076531977522) internal successors, (154042), 37370 states have internal predecessors, (154042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:17,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37371 states to 37371 states and 154042 transitions. [2022-03-03 19:55:17,070 INFO L78 Accepts]: Start accepts. Automaton has 37371 states and 154042 transitions. Word has length 39 [2022-03-03 19:55:17,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:17,070 INFO L470 AbstractCegarLoop]: Abstraction has 37371 states and 154042 transitions. [2022-03-03 19:55:17,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.575) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:17,070 INFO L276 IsEmpty]: Start isEmpty. Operand 37371 states and 154042 transitions. [2022-03-03 19:55:17,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:55:17,160 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:17,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:17,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:17,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:17,361 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:55:17,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:17,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1095774921, now seen corresponding path program 28 times [2022-03-03 19:55:17,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:17,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654094856] [2022-03-03 19:55:17,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:17,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:17,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:18,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654094856] [2022-03-03 19:55:18,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654094856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:18,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94904837] [2022-03-03 19:55:18,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:55:18,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:18,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:18,001 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:18,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 19:55:18,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:55:18,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:18,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:55:18,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:18,308 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:55:18,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2022-03-03 19:55:18,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-03 19:55:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:18,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:18,743 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:18,743 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 55 treesize of output 73 [2022-03-03 19:55:19,036 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:19,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 83 [2022-03-03 19:55:19,062 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:19,063 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 81 treesize of output 93 [2022-03-03 19:55:19,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:19,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94904837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:19,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:19,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 33 [2022-03-03 19:55:19,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453364946] [2022-03-03 19:55:19,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:19,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 19:55:19,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:19,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 19:55:19,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:55:19,423 INFO L87 Difference]: Start difference. First operand 37371 states and 154042 transitions. Second operand has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 33 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:21,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:21,725 INFO L93 Difference]: Finished difference Result 72319 states and 295080 transitions. [2022-03-03 19:55:21,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:55:21,725 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 33 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:55:21,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:22,038 INFO L225 Difference]: With dead ends: 72319 [2022-03-03 19:55:22,038 INFO L226 Difference]: Without dead ends: 72123 [2022-03-03 19:55:22,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=327, Invalid=2325, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:55:22,039 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 444 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 2650 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 2725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:22,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 462 Invalid, 2725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2650 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:55:22,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72123 states. [2022-03-03 19:55:23,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72123 to 36801. [2022-03-03 19:55:23,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36801 states, 36800 states have (on average 4.13133152173913) internal successors, (152033), 36800 states have internal predecessors, (152033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:23,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36801 states to 36801 states and 152033 transitions. [2022-03-03 19:55:23,376 INFO L78 Accepts]: Start accepts. Automaton has 36801 states and 152033 transitions. Word has length 39 [2022-03-03 19:55:23,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:23,376 INFO L470 AbstractCegarLoop]: Abstraction has 36801 states and 152033 transitions. [2022-03-03 19:55:23,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 33 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:23,377 INFO L276 IsEmpty]: Start isEmpty. Operand 36801 states and 152033 transitions. [2022-03-03 19:55:23,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:55:23,464 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:23,464 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:23,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-03 19:55:23,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-03 19:55:23,665 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:55:23,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:23,665 INFO L85 PathProgramCache]: Analyzing trace with hash 630820215, now seen corresponding path program 29 times [2022-03-03 19:55:23,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:23,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337587880] [2022-03-03 19:55:23,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:23,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:24,373 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:24,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337587880] [2022-03-03 19:55:24,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337587880] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:24,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489635668] [2022-03-03 19:55:24,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:55:24,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:24,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:24,374 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:24,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 19:55:24,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:55:24,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:24,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-03 19:55:24,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:24,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:24,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 56 [2022-03-03 19:55:24,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-03-03 19:55:24,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:24,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:24,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:24,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:24,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 45 [2022-03-03 19:55:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:25,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:25,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:25,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:25,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:25,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:25,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 37 [2022-03-03 19:55:26,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:26,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:26,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 69 [2022-03-03 19:55:26,582 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:26,583 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 75 treesize of output 79 [2022-03-03 19:55:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:26,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489635668] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:26,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:26,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 40 [2022-03-03 19:55:26,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041492362] [2022-03-03 19:55:26,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:26,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:55:26,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:26,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:55:26,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:55:26,822 INFO L87 Difference]: Start difference. First operand 36801 states and 152033 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:33,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:33,963 INFO L93 Difference]: Finished difference Result 80252 states and 327195 transitions. [2022-03-03 19:55:33,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-03 19:55:33,964 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:55:33,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:34,433 INFO L225 Difference]: With dead ends: 80252 [2022-03-03 19:55:34,433 INFO L226 Difference]: Without dead ends: 80059 [2022-03-03 