/usr/bin/java -Xmx16000000000 -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/queue-add-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:43:01,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:43:01,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:43:01,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:43:01,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 05:43:01,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 05:43:01,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 05:43:01,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 05:43:01,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 05:43:01,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 05:43:01,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 05:43:01,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 05:43:01,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 05:43:01,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 05:43:01,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 05:43:01,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 05:43:01,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 05:43:01,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 05:43:01,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 05:43:01,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 05:43:01,453 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 [2021-06-05 05:43:01,486 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:43:01,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:43:01,486 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:43:01,486 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:43:01,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:43:01,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:43:01,488 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:43:01,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:43:01,488 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:43:01,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:43:01,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:43:01,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:43:01,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:43:01,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:43:01,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:43:01,489 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:43:01,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:43:01,489 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:43:01,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:43:01,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:43:01,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:43:01,490 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:43:01,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:43:01,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:43:01,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:43:01,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:43:01,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:43:01,490 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:43:01,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:43:01,491 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:43:01,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:43:01,491 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:43:01,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:43:01,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:43:01,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:43:01,761 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:43:01,763 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:43:01,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl [2021-06-05 05:43:02,116 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl' [2021-06-05 05:43:02,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:43:02,173 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:43:02,177 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:43:02,177 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:43:02,177 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:43:02,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:43:02" (1/1) ... [2021-06-05 05:43:02,197 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:43:02" (1/1) ... [2021-06-05 05:43:02,204 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:43:02,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:43:02,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:43:02,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:43:02,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:43:02" (1/1) ... [2021-06-05 05:43:02,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:43:02" (1/1) ... [2021-06-05 05:43:02,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:43:02" (1/1) ... [2021-06-05 05:43:02,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:43:02" (1/1) ... [2021-06-05 05:43:02,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:43:02" (1/1) ... [2021-06-05 05:43:02,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:43:02" (1/1) ... [2021-06-05 05:43:02,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:43:02" (1/1) ... [2021-06-05 05:43:02,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:43:02,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:43:02,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:43:02,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:43:02,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:43:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:43:02,277 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:43:02,277 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:43:02,277 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:43:02,277 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:43:02,277 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:43:02,277 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:43:02,277 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:43:02,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:43:02,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:43:02,278 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 05:43:02,397 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:43:02,397 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 05:43:02,399 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:43:02 BoogieIcfgContainer [2021-06-05 05:43:02,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:43:02,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:43:02,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:43:02,402 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:43:02,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:43:02" (1/2) ... [2021-06-05 05:43:02,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd8f586 and model type queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:43:02, skipping insertion in model container [2021-06-05 05:43:02,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:43:02" (2/2) ... [2021-06-05 05:43:02,403 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2.wvr.bpl [2021-06-05 05:43:02,407 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:43:02,407 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:43:02,407 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:43:02,408 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:43:02,427 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 05:43:02,440 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 05:43:02,459 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:43:02,459 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:43:02,459 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:43:02,459 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:43:02,459 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:43:02,459 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:43:02,459 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:43:02,460 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:43:02,471 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 26 transitions, 68 flow [2021-06-05 05:43:02,481 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 78 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 77 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:02,483 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 77 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:02,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 05:43:02,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:02,488 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:02,488 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:02,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:02,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1737383228, now seen corresponding path program 1 times [2021-06-05 05:43:02,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:02,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58076641] [2021-06-05 05:43:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:02,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:02,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58076641] [2021-06-05 05:43:02,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58076641] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:43:02,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:43:02,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:43:02,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038813187] [2021-06-05 05:43:02,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:43:02,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:02,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:43:02,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:43:02,590 INFO L87 Difference]: Start difference. First operand has 78 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 77 states have internal predecessors, (149), 0 states have call successors, (0), 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 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:02,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:02,607 INFO L93 Difference]: Finished difference Result 84 states and 163 transitions. [2021-06-05 05:43:02,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:43:02,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 05:43:02,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:02,615 INFO L225 Difference]: With dead ends: 84 [2021-06-05 05:43:02,615 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 05:43:02,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:43:02,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 05:43:02,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-06-05 05:43:02,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.963855421686747) internal successors, (163), 83 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:02,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 163 transitions. [2021-06-05 05:43:02,643 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 163 transitions. Word has length 15 [2021-06-05 05:43:02,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:02,644 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 163 transitions. [2021-06-05 05:43:02,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:02,644 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 163 transitions. [2021-06-05 05:43:02,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:43:02,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:02,645 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:02,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:43:02,645 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:02,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:02,646 INFO L82 PathProgramCache]: Analyzing trace with hash -425397927, now seen corresponding path program 1 times [2021-06-05 05:43:02,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:02,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770476689] [2021-06-05 05:43:02,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:02,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:02,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770476689] [2021-06-05 05:43:02,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770476689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:02,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423924815] [2021-06-05 05:43:02,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:02,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:43:02,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:03,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423924815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:03,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:03,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 05:43:03,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530917254] [2021-06-05 05:43:03,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:43:03,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:03,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:43:03,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:43:03,059 INFO L87 Difference]: Start difference. First operand 84 states and 163 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:03,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:03,318 INFO L93 Difference]: Finished difference Result 197 states and 375 transitions. [2021-06-05 05:43:03,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:43:03,318 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 05:43:03,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:03,324 INFO L225 Difference]: With dead ends: 197 [2021-06-05 05:43:03,325 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 05:43:03,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 241.3ms TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:43:03,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 05:43:03,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 113. [2021-06-05 05:43:03,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.9285714285714286) internal successors, (216), 112 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:03,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 216 transitions. [2021-06-05 05:43:03,344 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 216 transitions. Word has length 19 [2021-06-05 05:43:03,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:03,344 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 216 transitions. [2021-06-05 05:43:03,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:03,344 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 216 transitions. [2021-06-05 05:43:03,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:43:03,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:03,345 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:03,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 05:43:03,559 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:03,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:03,560 INFO L82 PathProgramCache]: Analyzing trace with hash 424057207, now seen corresponding path program 2 times [2021-06-05 05:43:03,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:03,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674398270] [2021-06-05 05:43:03,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:03,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:03,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674398270] [2021-06-05 05:43:03,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674398270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:03,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326164509] [2021-06-05 05:43:03,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:03,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:43:03,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:03,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:43:03,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:03,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326164509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:03,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:03,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:43:03,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763019590] [2021-06-05 05:43:03,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:43:03,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:03,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:43:03,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:43:03,875 INFO L87 Difference]: Start difference. First operand 113 states and 216 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-06-05 05:43:04,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:04,095 INFO L93 Difference]: Finished difference Result 233 states and 445 transitions. [2021-06-05 05:43:04,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:43:04,095 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 19 [2021-06-05 05:43:04,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:04,096 INFO L225 Difference]: With dead ends: 233 [2021-06-05 05:43:04,096 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 05:43:04,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:43:04,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 05:43:04,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 117. [2021-06-05 05:43:04,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.9655172413793103) internal successors, (228), 116 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:04,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 228 transitions. [2021-06-05 05:43:04,101 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 228 transitions. Word has length 19 [2021-06-05 05:43:04,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:04,102 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 228 transitions. [2021-06-05 05:43:04,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-06-05 05:43:04,102 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 228 transitions. [2021-06-05 05:43:04,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:43:04,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:04,103 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:04,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:04,317 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:04,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:04,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1293234039, now seen corresponding path program 3 times [2021-06-05 05:43:04,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:04,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026068579] [2021-06-05 05:43:04,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:04,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:04,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026068579] [2021-06-05 05:43:04,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026068579] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:43:04,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:43:04,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 05:43:04,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119467682] [2021-06-05 05:43:04,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:43:04,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:04,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:43:04,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:43:04,343 INFO L87 Difference]: Start difference. First operand 117 states and 228 transitions. 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) [2021-06-05 05:43:04,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:04,349 INFO L93 Difference]: Finished difference Result 120 states and 230 transitions. [2021-06-05 05:43:04,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:43:04,352 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 [2021-06-05 05:43:04,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:04,353 INFO L225 Difference]: With dead ends: 120 [2021-06-05 05:43:04,353 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 05:43:04,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:43:04,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 05:43:04,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-06-05 05:43:04,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.9327731092436975) internal successors, (230), 119 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:04,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 230 transitions. [2021-06-05 05:43:04,356 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 230 transitions. Word has length 19 [2021-06-05 05:43:04,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:04,358 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 230 transitions. [2021-06-05 05:43:04,358 INFO L483 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) [2021-06-05 05:43:04,359 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 230 transitions. [2021-06-05 05:43:04,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:43:04,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:04,360 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:04,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 05:43:04,361 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:04,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:04,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1628191443, now seen corresponding path program 4 times [2021-06-05 05:43:04,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:04,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844733176] [2021-06-05 05:43:04,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:04,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:04,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:04,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844733176] [2021-06-05 05:43:04,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844733176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:04,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060856609] [2021-06-05 05:43:04,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:04,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:43:04,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:04,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:43:04,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:04,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060856609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:04,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:04,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 05:43:04,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571184072] [2021-06-05 05:43:04,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:43:04,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:04,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:43:04,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:43:04,568 INFO L87 Difference]: Start difference. First operand 120 states and 230 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:04,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:04,774 INFO L93 Difference]: Finished difference Result 175 states and 327 transitions. [2021-06-05 05:43:04,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:43:04,774 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:43:04,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:04,775 INFO L225 Difference]: With dead ends: 175 [2021-06-05 05:43:04,775 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 05:43:04,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 179.4ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:43:04,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 05:43:04,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 114. [2021-06-05 05:43:04,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.920353982300885) internal successors, (217), 113 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:04,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 217 transitions. [2021-06-05 05:43:04,780 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 217 transitions. Word has length 19 [2021-06-05 05:43:04,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:04,780 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 217 transitions. [2021-06-05 05:43:04,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:04,780 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 217 transitions. [2021-06-05 05:43:04,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 05:43:04,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:04,781 INFO L521 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] [2021-06-05 05:43:04,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:04,997 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:04,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:04,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1114878874, now seen corresponding path program 1 times [2021-06-05 05:43:04,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:04,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122680746] [2021-06-05 05:43:04,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:05,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:05,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122680746] [2021-06-05 05:43:05,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122680746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:05,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63804995] [2021-06-05 05:43:05,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:05,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:43:05,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:05,132 INFO L388 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 [2021-06-05 05:43:05,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:05,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:05,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:05,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:43:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:05,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63804995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:05,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:05,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:43:05,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696560451] [2021-06-05 05:43:05,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:43:05,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:05,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:43:05,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:43:05,149 INFO L87 Difference]: Start difference. First operand 114 states and 217 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:05,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:05,201 INFO L93 Difference]: Finished difference Result 152 states and 292 transitions. [2021-06-05 05:43:05,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:43:05,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 05:43:05,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:05,202 INFO L225 Difference]: With dead ends: 152 [2021-06-05 05:43:05,203 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 05:43:05,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:43:05,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 05:43:05,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 122. [2021-06-05 05:43:05,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.9834710743801653) internal successors, (240), 121 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 240 transitions. [2021-06-05 05:43:05,207 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 240 transitions. Word has length 22 [2021-06-05 05:43:05,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:05,207 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 240 transitions. [2021-06-05 05:43:05,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 240 transitions. [2021-06-05 05:43:05,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:43:05,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:05,208 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:05,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:05,417 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:05,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:05,417 INFO L82 PathProgramCache]: Analyzing trace with hash 300560118, now seen corresponding path program 5 times [2021-06-05 05:43:05,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:05,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34437389] [2021-06-05 05:43:05,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:05,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:05,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:05,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34437389] [2021-06-05 05:43:05,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34437389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:05,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409522111] [2021-06-05 05:43:05,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:05,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:43:05,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:05,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:43:05,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:05,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409522111] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:43:05,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 05:43:05,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-06-05 05:43:05,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201097043] [2021-06-05 05:43:05,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:43:05,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:05,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:43:05,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:43:05,537 INFO L87 Difference]: Start difference. First operand 122 states and 240 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:05,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:05,544 INFO L93 Difference]: Finished difference Result 288 states and 559 transitions. [2021-06-05 05:43:05,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:43:05,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:43:05,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:05,546 INFO L225 Difference]: With dead ends: 288 [2021-06-05 05:43:05,546 INFO L226 Difference]: Without dead ends: 257 [2021-06-05 05:43:05,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:43:05,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-05 05:43:05,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 223. [2021-06-05 05:43:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.045045045045045) internal successors, (454), 222 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:05,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 454 transitions. [2021-06-05 05:43:05,556 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 454 transitions. Word has length 23 [2021-06-05 05:43:05,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:05,556 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 454 transitions. [2021-06-05 05:43:05,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:05,556 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 454 transitions. [2021-06-05 05:43:05,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:43:05,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:05,561 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:05,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 05:43:05,780 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:05,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:05,780 INFO L82 PathProgramCache]: Analyzing trace with hash 543374211, now seen corresponding path program 2 times [2021-06-05 05:43:05,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:05,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714113032] [2021-06-05 05:43:05,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:05,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:05,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714113032] [2021-06-05 05:43:05,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714113032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:05,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325922824] [2021-06-05 05:43:05,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:05,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:43:05,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:05,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:43:05,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:06,026 INFO L388 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 [2021-06-05 05:43:06,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:06,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:06,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:06,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:43:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:06,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325922824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:06,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:06,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-06-05 05:43:06,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595608781] [2021-06-05 05:43:06,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:43:06,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:06,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:43:06,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:43:06,107 INFO L87 Difference]: Start difference. First operand 223 states and 454 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:06,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:06,545 INFO L93 Difference]: Finished difference Result 313 states and 606 transitions. [2021-06-05 05:43:06,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:43:06,545 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:43:06,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:06,546 INFO L225 Difference]: With dead ends: 313 [2021-06-05 05:43:06,546 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 05:43:06,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 396.0ms TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:43:06,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 05:43:06,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 246. [2021-06-05 05:43:06,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0081632653061225) internal successors, (492), 245 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:06,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 492 transitions. [2021-06-05 05:43:06,551 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 492 transitions. Word has length 26 [2021-06-05 05:43:06,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:06,552 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 492 transitions. [2021-06-05 05:43:06,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:06,552 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 492 transitions. [2021-06-05 05:43:06,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:43:06,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:06,552 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:06,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:06,765 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:06,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:06,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1138730303, now seen corresponding path program 3 times [2021-06-05 05:43:06,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:06,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813777737] [2021-06-05 05:43:06,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:06,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:06,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813777737] [2021-06-05 05:43:06,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813777737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:06,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360897487] [2021-06-05 05:43:06,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:06,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:43:06,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:06,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:43:06,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:07,074 INFO L388 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 [2021-06-05 05:43:07,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:07,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:07,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:07,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:43:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:07,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360897487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:07,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:07,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:43:07,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472445191] [2021-06-05 05:43:07,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:43:07,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:07,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:43:07,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:43:07,163 INFO L87 Difference]: Start difference. First operand 246 states and 492 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:07,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:07,683 INFO L93 Difference]: Finished difference Result 346 states and 668 transitions. [2021-06-05 05:43:07,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:43:07,684 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:43:07,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:07,685 INFO L225 Difference]: With dead ends: 346 [2021-06-05 05:43:07,685 INFO L226 Difference]: Without dead ends: 314 [2021-06-05 05:43:07,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 464.5ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:43:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-06-05 05:43:07,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 252. [2021-06-05 05:43:07,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.0199203187250996) internal successors, (507), 251 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:07,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 507 transitions. [2021-06-05 05:43:07,691 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 507 transitions. Word has length 26 [2021-06-05 05:43:07,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:07,691 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 507 transitions. [2021-06-05 05:43:07,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:07,691 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 507 transitions. [2021-06-05 05:43:07,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:43:07,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:07,692 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:07,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:07,897 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:07,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:07,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1169241475, now seen corresponding path program 4 times [2021-06-05 05:43:07,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:07,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420458381] [2021-06-05 05:43:07,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:08,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:08,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420458381] [2021-06-05 05:43:08,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420458381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:08,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406998613] [2021-06-05 05:43:08,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:08,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:43:08,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:08,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:43:08,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:08,172 INFO L388 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 [2021-06-05 05:43:08,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:08,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:08,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:08,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:43:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:08,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406998613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:08,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:08,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:43:08,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024831301] [2021-06-05 05:43:08,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:43:08,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:08,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:43:08,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:43:08,300 INFO L87 Difference]: Start difference. First operand 252 states and 507 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:08,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:08,817 INFO L93 Difference]: Finished difference Result 365 states and 705 transitions. [2021-06-05 05:43:08,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:43:08,817 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:43:08,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:08,819 INFO L225 Difference]: With dead ends: 365 [2021-06-05 05:43:08,819 INFO L226 Difference]: Without dead ends: 333 [2021-06-05 05:43:08,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 456.3ms TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:43:08,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-05 05:43:08,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 253. [2021-06-05 05:43:08,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.0198412698412698) internal successors, (509), 252 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:08,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 509 transitions. [2021-06-05 05:43:08,826 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 509 transitions. Word has length 26 [2021-06-05 05:43:08,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:08,827 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 509 transitions. [2021-06-05 05:43:08,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:08,827 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 509 transitions. [2021-06-05 05:43:08,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:43:08,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:08,827 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:09,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 05:43:09,044 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:09,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:09,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1699483455, now seen corresponding path program 5 times [2021-06-05 05:43:09,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:09,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427629916] [2021-06-05 05:43:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:09,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:09,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427629916] [2021-06-05 05:43:09,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427629916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:09,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729042548] [2021-06-05 05:43:09,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:09,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:43:09,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:09,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:43:09,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:09,318 INFO L388 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 7 [2021-06-05 05:43:09,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:09,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:09,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:09,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 05:43:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:09,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729042548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:09,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:09,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 05:43:09,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883802401] [2021-06-05 05:43:09,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:43:09,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:09,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:43:09,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:43:09,455 INFO L87 Difference]: Start difference. First operand 253 states and 509 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:10,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:10,091 INFO L93 Difference]: Finished difference Result 405 states and 784 transitions. [2021-06-05 05:43:10,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:43:10,092 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:43:10,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:10,093 INFO L225 Difference]: With dead ends: 405 [2021-06-05 05:43:10,093 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 05:43:10,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 509.2ms TimeCoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:43:10,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 05:43:10,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 257. [2021-06-05 05:43:10,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.015625) internal successors, (516), 256 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:10,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 516 transitions. [2021-06-05 05:43:10,099 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 516 transitions. Word has length 26 [2021-06-05 05:43:10,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:10,099 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 516 transitions. [2021-06-05 05:43:10,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:10,099 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 516 transitions. [2021-06-05 05:43:10,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:43:10,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:10,100 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:10,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:10,316 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:10,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:10,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1848637673, now seen corresponding path program 6 times [2021-06-05 05:43:10,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:10,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055806980] [2021-06-05 05:43:10,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:10,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:10,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055806980] [2021-06-05 05:43:10,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055806980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:10,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653355418] [2021-06-05 05:43:10,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:10,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:43:10,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:10,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 05:43:10,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:10,567 INFO L388 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 7 [2021-06-05 05:43:10,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:10,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:10,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:10,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 05:43:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:10,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653355418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:10,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:10,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:43:10,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834885855] [2021-06-05 