19:55:34,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 61 SyntacticMatches, 11 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4120 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1816, Invalid=11990, Unknown=0, NotChecked=0, Total=13806 [2022-03-03 19:55:34,434 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 1351 mSDsluCounter, 2580 mSDsCounter, 0 mSdLazyCounter, 3555 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 7195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 3555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3375 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:34,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1351 Valid, 1005 Invalid, 7195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 3555 Invalid, 0 Unknown, 3375 Unchecked, 1.7s Time] [2022-03-03 19:55:34,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80059 states. [2022-03-03 19:55:35,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80059 to 37259. [2022-03-03 19:55:35,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37259 states, 37258 states have (on average 4.12480541091846) internal successors, (153682), 37258 states have internal predecessors, (153682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:35,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37259 states to 37259 states and 153682 transitions. [2022-03-03 19:55:35,951 INFO L78 Accepts]: Start accepts. Automaton has 37259 states and 153682 transitions. Word has length 39 [2022-03-03 19:55:35,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:35,951 INFO L470 AbstractCegarLoop]: Abstraction has 37259 states and 153682 transitions. [2022-03-03 19:55:35,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:35,951 INFO L276 IsEmpty]: Start isEmpty. Operand 37259 states and 153682 transitions. [2022-03-03 19:55:36,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:55:36,035 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:36,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:36,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-03 19:55:36,236 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,SelfDestructingSolverStorable37 [2022-03-03 19:55:36,236 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:55:36,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:36,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1493840823, now seen corresponding path program 30 times [2022-03-03 19:55:36,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:36,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977133781] [2022-03-03 19:55:36,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:36,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:36,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:36,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977133781] [2022-03-03 19:55:36,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977133781] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:36,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453490705] [2022-03-03 19:55:36,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:55:36,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:36,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:36,621 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:36,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 19:55:36,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:55:36,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:36,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-03 19:55:36,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:37,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:37,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:37,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:37,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-03-03 19:55:37,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:37,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:37,645 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 33 treesize of output 25 [2022-03-03 19:55:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:37,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:38,025 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:38,025 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 41 treesize of output 65 [2022-03-03 19:55:39,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:39,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:39,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:39,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 69 [2022-03-03 19:55:39,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:39,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:39,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:39,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:39,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 77 [2022-03-03 19:55:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:39,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453490705] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:39,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:39,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 41 [2022-03-03 19:55:39,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537268444] [2022-03-03 19:55:39,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:39,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:55:39,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:39,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:55:39,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1491, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:55:39,732 INFO L87 Difference]: Start difference. First operand 37259 states and 153682 transitions. Second operand has 42 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:43,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:43,883 INFO L93 Difference]: Finished difference Result 80782 states and 325196 transitions. [2022-03-03 19:55:43,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-03 19:55:43,883 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:55:43,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:44,216 INFO L225 Difference]: With dead ends: 80782 [2022-03-03 19:55:44,216 INFO L226 Difference]: Without dead ends: 80728 [2022-03-03 19:55:44,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2798 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1182, Invalid=8324, Unknown=0, NotChecked=0, Total=9506 [2022-03-03 19:55:44,217 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 527 mSDsluCounter, 1666 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 4392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2594 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:44,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 842 Invalid, 4392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1721 Invalid, 0 Unknown, 2594 Unchecked, 0.8s Time] [2022-03-03 19:55:44,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80728 states. [2022-03-03 19:55:45,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80728 to 37763. [2022-03-03 19:55:45,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37763 states, 37762 states have (on average 4.117737407976272) internal successors, (155494), 37762 states have internal predecessors, (155494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:45,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37763 states to 37763 states and 155494 transitions. [2022-03-03 19:55:45,697 INFO L78 Accepts]: Start accepts. Automaton has 37763 states and 155494 transitions. Word has length 39 [2022-03-03 19:55:45,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:45,697 INFO L470 AbstractCegarLoop]: Abstraction has 37763 states and 155494 transitions. [2022-03-03 19:55:45,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:45,697 INFO L276 IsEmpty]: Start isEmpty. Operand 37763 states and 155494 transitions. [2022-03-03 19:55:45,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:55:45,792 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:45,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:45,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:45,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-03 19:55:45,993 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:55:45,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:45,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1514365043, now seen corresponding path program 31 times [2022-03-03 19:55:45,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:45,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80290854] [2022-03-03 19:55:45,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:45,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:46,630 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:46,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80290854] [2022-03-03 19:55:46,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80290854] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:46,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028479054] [2022-03-03 19:55:46,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:55:46,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:46,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:46,632 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:46,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 19:55:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:46,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:55:46,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:47,080 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:55:47,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2022-03-03 19:55:47,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2022-03-03 19:55:47,161 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 17 treesize of output 9 [2022-03-03 19:55:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:47,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:47,419 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:47,419 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 39 treesize of output 63 [2022-03-03 19:55:47,661 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:47,661 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 45 treesize of output 69 [2022-03-03 19:55:47,687 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:47,688 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 67 treesize of output 85 [2022-03-03 19:55:47,931 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:47,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028479054] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:47,932 