05:43:10,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:43:10,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:10,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:43:10,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:43:10,713 INFO L87 Difference]: Start difference. First operand 257 states and 516 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:11,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:11,137 INFO L93 Difference]: Finished difference Result 321 states and 632 transitions. [2021-06-05 05:43:11,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:43:11,138 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:43:11,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:11,139 INFO L225 Difference]: With dead ends: 321 [2021-06-05 05:43:11,139 INFO L226 Difference]: Without dead ends: 293 [2021-06-05 05:43:11,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 458.1ms TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:43:11,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-06-05 05:43:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 260. [2021-06-05 05:43:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.011583011583012) internal successors, (521), 259 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:11,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 521 transitions. [2021-06-05 05:43:11,144 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 521 transitions. Word has length 26 [2021-06-05 05:43:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:11,144 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 521 transitions. [2021-06-05 05:43:11,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:11,144 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 521 transitions. [2021-06-05 05:43:11,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:43:11,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:11,145 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:11,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:11,360 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:11,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:11,361 INFO L82 PathProgramCache]: Analyzing trace with hash -2081701755, now seen corresponding path program 7 times [2021-06-05 05:43:11,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:11,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461311266] [2021-06-05 05:43:11,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:11,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:11,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461311266] [2021-06-05 05:43:11,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461311266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:11,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031432407] [2021-06-05 05:43:11,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:11,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:43:11,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:11,607 INFO L388 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 7 [2021-06-05 05:43:11,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:11,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:11,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:11,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 05:43:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:11,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031432407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:11,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:11,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:43:11,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185758473] [2021-06-05 05:43:11,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:43:11,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:11,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:43:11,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:43:11,685 INFO L87 Difference]: Start difference. First operand 260 states and 521 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:12,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:12,040 INFO L93 Difference]: Finished difference Result 349 states and 677 transitions. [2021-06-05 05:43:12,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:43:12,041 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:43:12,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:12,042 INFO L225 Difference]: With dead ends: 349 [2021-06-05 05:43:12,042 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 05:43:12,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 382.5ms TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:43:12,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 05:43:12,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 269. [2021-06-05 05:43:12,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.0186567164179103) internal successors, (541), 268 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:12,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 541 transitions. [2021-06-05 05:43:12,047 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 541 transitions. Word has length 26 [2021-06-05 05:43:12,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:12,047 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 541 transitions. [2021-06-05 05:43:12,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:12,048 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 541 transitions. [2021-06-05 05:43:12,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:43:12,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:12,048 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:12,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 05:43:12,264 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:12,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:12,265 INFO L82 PathProgramCache]: Analyzing trace with hash 226270023, now seen corresponding path program 8 times [2021-06-05 05:43:12,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:12,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369974158] [2021-06-05 05:43:12,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:12,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:12,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369974158] [2021-06-05 05:43:12,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369974158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:12,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097083748] [2021-06-05 05:43:12,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:12,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:43:12,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:12,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:43:12,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:12,521 INFO L388 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 [2021-06-05 05:43:12,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:12,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:12,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:12,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:43:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:12,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097083748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:12,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:12,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:43:12,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484717517] [2021-06-05 05:43:12,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:43:12,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:12,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:43:12,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:43:12,644 INFO L87 Difference]: Start difference. First operand 269 states and 541 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:13,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:13,090 INFO L93 Difference]: Finished difference Result 386 states and 744 transitions. [2021-06-05 05:43:13,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:43:13,091 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:43:13,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:13,092 INFO L225 Difference]: With dead ends: 386 [2021-06-05 05:43:13,092 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 05:43:13,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 405.2ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:43:13,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 05:43:13,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 270. [2021-06-05 05:43:13,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.0185873605947955) internal successors, (543), 269 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:13,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 543 transitions. [2021-06-05 05:43:13,097 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 543 transitions. Word has length 26 [2021-06-05 05:43:13,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:13,097 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 543 transitions. [2021-06-05 05:43:13,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:13,097 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 543 transitions. [2021-06-05 05:43:13,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:43:13,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:13,098 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:13,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 05:43:13,305 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:13,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:13,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1652512389, now seen corresponding path program 9 times [2021-06-05 05:43:13,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:13,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450730608] [2021-06-05 05:43:13,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:13,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:13,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450730608] [2021-06-05 05:43:13,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450730608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:13,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091225762] [2021-06-05 05:43:13,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:13,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:43:13,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:13,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:43:13,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:13,519 INFO L388 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 7 [2021-06-05 05:43:13,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:13,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:13,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:13,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 05:43:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:13,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091225762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:13,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:13,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:43:13,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70446105] [2021-06-05 05:43:13,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:43:13,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:13,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:43:13,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:43:13,632 INFO L87 Difference]: Start difference. First operand 270 states and 543 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:14,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:14,148 INFO L93 Difference]: Finished difference Result 429 states and 828 transitions. [2021-06-05 05:43:14,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:43:14,148 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:43:14,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:14,149 INFO L225 Difference]: With dead ends: 429 [2021-06-05 05:43:14,149 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 05:43:14,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 456.9ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:43:14,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 05:43:14,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 267. [2021-06-05 05:43:14,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.007518796992481) internal successors, (534), 266 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:14,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 534 transitions. [2021-06-05 05:43:14,155 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 534 transitions. Word has length 26 [2021-06-05 05:43:14,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:14,155 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 534 transitions. [2021-06-05 05:43:14,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:14,155 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 534 transitions. [2021-06-05 05:43:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:43:14,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:14,156 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:14,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 05:43:14,361 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:14,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:14,361 INFO L82 PathProgramCache]: Analyzing trace with hash 632062879, now seen corresponding path program 10 times [2021-06-05 05:43:14,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:14,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491670765] [2021-06-05 05:43:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:14,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:14,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491670765] [2021-06-05 05:43:14,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491670765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:14,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174117815] [2021-06-05 05:43:14,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:43:14,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:43:14,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:14,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:43:14,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:14,577 INFO L388 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 [2021-06-05 05:43:14,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:14,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:14,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:14,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:43:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:14,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174117815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:14,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:14,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:43:14,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413031731] [2021-06-05 05:43:14,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:43:14,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:14,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:43:14,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:43:14,699 INFO L87 Difference]: Start difference. First operand 267 states and 534 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:15,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:15,115 INFO L93 Difference]: Finished difference Result 331 states and 650 transitions. [2021-06-05 05:43:15,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:43:15,116 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 05:43:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:15,117 INFO L225 Difference]: With dead ends: 331 [2021-06-05 05:43:15,117 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 05:43:15,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 439.3ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:43:15,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 05:43:15,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 263. [2021-06-05 05:43:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.0076335877862594) internal successors, (526), 262 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 526 transitions. [2021-06-05 05:43:15,122 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 526 transitions. Word has length 26 [2021-06-05 05:43:15,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:15,122 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 526 transitions. [2021-06-05 05:43:15,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:15,122 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 526 transitions. [2021-06-05 05:43:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:43:15,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:15,122 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:15,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:15,338 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:15,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:15,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1575102459, now seen corresponding path program 11 times [2021-06-05 05:43:15,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:15,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205058021] [2021-06-05 05:43:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:15,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:15,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205058021] [2021-06-05 05:43:15,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205058021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:15,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601969621] [2021-06-05 05:43:15,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:15,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:43:15,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:15,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:43:15,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:15,591 INFO L388 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 [2021-06-05 05:43:15,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:15,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:15,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:15,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:43:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:15,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601969621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:15,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:15,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:43:15,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008755289] [2021-06-05 05:43:15,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:43:15,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:15,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:43:15,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:43:15,700 INFO L87 Difference]: Start difference. First operand 263 states and 526 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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) [2021-06-05 05:43:16,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:16,150 INFO L93 Difference]: Finished difference Result 355 states and 687 transitions. [2021-06-05 05:43:16,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:43:16,150 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 26 [2021-06-05 05:43:16,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:16,151 INFO L225 Difference]: With dead ends: 355 [2021-06-05 05:43:16,151 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 05:43:16,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 452.8ms TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:43:16,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 05:43:16,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 275. [2021-06-05 05:43:16,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.010948905109489) internal successors, (551), 274 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:16,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 551 transitions. [2021-06-05 05:43:16,156 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 551 transitions. Word has length 26 [2021-06-05 05:43:16,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:16,156 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 551 transitions. [2021-06-05 05:43:16,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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) [2021-06-05 05:43:16,156 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 551 transitions. [2021-06-05 05:43:16,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:43:16,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:16,157 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:16,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 05:43:16,373 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:16,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:16,374 INFO L82 PathProgramCache]: Analyzing trace with hash -411893059, now seen corresponding path program 12 times [2021-06-05 05:43:16,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:16,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889353245] [2021-06-05 05:43:16,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:16,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:16,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889353245] [2021-06-05 05:43:16,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889353245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:16,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916108100] [2021-06-05 05:43:16,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:16,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:43:16,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:16,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:43:16,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:16,604 INFO L388 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 [2021-06-05 05:43:16,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:16,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:16,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:16,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:43:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:16,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916108100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:16,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:16,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:43:16,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119777405] [2021-06-05 05:43:16,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:43:16,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:16,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:43:16,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:43:16,708 INFO L87 Difference]: Start difference. First operand 275 states and 551 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-06-05 05:43:17,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:17,133 INFO L93 Difference]: Finished difference Result 392 states and 754 transitions. [2021-06-05 05:43:17,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:43:17,133 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-06-05 05:43:17,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:17,134 INFO L225 Difference]: With dead ends: 392 [2021-06-05 05:43:17,134 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 05:43:17,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 388.7ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:43:17,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 05:43:17,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 276. [2021-06-05 05:43:17,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.0109090909090908) internal successors, (553), 275 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:17,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 553 transitions. [2021-06-05 05:43:17,139 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 553 transitions. Word has length 26 [2021-06-05 05:43:17,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:17,140 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 553 transitions. [2021-06-05 05:43:17,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-06-05 05:43:17,140 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 553 transitions. [2021-06-05 05:43:17,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:43:17,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:17,140 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:17,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 05:43:17,353 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:17,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:17,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1014349307, now seen corresponding path program 13 times [2021-06-05 05:43:17,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:17,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005085628] [2021-06-05 05:43:17,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:17,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:17,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005085628] [2021-06-05 05:43:17,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005085628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:17,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137392245] [2021-06-05 05:43:17,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:17,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:43:17,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:17,575 INFO L388 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 [2021-06-05 05:43:17,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:17,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:17,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:17,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:43:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:17,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137392245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:17,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:17,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:43:17,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395008892] [2021-06-05 05:43:17,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:43:17,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:17,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:43:17,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:43:17,670 INFO L87 Difference]: Start difference. First operand 276 states and 553 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-06-05 05:43:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:18,236 INFO L93 Difference]: Finished difference Result 435 states and 838 transitions. [2021-06-05 05:43:18,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:43:18,236 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-06-05 05:43:18,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:18,238 INFO L225 Difference]: With dead ends: 435 [2021-06-05 05:43:18,239 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 05:43:18,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 468.7ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:43:18,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 05:43:18,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 273. [2021-06-05 05:43:18,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.0) internal successors, (544), 272 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:18,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 544 transitions. [2021-06-05 05:43:18,244 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 544 transitions. Word has length 26 [2021-06-05 05:43:18,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:18,244 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 544 transitions. [2021-06-05 05:43:18,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-06-05 05:43:18,244 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 544 transitions. [2021-06-05 05:43:18,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:43:18,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:18,244 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:18,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:18,460 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:18,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:18,460 INFO L82 PathProgramCache]: Analyzing trace with hash -6100203, now seen corresponding path program 14 times [2021-06-05 05:43:18,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:18,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935368915] [2021-06-05 05:43:18,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:18,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:18,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935368915] [2021-06-05 05:43:18,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935368915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:18,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538346806] [2021-06-05 05:43:18,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:18,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:43:18,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:18,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:43:18,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:18,693 INFO L388 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 [2021-06-05 05:43:18,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:18,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:18,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:18,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:43:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:18,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538346806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:18,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:18,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:43:18,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808346377] [2021-06-05 05:43:18,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:43:18,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:18,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:43:18,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:43:18,824 INFO L87 Difference]: Start difference. First operand 273 states and 544 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-06-05 05:43:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:19,270 INFO L93 Difference]: Finished difference Result 337 states and 660 transitions. [2021-06-05 05:43:19,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:43:19,270 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-06-05 05:43:19,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:19,271 INFO L225 Difference]: With dead ends: 337 [2021-06-05 05:43:19,271 INFO L226 Difference]: Without dead ends: 309 [2021-06-05 05:43:19,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 476.3ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:43:19,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-05 05:43:19,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 266. [2021-06-05 05:43:19,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.0037735849056606) internal successors, (531), 265 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:19,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 531 transitions. [2021-06-05 05:43:19,276 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 531 transitions. Word has length 26 [2021-06-05 05:43:19,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:19,277 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 531 transitions. [2021-06-05 05:43:19,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-06-05 05:43:19,277 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 531 transitions. [2021-06-05 05:43:19,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:43:19,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:19,277 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:19,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:19,494 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:19,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:19,494 INFO L82 PathProgramCache]: Analyzing trace with hash 942965637, now seen corresponding path program 15 times [2021-06-05 05:43:19,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:19,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719940962] [2021-06-05 05:43:19,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:19,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:19,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719940962] [2021-06-05 05:43:19,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719940962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:19,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879062268] [2021-06-05 05:43:19,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:43:19,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:43:19,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:19,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:43:19,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:19,771 INFO L388 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 [2021-06-05 05:43:19,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:19,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:19,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:19,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:43:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:19,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879062268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:19,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:19,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:43:19,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22031789] [2021-06-05 05:43:19,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:43:19,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:19,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:43:19,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:43:19,888 INFO L87 Difference]: Start difference. First operand 266 states and 531 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-06-05 05:43:20,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:20,301 INFO L93 Difference]: Finished difference Result 343 states and 661 transitions. [2021-06-05 05:43:20,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:43:20,302 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-06-05 05:43:20,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:20,303 INFO L225 Difference]: With dead ends: 343 [2021-06-05 05:43:20,303 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 05:43:20,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 426.8ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:43:20,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 05:43:20,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 263. [2021-06-05 05:43:20,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.00381679389313) internal successors, (525), 262 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:20,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 525 transitions. [2021-06-05 05:43:20,307 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 525 transitions. Word has length 26 [2021-06-05 05:43:20,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:20,307 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 525 transitions. [2021-06-05 05:43:20,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-06-05 05:43:20,307 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 525 transitions. [2021-06-05 05:43:20,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:43:20,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:20,308 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:20,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:20,521 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:20,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:20,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1044029881, now seen corresponding path program 16 times [2021-06-05 05:43:20,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:20,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500941198] [2021-06-05 05:43:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:20,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:20,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500941198] [2021-06-05 05:43:20,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500941198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:20,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778722211] [2021-06-05 05:43:20,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:20,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:43:20,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:20,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:43:20,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:20,730 INFO L388 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 [2021-06-05 05:43:20,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:20,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:20,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:20,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:43:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:20,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778722211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:20,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:20,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:43:20,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210774928] [2021-06-05 05:43:20,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:43:20,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:20,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:43:20,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:43:20,848 INFO L87 Difference]: Start difference. First operand 263 states and 525 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-06-05 05:43:21,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:21,285 INFO L93 Difference]: Finished difference Result 378 states and 724 transitions. [2021-06-05 05:43:21,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:43:21,285 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-06-05 05:43:21,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:21,286 INFO L225 Difference]: With dead ends: 378 [2021-06-05 05:43:21,286 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 05:43:21,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 424.7ms TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:43:21,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 05:43:21,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 264. [2021-06-05 05:43:21,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.0038022813688214) internal successors, (527), 263 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 527 transitions. [2021-06-05 05:43:21,291 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 527 transitions. Word has length 26 [2021-06-05 05:43:21,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:21,291 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 527 transitions. [2021-06-05 05:43:21,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-06-05 05:43:21,291 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 527 transitions. [2021-06-05 05:43:21,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:43:21,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:21,291 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:21,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 05:43:21,505 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:21,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:21,505 INFO L82 PathProgramCache]: Analyzing trace with hash 382212485, now seen corresponding path program 17 times [2021-06-05 05:43:21,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:21,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725565410] [2021-06-05 05:43:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:21,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:21,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725565410] [2021-06-05 05:43:21,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725565410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:21,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424100552] [2021-06-05 05:43:21,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:43:21,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:43:21,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:21,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:43:21,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:21,750 INFO L388 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 [2021-06-05 05:43:21,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:21,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:21,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:21,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:43:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:21,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424100552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:21,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:21,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:43:21,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659048334] [2021-06-05 05:43:21,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:43:21,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:21,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:43:21,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:43:21,871 INFO L87 Difference]: Start difference. First operand 264 states and 527 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-06-05 05:43:22,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:22,450 INFO L93 Difference]: Finished difference Result 410 states and 786 transitions. [2021-06-05 05:43:22,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:43:22,451 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-06-05 05:43:22,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:22,452 INFO L225 Difference]: With dead ends: 410 [2021-06-05 05:43:22,452 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 05:43:22,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 511.7ms TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:43:22,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 05:43:22,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 255. [2021-06-05 05:43:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.9921259842519685) internal successors, (506), 254 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:22,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 506 transitions. [2021-06-05 05:43:22,457 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 506 transitions. Word has length 26 [2021-06-05 05:43:22,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:22,457 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 506 transitions. [2021-06-05 05:43:22,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-06-05 05:43:22,457 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 506 transitions. [2021-06-05 05:43:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 05:43:22,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:22,457 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:22,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 05:43:22,673 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:22,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:22,673 INFO L82 PathProgramCache]: Analyzing trace with hash -638237025, now seen corresponding path program 18 times [2021-06-05 05:43:22,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:22,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72258612] [2021-06-05 05:43:22,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:22,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:22,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72258612] [2021-06-05 05:43:22,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72258612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:22,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005352794] [2021-06-05 05:43:22,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:22,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:43:22,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:22,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:43:22,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:22,854 INFO L388 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 [2021-06-05 05:43:22,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:22,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:22,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:22,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:43:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:22,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005352794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:22,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:22,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 05:43:22,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582661312] [2021-06-05 05:43:22,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:43:22,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:22,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:43:22,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:43:22,989 INFO L87 Difference]: Start difference. First operand 255 states and 506 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-06-05 05:43:23,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:23,487 INFO L93 Difference]: Finished difference Result 307 states and 598 transitions. [2021-06-05 05:43:23,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:43:23,487 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-06-05 05:43:23,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:23,488 INFO L225 Difference]: With dead ends: 307 [2021-06-05 05:43:23,488 INFO L226 Difference]: Without dead ends: 279 [2021-06-05 05:43:23,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 455.0ms TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:43:23,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-06-05 05:43:23,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 233. [2021-06-05 05:43:23,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.0) internal successors, (464), 232 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:23,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 464 transitions. [2021-06-05 05:43:23,491 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 464 transitions. Word has length 26 [2021-06-05 05:43:23,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:23,491 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 464 transitions. [2021-06-05 05:43:23,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-06-05 05:43:23,491 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 464 transitions. [2021-06-05 05:43:23,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:43:23,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:23,492 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:23,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:23,705 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:23,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:23,705 INFO L82 PathProgramCache]: Analyzing trace with hash 480945784, now seen corresponding path program 19 times [2021-06-05 05:43:23,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:23,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467677529] [2021-06-05 05:43:23,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:23,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:23,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467677529] [2021-06-05 05:43:23,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467677529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:23,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032346007] [2021-06-05 05:43:23,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:23,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:43:23,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:23,820 INFO L388 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 [2021-06-05 05:43:23,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:23,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:23,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:23,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:43:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:23,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032346007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:23,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:23,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 