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:47,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-03-03 19:55:47,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232057411] [2022-03-03 19:55:47,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:47,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:55:47,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:47,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:55:47,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:55:47,933 INFO L87 Difference]: Start difference. First operand 37763 states and 155494 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:50,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:50,618 INFO L93 Difference]: Finished difference Result 85303 states and 348821 transitions. [2022-03-03 19:55:50,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 19:55:50,619 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:55:50,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:51,015 INFO L225 Difference]: With dead ends: 85303 [2022-03-03 19:55:51,016 INFO L226 Difference]: Without dead ends: 85055 [2022-03-03 19:55:51,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=421, Invalid=2549, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 19:55:51,016 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 669 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 2840 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 2942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:51,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 502 Invalid, 2942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2840 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-03 19:55:51,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85055 states. [2022-03-03 19:55:52,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85055 to 37951. [2022-03-03 19:55:52,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37951 states, 37950 states have (on average 4.115889328063241) internal successors, (156198), 37950 states have internal predecessors, (156198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:52,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37951 states to 37951 states and 156198 transitions. [2022-03-03 19:55:52,639 INFO L78 Accepts]: Start accepts. Automaton has 37951 states and 156198 transitions. Word has length 39 [2022-03-03 19:55:52,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:52,640 INFO L470 AbstractCegarLoop]: Abstraction has 37951 states and 156198 transitions. [2022-03-03 19:55:52,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:52,640 INFO L276 IsEmpty]: Start isEmpty. Operand 37951 states and 156198 transitions. [2022-03-03 19:55:52,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:55:52,947 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:52,947 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:52,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-03 19:55:53,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-03 19:55:53,155 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:55:53,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:53,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1838065757, now seen corresponding path program 32 times [2022-03-03 19:55:53,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:53,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069914244] [2022-03-03 19:55:53,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:53,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:53,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:53,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069914244] [2022-03-03 19:55:53,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069914244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:53,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310868018] [2022-03-03 19:55:53,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:55:53,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:53,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:53,543 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:53,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 19:55:53,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:55:53,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:53,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:55:53,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:53,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-03 19:55:54,018 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:55:54,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 26 [2022-03-03 19:55:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:54,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:54,274 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:54,274 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 39 treesize of output 63 [2022-03-03 19:55:54,517 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:54,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 69 [2022-03-03 19:55:54,543 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:55:54,544 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 67 treesize of output 85 [2022-03-03 19:55:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:54,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310868018] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:54,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:54,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-03-03 19:55:54,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772525416] [2022-03-03 19:55:54,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:54,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:55:54,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:54,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:55:54,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:55:54,875 INFO L87 Difference]: Start difference. First operand 37951 states and 156198 transitions. Second operand has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 34 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) [2022-03-03 19:55:57,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:57,241 INFO L93 Difference]: Finished difference Result 93729 states and 380985 transitions. [2022-03-03 19:55:57,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:55:57,242 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 34 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 39 [2022-03-03 19:55:57,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:57,660 INFO L225 Difference]: With dead ends: 93729 [2022-03-03 19:55:57,660 INFO L226 Difference]: Without dead ends: 93577 [2022-03-03 19:55:57,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=444, Invalid=2636, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 19:55:57,661 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 665 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 2056 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 2147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:57,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [665 Valid, 339 Invalid, 2147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2056 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 19:55:57,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93577 states. [2022-03-03 19:55:59,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93577 to 38039. [2022-03-03 19:55:59,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38039 states, 38038 states have (on average 4.116515063883485) internal successors, (156584), 38038 states have internal predecessors, (156584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:59,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38039 states to 38039 states and 156584 transitions. [2022-03-03 19:55:59,499 INFO L78 Accepts]: Start accepts. Automaton has 38039 states and 156584 transitions. Word has length 39 [2022-03-03 19:55:59,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:59,499 INFO L470 AbstractCegarLoop]: Abstraction has 38039 states and 156584 transitions. [2022-03-03 19:55:59,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.657142857142857) internal successors, (93), 34 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) [2022-03-03 19:55:59,499 INFO L276 IsEmpty]: Start isEmpty. Operand 38039 states and 156584 transitions. [2022-03-03 19:55:59,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:55:59,581 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:59,581 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:59,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-03 19:55:59,782 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,SelfDestructingSolverStorable40 [2022-03-03 19:55:59,782 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-03-03 19:55:59,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:59,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1634145011, now seen corresponding path program 33 times [2022-03-03 19:55:59,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:59,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559444199] [2022-03-03 19:55:59,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:59,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:00,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:00,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559444199] [2022-03-03 19:56:00,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559444199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:00,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656825425] [2022-03-03 19:56:00,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:56:00,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:00,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:00,155 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:00,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 19:56:00,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 19:56:00,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:00,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-03 19:56:00,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:00,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-03 19:56:00,617 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:00,617 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 42 treesize of output 60 [2022-03-03 19:56:00,659 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 16 treesize of output 8 [2022-03-03 19:56:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:00,732 INFO L328 TraceCheckSpWp]: Computing backward predicates...