05:43:23,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220729616] [2021-06-05 05:43:23,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:43:23,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:23,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:43:23,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:43:23,828 INFO L87 Difference]: Start difference. First operand 233 states and 464 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:24,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:24,009 INFO L93 Difference]: Finished difference Result 362 states and 698 transitions. [2021-06-05 05:43:24,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:43:24,009 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:43:24,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:24,010 INFO L225 Difference]: With dead ends: 362 [2021-06-05 05:43:24,010 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 05:43:24,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:43:24,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 05:43:24,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 238. [2021-06-05 05:43:24,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.970464135021097) internal successors, (467), 237 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:24,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 467 transitions. [2021-06-05 05:43:24,014 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 467 transitions. Word has length 29 [2021-06-05 05:43:24,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:24,014 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 467 transitions. [2021-06-05 05:43:24,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:24,014 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 467 transitions. [2021-06-05 05:43:24,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:43:24,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:24,014 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:24,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 05:43:24,221 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:24,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:24,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1371755552, now seen corresponding path program 20 times [2021-06-05 05:43:24,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:24,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912016776] [2021-06-05 05:43:24,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:24,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:24,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912016776] [2021-06-05 05:43:24,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912016776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:24,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431336436] [2021-06-05 05:43:24,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:24,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:43:24,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:24,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:43:24,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:24,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431336436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:24,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:24,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:43:24,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000006685] [2021-06-05 05:43:24,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:43:24,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:24,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:43:24,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:43:24,318 INFO L87 Difference]: Start difference. First operand 238 states and 467 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:24,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:24,331 INFO L93 Difference]: Finished difference Result 534 states and 1045 transitions. [2021-06-05 05:43:24,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:43:24,331 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:43:24,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:24,333 INFO L225 Difference]: With dead ends: 534 [2021-06-05 05:43:24,333 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 05:43:24,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:43:24,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 05:43:24,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 411. [2021-06-05 05:43:24,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0634146341463415) internal successors, (846), 410 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 846 transitions. [2021-06-05 05:43:24,343 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 846 transitions. Word has length 30 [2021-06-05 05:43:24,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:24,343 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 846 transitions. [2021-06-05 05:43:24,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:24,344 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 846 transitions. [2021-06-05 05:43:24,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:43:24,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:24,344 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:24,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:24,560 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:24,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:24,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1245561707, now seen corresponding path program 21 times [2021-06-05 05:43:24,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:24,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756781377] [2021-06-05 05:43:24,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:24,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:24,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756781377] [2021-06-05 05:43:24,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756781377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:24,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341930255] [2021-06-05 05:43:24,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:24,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:43:24,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:24,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:43:24,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:24,969 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:43:24,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:43:24,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:24,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:24,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:24,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:43:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:25,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341930255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:25,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:25,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 26 [2021-06-05 05:43:25,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261730813] [2021-06-05 05:43:25,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:43:25,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:25,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:43:25,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:43:25,066 INFO L87 Difference]: Start difference. First operand 411 states and 846 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 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) [2021-06-05 05:43:25,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:25,734 INFO L93 Difference]: Finished difference Result 550 states and 1089 transitions. [2021-06-05 05:43:25,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:43:25,735 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 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 33 [2021-06-05 05:43:25,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:25,736 INFO L225 Difference]: With dead ends: 550 [2021-06-05 05:43:25,736 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 05:43:25,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 673.7ms TimeCoverageRelationStatistics Valid=181, Invalid=1711, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:43:25,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 05:43:25,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 428. [2021-06-05 05:43:25,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.0468384074941453) internal successors, (874), 427 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:25,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 874 transitions. [2021-06-05 05:43:25,741 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 874 transitions. Word has length 33 [2021-06-05 05:43:25,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:25,742 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 874 transitions. [2021-06-05 05:43:25,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 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) [2021-06-05 05:43:25,742 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 874 transitions. [2021-06-05 05:43:25,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:43:25,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:25,742 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:25,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 05:43:25,958 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:25,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:25,959 INFO L82 PathProgramCache]: Analyzing trace with hash -482243373, now seen corresponding path program 22 times [2021-06-05 05:43:25,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:25,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745097048] [2021-06-05 05:43:25,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:26,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:26,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745097048] [2021-06-05 05:43:26,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745097048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:26,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129180278] [2021-06-05 05:43:26,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:26,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:43:26,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:26,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:43:26,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:26,391 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:43:26,392 INFO L388 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 13 [2021-06-05 05:43:26,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:26,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:26,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:26,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:43:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:26,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129180278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:26,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:26,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-06-05 05:43:26,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713396269] [2021-06-05 05:43:26,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:43:26,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:26,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:43:26,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:43:26,506 INFO L87 Difference]: Start difference. First operand 428 states and 874 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:27,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:27,426 INFO L93 Difference]: Finished difference Result 574 states and 1136 transitions. [2021-06-05 05:43:27,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:43:27,427 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:43:27,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:27,428 INFO L225 Difference]: With dead ends: 574 [2021-06-05 05:43:27,428 INFO L226 Difference]: Without dead ends: 526 [2021-06-05 05:43:27,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 813.4ms TimeCoverageRelationStatistics Valid=204, Invalid=1958, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:43:27,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-05 05:43:27,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 434. [2021-06-05 05:43:27,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.0531177829099305) internal successors, (889), 433 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:27,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 889 transitions. [2021-06-05 05:43:27,434 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 889 transitions. Word has length 33 [2021-06-05 05:43:27,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:27,434 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 889 transitions. [2021-06-05 05:43:27,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:27,434 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 889 transitions. [2021-06-05 05:43:27,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:43:27,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:27,435 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:27,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:27,645 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:27,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:27,645 INFO L82 PathProgramCache]: Analyzing trace with hash 797128341, now seen corresponding path program 23 times [2021-06-05 05:43:27,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:27,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530106433] [2021-06-05 05:43:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:27,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:27,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530106433] [2021-06-05 05:43:27,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530106433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:27,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304530753] [2021-06-05 05:43:27,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:27,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:43:27,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:27,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:43:27,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:28,106 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:43:28,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:43:28,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:28,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:28,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:28,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:43:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:28,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304530753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:28,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:28,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-05 05:43:28,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393918756] [2021-06-05 05:43:28,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:43:28,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:28,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:43:28,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:43:28,271 INFO L87 Difference]: Start difference. First operand 434 states and 889 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:29,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:29,307 INFO L93 Difference]: Finished difference Result 599 states and 1183 transitions. [2021-06-05 05:43:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:43:29,307 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:43:29,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:29,309 INFO L225 Difference]: With dead ends: 599 [2021-06-05 05:43:29,309 INFO L226 Difference]: Without dead ends: 551 [2021-06-05 05:43:29,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 819.5ms TimeCoverageRelationStatistics Valid=224, Invalid=2226, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:43:29,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-06-05 05:43:29,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 435. [2021-06-05 05:43:29,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.052995391705069) internal successors, (891), 434 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 891 transitions. [2021-06-05 05:43:29,314 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 891 transitions. Word has length 33 [2021-06-05 05:43:29,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:29,315 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 891 transitions. [2021-06-05 05:43:29,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:29,315 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 891 transitions. [2021-06-05 05:43:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:43:29,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:29,315 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:29,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 05:43:29,531 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:29,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:29,532 INFO L82 PathProgramCache]: Analyzing trace with hash -2112216365, now seen corresponding path program 24 times [2021-06-05 05:43:29,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:29,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036418983] [2021-06-05 05:43:29,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:29,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:29,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036418983] [2021-06-05 05:43:29,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036418983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:29,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700144984] [2021-06-05 05:43:29,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:29,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:43:29,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:29,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:43:29,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:29,972 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:43:29,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:43:29,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:29,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:29,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:29,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:43:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:30,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700144984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:30,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:30,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-06-05 05:43:30,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807468717] [2021-06-05 05:43:30,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:43:30,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:30,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:43:30,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:43:30,096 INFO L87 Difference]: Start difference. First operand 435 states and 891 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:31,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:31,066 INFO L93 Difference]: Finished difference Result 637 states and 1261 transitions. [2021-06-05 05:43:31,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:43:31,066 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:43:31,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:31,067 INFO L225 Difference]: With dead ends: 637 [2021-06-05 05:43:31,067 INFO L226 Difference]: Without dead ends: 589 [2021-06-05 05:43:31,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 863.9ms TimeCoverageRelationStatistics Valid=214, Invalid=2138, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:43:31,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-05 05:43:31,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 439. [2021-06-05 05:43:31,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.0525114155251143) internal successors, (899), 438 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:31,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 899 transitions. [2021-06-05 05:43:31,073 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 899 transitions. Word has length 33 [2021-06-05 05:43:31,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:31,074 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 899 transitions. [2021-06-05 05:43:31,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:31,074 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 899 transitions. [2021-06-05 05:43:31,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:43:31,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:31,074 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:31,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:31,289 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:31,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:31,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1541640341, now seen corresponding path program 25 times [2021-06-05 05:43:31,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:31,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701747334] [2021-06-05 05:43:31,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:31,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:31,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701747334] [2021-06-05 05:43:31,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701747334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:31,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703647411] [2021-06-05 05:43:31,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:31,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:43:31,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:31,704 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:43:31,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:43:31,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:31,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:31,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:31,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:43:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:31,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703647411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:31,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:31,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-06-05 05:43:31,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030684263] [2021-06-05 05:43:31,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:43:31,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:31,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:43:31,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:43:31,831 INFO L87 Difference]: Start difference. First operand 439 states and 899 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:32,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:32,961 INFO L93 Difference]: Finished difference Result 678 states and 1346 transitions. [2021-06-05 05:43:32,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:43:32,961 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:43:32,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:32,963 INFO L225 Difference]: With dead ends: 678 [2021-06-05 05:43:32,963 INFO L226 Difference]: Without dead ends: 646 [2021-06-05 05:43:32,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 981.9ms TimeCoverageRelationStatistics Valid=282, Invalid=2798, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:43:32,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-06-05 05:43:32,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 440. [2021-06-05 05:43:32,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.052391799544419) internal successors, (901), 439 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:32,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 901 transitions. [2021-06-05 05:43:32,969 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 901 transitions. Word has length 33 [2021-06-05 05:43:32,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:32,969 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 901 transitions. [2021-06-05 05:43:32,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:32,969 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 901 transitions. [2021-06-05 05:43:32,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:43:32,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:32,970 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:33,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 05:43:33,185 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:33,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:33,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1327084589, now seen corresponding path program 26 times [2021-06-05 05:43:33,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:33,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226207366] [2021-06-05 05:43:33,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:33,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:33,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226207366] [2021-06-05 05:43:33,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226207366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:33,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487402697] [2021-06-05 05:43:33,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:33,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:43:33,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:33,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:43:33,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:33,613 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:43:33,613 INFO L388 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 13 [2021-06-05 05:43:33,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:33,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:33,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:33,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:43:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:33,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487402697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:33,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:33,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-06-05 05:43:33,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587338160] [2021-06-05 05:43:33,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:43:33,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:33,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:43:33,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:43:33,740 INFO L87 Difference]: Start difference. First operand 440 states and 901 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:35,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:35,287 INFO L93 Difference]: Finished difference Result 758 states and 1504 transitions. [2021-06-05 05:43:35,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:43:35,287 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:43:35,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:35,289 INFO L225 Difference]: With dead ends: 758 [2021-06-05 05:43:35,289 INFO L226 Difference]: Without dead ends: 714 [2021-06-05 05:43:35,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1155.8ms TimeCoverageRelationStatistics Valid=335, Invalid=3571, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:43:35,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-06-05 05:43:35,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 447. [2021-06-05 05:43:35,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 2.0493273542600896) internal successors, (914), 446 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:35,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 914 transitions. [2021-06-05 05:43:35,295 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 914 transitions. Word has length 33 [2021-06-05 05:43:35,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:35,295 INFO L482 AbstractCegarLoop]: Abstraction has 447 states and 914 transitions. [2021-06-05 05:43:35,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:35,295 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 914 transitions. [2021-06-05 05:43:35,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:43:35,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:35,296 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:35,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:35,512 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:35,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:35,512 INFO L82 PathProgramCache]: Analyzing trace with hash -293375473, now seen corresponding path program 27 times [2021-06-05 05:43:35,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:35,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639885709] [2021-06-05 05:43:35,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:35,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:35,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:35,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639885709] [2021-06-05 05:43:35,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639885709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:35,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839481166] [2021-06-05 05:43:35,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:35,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:43:35,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:35,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:43:35,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:35,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:35,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:43:35,980 INFO L388 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 27 treesize of output 13 [2021-06-05 05:43:35,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:35,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:35,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:35,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-06-05 05:43:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:36,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839481166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:36,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:36,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:43:36,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920328045] [2021-06-05 05:43:36,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:43:36,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:36,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:43:36,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:43:36,175 INFO L87 Difference]: Start difference. First operand 447 states and 914 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:37,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:37,018 INFO L93 Difference]: Finished difference Result 566 states and 1143 transitions. [2021-06-05 05:43:37,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:43:37,019 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:43:37,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:37,020 INFO L225 Difference]: With dead ends: 566 [2021-06-05 05:43:37,020 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 05:43:37,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 786.4ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:43:37,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 05:43:37,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 450. [2021-06-05 05:43:37,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.046770601336303) internal successors, (919), 449 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:37,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 919 transitions. [2021-06-05 05:43:37,025 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 919 transitions. Word has length 33 [2021-06-05 05:43:37,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:37,026 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 919 transitions. [2021-06-05 05:43:37,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:37,026 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 919 transitions. [2021-06-05 05:43:37,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:43:37,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:37,026 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:37,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 05:43:37,241 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:37,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:37,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1738305687, now seen corresponding path program 28 times [2021-06-05 05:43:37,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:37,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969501558] [2021-06-05 05:43:37,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:37,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:37,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969501558] [2021-06-05 05:43:37,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969501558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:37,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054272543] [2021-06-05 05:43:37,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:37,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:43:37,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:37,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:43:37,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:37,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:37,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:37,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:43:37,770 INFO L388 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 27 treesize of output 13 [2021-06-05 05:43:37,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:37,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:37,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:37,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:43:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:37,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054272543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:37,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:37,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:43:37,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158432942] [2021-06-05 05:43:37,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:43:37,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:37,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:43:37,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:43:37,869 INFO L87 Difference]: Start difference. First operand 450 states and 919 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:38,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:38,736 INFO L93 Difference]: Finished difference Result 581 states and 1153 transitions. [2021-06-05 05:43:38,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:43:38,736 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:43:38,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:38,738 INFO L225 Difference]: With dead ends: 581 [2021-06-05 05:43:38,738 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 05:43:38,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 764.3ms TimeCoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:43:38,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 05:43:38,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 459. [2021-06-05 05:43:38,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.052401746724891) internal successors, (940), 458 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:38,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 940 transitions. [2021-06-05 05:43:38,743 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 940 transitions. Word has length 33 [2021-06-05 05:43:38,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:38,743 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 940 transitions. [2021-06-05 05:43:38,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:38,743 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 940 transitions. [2021-06-05 05:43:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:43:38,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:38,744 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:38,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 05:43:38,952 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:38,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:38,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1277289895, now seen corresponding path program 29 times [2021-06-05 05:43:38,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:38,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881973900] [2021-06-05 05:43:38,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:39,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:39,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881973900] [2021-06-05 05:43:39,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881973900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:39,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673480928] [2021-06-05 05:43:39,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:39,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:43:39,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:39,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:43:39,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:39,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:39,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:43:39,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:43:39,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:39,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:39,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:39,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-06-05 05:43:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:39,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673480928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:39,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:39,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 05:43:39,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355285523] [2021-06-05 05:43:39,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:43:39,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:39,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:43:39,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:43:39,633 INFO L87 Difference]: Start difference. First operand 459 states and 940 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:40,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:40,640 INFO L93 Difference]: Finished difference Result 618 states and 1220 transitions. [2021-06-05 05:43:40,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:43:40,641 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:43:40,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:40,642 INFO L225 Difference]: With dead ends: 618 [2021-06-05 05:43:40,642 INFO L226 Difference]: Without dead ends: 570 [2021-06-05 05:43:40,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 856.4ms TimeCoverageRelationStatistics Valid=214, Invalid=2138, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:43:40,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-05 05:43:40,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 460. [2021-06-05 05:43:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.052287581699346) internal successors, (942), 459 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 942 transitions. [2021-06-05 05:43:40,647 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 942 transitions. Word has length 33 [2021-06-05 05:43:40,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:40,647 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 942 transitions. [2021-06-05 05:43:40,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:40,647 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 942 transitions. [2021-06-05 05:43:40,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:43:40,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:40,648 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:40,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 05:43:40,853 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:40,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:40,853 INFO L82 PathProgramCache]: Analyzing trace with hash 108332695, now seen corresponding path program 30 times [2021-06-05 05:43:40,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:40,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508160453] [2021-06-05 05:43:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:41,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:41,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508160453] [2021-06-05 05:43:41,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508160453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:41,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660852728] [2021-06-05 05:43:41,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:41,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:43:41,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:41,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:43:41,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:41,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:41,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:43:41,360 INFO L388 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 27 treesize of output 13 [2021-06-05 05:43:41,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:41,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:41,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:41,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:43:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:41,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660852728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:41,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:41,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:43:41,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000680534] [2021-06-05 05:43:41,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:43:41,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:41,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:43:41,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:43:41,472 INFO L87 Difference]: Start difference. First operand 460 states and 942 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:42,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:42,470 INFO L93 Difference]: Finished difference Result 656 states and 1298 transitions. [2021-06-05 05:43:42,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:43:42,470 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:43:42,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:42,472 INFO L225 Difference]: With dead ends: 656 [2021-06-05 05:43:42,472 INFO L226 Difference]: Without dead ends: 608 [2021-06-05 05:43:42,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 883.5ms TimeCoverageRelationStatistics Valid=204, Invalid=2052, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:43:42,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-05 05:43:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 464. [2021-06-05 05:43:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.0518358531317493) internal successors, (950), 463 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:42,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 950 transitions. [2021-06-05 05:43:42,477 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 950 transitions. Word has length 33 [2021-06-05 05:43:42,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:42,477 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 950 transitions. [2021-06-05 05:43:42,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 950 transitions. [2021-06-05 05:43:42,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:43:42,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:42,478 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:42,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 05:43:42,694 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:42,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:42,694 INFO L82 PathProgramCache]: Analyzing trace with hash -532777895, now seen corresponding path program 31 times [2021-06-05 05:43:42,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:42,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269642951] [2021-06-05 05:43:42,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:42,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:42,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269642951] [2021-06-05 05:43:42,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269642951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:42,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776288838] [2021-06-05 05:43:42,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:42,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:43:42,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:43,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:43:43,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:43,138 INFO L388 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 27 treesize of output 13 [2021-06-05 05:43:43,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:43,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:43,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:43,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:43:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:43,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776288838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:43,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:43,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:43:43,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046737031] [2021-06-05 05:43:43,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:43:43,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:43,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:43:43,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:43:43,279 INFO L87 Difference]: Start difference. First operand 464 states and 950 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:44,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:44,448 INFO L93 Difference]: Finished difference Result 689 states and 1367 transitions. [2021-06-05 05:43:44,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:43:44,449 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:43:44,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:44,450 INFO L225 Difference]: With dead ends: 689 [2021-06-05 05:43:44,450 INFO L226 Difference]: Without dead ends: 657 [2021-06-05 05:43:44,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 946.0ms TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:43:44,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-06-05 05:43:44,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 465. [2021-06-05 05:43:44,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.0517241379310347) internal successors, (952), 464 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:44,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 952 transitions. [2021-06-05 05:43:44,456 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 952 transitions. Word has length 33 [2021-06-05 05:43:44,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:44,456 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 952 transitions. [2021-06-05 05:43:44,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:44,456 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 952 transitions. [2021-06-05 05:43:44,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:43:44,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:44,457 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:44,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:44,657 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:44,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:44,658 INFO L82 PathProgramCache]: Analyzing trace with hash 893464471, now seen corresponding path program 32 times [2021-06-05 05:43:44,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:44,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991908694] [2021-06-05 05:43:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:44,887 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:44,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:44,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991908694] [2021-06-05 05:43:44,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991908694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:44,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153951295] [2021-06-05 05:43:44,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:44,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:43:44,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:44,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:43:44,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:45,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:45,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:45,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:43:45,121 INFO L388 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 27 treesize of output 13 [2021-06-05 05:43:45,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:45,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:45,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:45,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:43:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:45,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153951295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:45,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:45,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:43:45,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958195904] [2021-06-05 05:43:45,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:43:45,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:45,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:43:45,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:43:45,263 INFO L87 Difference]: Start difference. First operand 465 states and 952 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:46,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:46,683 INFO L93 Difference]: Finished difference Result 757 states and 1498 transitions. [2021-06-05 05:43:46,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:43:46,683 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:43:46,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:46,685 INFO L225 Difference]: With dead ends: 757 [2021-06-05 05:43:46,685 INFO L226 Difference]: Without dead ends: 713 [2021-06-05 05:43:46,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1087.2ms TimeCoverageRelationStatistics Valid=294, Invalid=3012, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:43:46,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-06-05 05:43:46,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 461. [2021-06-05 05:43:46,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.0456521739130435) internal successors, (941), 460 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:46,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 941 transitions. [2021-06-05 05:43:46,691 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 941 transitions. Word has length 33 [2021-06-05 05:43:46,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:46,691 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 941 transitions. [2021-06-05 05:43:46,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:46,691 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 941 transitions. [2021-06-05 05:43:46,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:43:46,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:46,692 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:46,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 05:43:46,897 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:46,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:46,897 INFO L82 PathProgramCache]: Analyzing trace with hash 255748759, now seen corresponding path program 33 times [2021-06-05 05:43:46,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:46,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630929527] [2021-06-05 05:43:46,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:47,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:47,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630929527] [2021-06-05 05:43:47,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630929527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:47,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74077433] [2021-06-05 05:43:47,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:47,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:43:47,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:47,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:43:47,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:47,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:47,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:47,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:43:47,326 INFO L388 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 27 treesize of output 13 [2021-06-05 05:43:47,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:47,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:47,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:47,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-06-05 05:43:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:47,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74077433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:47,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:47,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:43:47,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083802306] [2021-06-05 05:43:47,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:43:47,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:47,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:43:47,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:43:47,483 INFO L87 Difference]: Start difference. First operand 461 states and 941 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:48,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:48,369 INFO L93 Difference]: Finished difference Result 579 states and 1168 transitions. [2021-06-05 05:43:48,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:43:48,369 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:43:48,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:48,371 INFO L225 Difference]: With dead ends: 579 [2021-06-05 05:43:48,371 INFO L226 Difference]: Without dead ends: 551 [2021-06-05 05:43:48,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 787.9ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:43:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-06-05 05:43:48,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 453. [2021-06-05 05:43:48,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 2.0464601769911503) internal successors, (925), 452 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:48,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 925 transitions. [2021-06-05 05:43:48,376 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 925 transitions. Word has length 33 [2021-06-05 05:43:48,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:48,376 INFO L482 AbstractCegarLoop]: Abstraction has 453 states and 925 transitions. [2021-06-05 05:43:48,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:48,376 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 925 transitions. [2021-06-05 05:43:48,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:43:48,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:48,377 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:48,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 05:43:48,581 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:48,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:48,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1562594731, now seen corresponding path program 34 times [2021-06-05 05:43:48,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:48,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316228900] [2021-06-05 05:43:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:48,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:48,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316228900] [2021-06-05 05:43:48,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316228900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:48,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790959351] [2021-06-05 05:43:48,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:48,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:43:48,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:48,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:43:48,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:49,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:49,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:49,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:43:49,086 INFO L388 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 27 treesize of output 13 [2021-06-05 05:43:49,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:49,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:49,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:49,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:43:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:49,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790959351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:49,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:49,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:43:49,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302918667] [2021-06-05 05:43:49,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:43:49,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:49,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:43:49,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:43:49,185 INFO L87 Difference]: Start difference. First operand 453 states and 925 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:49,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:49,934 INFO L93 Difference]: Finished difference Result 557 states and 1118 transitions. [2021-06-05 05:43:49,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:43:49,934 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:43:49,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:49,936 INFO L225 Difference]: With dead ends: 557 [2021-06-05 05:43:49,936 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 05:43:49,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 782.2ms TimeCoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:43:49,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 05:43:49,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 456. [2021-06-05 05:43:49,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 2.046153846153846) internal successors, (931), 455 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:49,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 931 transitions. [2021-06-05 05:43:49,940 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 931 transitions. Word has length 33 [2021-06-05 05:43:49,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:49,940 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 931 transitions. [2021-06-05 05:43:49,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:49,940 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 931 transitions. [2021-06-05 05:43:49,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:43:49,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:49,941 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:50,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:50,157 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:50,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:50,157 INFO L82 PathProgramCache]: Analyzing trace with hash -176972141, now seen corresponding path program 35 times [2021-06-05 05:43:50,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:50,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79195916] [2021-06-05 05:43:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:50,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:50,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79195916] [2021-06-05 05:43:50,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79195916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:50,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744064173] [2021-06-05 05:43:50,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:50,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:43:50,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:50,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:43:50,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:50,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:50,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:43:50,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:43:50,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:50,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:50,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:50,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-06-05 05:43:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:50,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744064173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:50,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:50,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:43:50,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587198073] [2021-06-05 05:43:50,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:43:50,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:50,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:43:50,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:43:50,753 INFO L87 Difference]: Start difference. First operand 456 states and 931 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:51,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:51,653 INFO L93 Difference]: Finished difference Result 562 states and 1131 transitions. [2021-06-05 05:43:51,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:43:51,653 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:43:51,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:51,654 INFO L225 Difference]: With dead ends: 562 [2021-06-05 05:43:51,654 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 05:43:51,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 822.7ms TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:43:51,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 05:43:51,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 462. [2021-06-05 05:43:51,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0455531453362257) internal successors, (943), 461 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:51,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 943 transitions. [2021-06-05 05:43:51,659 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 943 transitions. Word has length 33 [2021-06-05 05:43:51,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:51,659 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 943 transitions. [2021-06-05 05:43:51,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:51,659 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 943 transitions. [2021-06-05 05:43:51,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:43:51,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:51,660 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:51,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 05:43:51,869 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:51,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:51,869 INFO L82 PathProgramCache]: Analyzing trace with hash -818082731, now seen corresponding path program 36 times [2021-06-05 05:43:51,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:51,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304785509] [2021-06-05 05:43:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:52,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:52,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304785509] [2021-06-05 05:43:52,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304785509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:52,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864541722] [2021-06-05 05:43:52,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:52,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:43:52,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:52,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:43:52,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:52,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:43:52,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:52,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:43:52,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:52,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:52,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:52,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-06-05 05:43:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:52,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864541722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:52,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:52,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:43:52,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118430138] [2021-06-05 05:43:52,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:43:52,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:52,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:43:52,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:43:52,450 INFO L87 Difference]: Start difference. First operand 462 states and 943 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:53,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:53,407 INFO L93 Difference]: Finished difference Result 596 states and 1202 transitions. [2021-06-05 05:43:53,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:43:53,407 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:43:53,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:53,408 INFO L225 Difference]: With dead ends: 596 [2021-06-05 05:43:53,408 INFO L226 Difference]: Without dead ends: 564 [2021-06-05 05:43:53,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 873.1ms TimeCoverageRelationStatistics Valid=264, Invalid=2186, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:43:53,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-06-05 05:43:53,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 463. [2021-06-05 05:43:53,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.0454545454545454) internal successors, (945), 462 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:53,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 945 transitions. [2021-06-05 05:43:53,413 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 945 transitions. Word has length 33 [2021-06-05 05:43:53,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:53,414 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 945 transitions. [2021-06-05 05:43:53,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:53,414 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 945 transitions. [2021-06-05 05:43:53,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:43:53,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:53,414 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:53,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:53,630 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:53,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:53,631 INFO L82 PathProgramCache]: Analyzing trace with hash 608159635, now seen corresponding path program 37 times [2021-06-05 05:43:53,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:53,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002876571] [2021-06-05 05:43:53,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:53,864 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:53,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:53,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002876571] [2021-06-05 05:43:53,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002876571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:53,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244865989] [2021-06-05 05:43:53,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:53,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:43:53,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:54,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:54,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:54,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:43:54,100 INFO L388 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 27 treesize of output 13 [2021-06-05 05:43:54,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:54,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:54,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:54,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:43:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:54,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244865989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:54,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:54,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:43:54,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971321642] [2021-06-05 05:43:54,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:43:54,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:54,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:43:54,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:43:54,217 INFO L87 Difference]: Start difference. First operand 463 states and 945 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:55,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:55,670 INFO L93 Difference]: Finished difference Result 658 states and 1327 transitions. [2021-06-05 05:43:55,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:43:55,670 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:43:55,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:55,672 INFO L225 Difference]: With dead ends: 658 [2021-06-05 05:43:55,672 INFO L226 Difference]: Without dead ends: 610 [2021-06-05 05:43:55,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1160.9ms TimeCoverageRelationStatistics Valid=371, Invalid=3169, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:43:55,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-05 05:43:55,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 464. [2021-06-05 05:43:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.0431965442764577) internal successors, (946), 463 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:55,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 946 transitions. [2021-06-05 05:43:55,677 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 946 transitions. Word has length 33 [2021-06-05 05:43:55,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:55,677 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 946 transitions. [2021-06-05 05:43:55,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:55,677 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 946 transitions. [2021-06-05 05:43:55,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:43:55,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:55,678 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:55,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 05:43:55,893 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:55,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:55,893 INFO L82 PathProgramCache]: Analyzing trace with hash -306473111, now seen corresponding path program 38 times [2021-06-05 05:43:55,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:55,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921075658] [2021-06-05 05:43:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:56,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:56,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921075658] [2021-06-05 05:43:56,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921075658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:56,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365430701] [2021-06-05 05:43:56,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:56,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:43:56,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:56,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:43:56,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:56,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:56,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:43:56,316 INFO L388 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 27 treesize of output 13 [2021-06-05 05:43:56,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:56,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:56,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:56,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-06-05 05:43:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:56,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365430701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:56,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:56,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:43:56,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187199134] [2021-06-05 05:43:56,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:43:56,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:56,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:43:56,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:43:56,492 INFO L87 Difference]: Start difference. First operand 464 states and 946 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:57,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:57,430 INFO L93 Difference]: Finished difference Result 556 states and 1117 transitions. [2021-06-05 05:43:57,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:43:57,430 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:43:57,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:57,431 INFO L225 Difference]: With dead ends: 556 [2021-06-05 05:43:57,431 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 05:43:57,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 904.3ms TimeCoverageRelationStatistics Valid=260, Invalid=2190, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:43:57,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 05:43:57,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 459. [2021-06-05 05:43:57,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.0458515283842793) internal successors, (937), 458 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:57,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 937 transitions. [2021-06-05 05:43:57,436 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 937 transitions. Word has length 33 [2021-06-05 05:43:57,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:57,436 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 937 transitions. [2021-06-05 05:43:57,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:57,436 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 937 transitions. [2021-06-05 05:43:57,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:43:57,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:57,437 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:57,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:57,638 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:57,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:57,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1502778699, now seen corresponding path program 39 times [2021-06-05 05:43:57,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:57,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658486763] [2021-06-05 05:43:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:57,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:57,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658486763] [2021-06-05 05:43:57,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658486763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:57,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740816563] [2021-06-05 05:43:57,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:57,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:43:57,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:57,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:43:57,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:58,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:58,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:43:58,186 INFO L388 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 27 treesize of output 13 [2021-06-05 05:43:58,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:58,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:58,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:58,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:43:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:58,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740816563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:58,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:58,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:43:58,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851486857] [2021-06-05 05:43:58,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:43:58,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:58,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:43:58,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:43:58,287 INFO L87 Difference]: Start difference. First operand 459 states and 937 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:59,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:59,161 INFO L93 Difference]: Finished difference Result 607 states and 1202 transitions. [2021-06-05 05:43:59,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:43:59,161 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:43:59,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:59,162 INFO L225 Difference]: With dead ends: 607 [2021-06-05 05:43:59,162 INFO L226 Difference]: Without dead ends: 559 [2021-06-05 05:43:59,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 801.9ms TimeCoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:43:59,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-05 05:43:59,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 471. [2021-06-05 05:43:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.051063829787234) internal successors, (964), 470 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 964 transitions. [2021-06-05 05:43:59,167 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 964 transitions. Word has length 33 [2021-06-05 05:43:59,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:59,168 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 964 transitions. [2021-06-05 05:43:59,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:59,168 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 964 transitions. [2021-06-05 05:43:59,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:43:59,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:59,168 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:59,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 05:43:59,378 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:59,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:59,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1512816883, now seen corresponding path program 40 times [2021-06-05 05:43:59,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:59,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674020166] [2021-06-05 05:43:59,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:59,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:59,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674020166] [2021-06-05 05:43:59,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674020166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:59,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441250401] [2021-06-05 05:43:59,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:59,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:43:59,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:59,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:43:59,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:59,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:59,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:43:59,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:43:59,874 INFO L388 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 27 treesize of output 13 [2021-06-05 05:43:59,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:43:59,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:43:59,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:43:59,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:43:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:59,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441250401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:59,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:59,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:43:59,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399370694] [2021-06-05 05:43:59,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:43:59,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:59,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:43:59,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:43:59,982 INFO L87 Difference]: Start difference. First operand 471 states and 964 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:00,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:00,936 INFO L93 Difference]: Finished difference Result 644 states and 1269 transitions. [2021-06-05 05:44:00,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:44:00,936 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:00,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:00,938 INFO L225 Difference]: With dead ends: 644 [2021-06-05 05:44:00,938 INFO L226 Difference]: Without dead ends: 596 [2021-06-05 05:44:00,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 793.8ms TimeCoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:44:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-06-05 05:44:00,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 472. [2021-06-05 05:44:00,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.050955414012739) internal successors, (966), 471 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:00,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 966 transitions. [2021-06-05 05:44:00,943 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 966 transitions. Word has length 33 [2021-06-05 05:44:00,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:00,943 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 966 transitions. [2021-06-05 05:44:00,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:00,943 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 966 transitions. [2021-06-05 05:44:00,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:00,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:00,943 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:01,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 05:44:01,144 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:01,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:01,144 INFO L82 PathProgramCache]: Analyzing trace with hash -127194293, now seen corresponding path program 41 times [2021-06-05 05:44:01,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:01,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098616056] [2021-06-05 05:44:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:01,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:01,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098616056] [2021-06-05 05:44:01,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098616056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:01,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231634986] [2021-06-05 05:44:01,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:01,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:44:01,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:01,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:44:01,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:01,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:01,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:01,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:01,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:44:01,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:01,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:01,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:01,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-06-05 05:44:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:01,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231634986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:01,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:01,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:44:01,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409596814] [2021-06-05 05:44:01,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:44:01,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:01,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:44:01,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:44:01,769 INFO L87 Difference]: Start difference. First operand 472 states and 966 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:02,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:02,885 INFO L93 Difference]: Finished difference Result 682 states and 1347 transitions. [2021-06-05 05:44:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:44:02,886 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:02,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:02,887 INFO L225 Difference]: With dead ends: 682 [2021-06-05 05:44:02,887 INFO L226 Difference]: Without dead ends: 634 [2021-06-05 05:44:02,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 863.4ms TimeCoverageRelationStatistics Valid=204, Invalid=2052, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:44:02,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-06-05 05:44:02,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 476. [2021-06-05 05:44:02,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.0505263157894738) internal successors, (974), 475 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:02,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 974 transitions. [2021-06-05 05:44:02,893 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 974 transitions. Word has length 33 [2021-06-05 05:44:02,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:02,893 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 974 transitions. [2021-06-05 05:44:02,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:02,893 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 974 transitions. [2021-06-05 05:44:02,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:02,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:02,893 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:03,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:03,094 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:03,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:03,094 INFO L82 PathProgramCache]: Analyzing trace with hash -768304883, now seen corresponding path program 42 times [2021-06-05 05:44:03,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:03,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147713534] [2021-06-05 05:44:03,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:03,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:03,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147713534] [2021-06-05 05:44:03,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147713534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:03,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824165148] [2021-06-05 05:44:03,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:03,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:44:03,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:03,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:44:03,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:03,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:03,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:03,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:44:03,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:03,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:03,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:03,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-06-05 05:44:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:03,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824165148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:03,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:03,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:44:03,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435076537] [2021-06-05 05:44:03,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:44:03,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:03,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:44:03,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:44:03,742 INFO L87 Difference]: Start difference. First operand 476 states and 974 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:04,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:04,761 INFO L93 Difference]: Finished difference Result 715 states and 1416 transitions. [2021-06-05 05:44:04,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:44:04,761 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:04,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:04,763 INFO L225 Difference]: With dead ends: 715 [2021-06-05 05:44:04,763 INFO L226 Difference]: Without dead ends: 683 [2021-06-05 05:44:04,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 921.2ms TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:44:04,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-06-05 05:44:04,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 477. [2021-06-05 05:44:04,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.0504201680672267) internal successors, (976), 476 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:04,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 976 transitions. [2021-06-05 05:44:04,768 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 976 transitions. Word has length 33 [2021-06-05 05:44:04,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:04,768 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 976 transitions. [2021-06-05 05:44:04,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:04,769 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 976 transitions. [2021-06-05 05:44:04,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:04,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:04,769 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:04,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 05:44:04,985 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:04,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:04,985 INFO L82 PathProgramCache]: Analyzing trace with hash 657937483, now seen corresponding path program 43 times [2021-06-05 05:44:04,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:04,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126407731] [2021-06-05 05:44:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:05,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:05,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126407731] [2021-06-05 05:44:05,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126407731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:05,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44631862] [2021-06-05 05:44:05,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:05,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:44:05,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:05,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:05,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:05,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:05,468 INFO L388 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 27 treesize of output 13 [2021-06-05 05:44:05,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:05,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:05,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:05,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:44:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:05,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44631862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:05,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:05,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:44:05,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453279473] [2021-06-05 05:44:05,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:44:05,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:05,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:44:05,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:44:05,595 INFO L87 Difference]: Start difference. First operand 477 states and 976 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:07,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:07,070 INFO L93 Difference]: Finished difference Result 783 states and 1547 transitions. [2021-06-05 05:44:07,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:44:07,070 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:07,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:07,072 INFO L225 Difference]: With dead ends: 783 [2021-06-05 05:44:07,072 INFO L226 Difference]: Without dead ends: 739 [2021-06-05 05:44:07,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1096.3ms TimeCoverageRelationStatistics Valid=294, Invalid=3012, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:44:07,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-06-05 05:44:07,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 473. [2021-06-05 05:44:07,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.044491525423729) internal successors, (965), 472 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 965 transitions. [2021-06-05 05:44:07,084 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 965 transitions. Word has length 33 [2021-06-05 05:44:07,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:07,084 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 965 transitions. [2021-06-05 05:44:07,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:07,084 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 965 transitions. [2021-06-05 05:44:07,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:07,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:07,085 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:07,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:07,286 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:07,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:07,288 INFO L82 PathProgramCache]: Analyzing trace with hash 20221771, now seen corresponding path program 44 times [2021-06-05 05:44:07,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:07,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607207973] [2021-06-05 05:44:07,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:07,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:07,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607207973] [2021-06-05 05:44:07,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607207973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:07,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792223575] [2021-06-05 05:44:07,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:44:07,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:44:07,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:07,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:44:07,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:07,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:07,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:07,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:07,701 INFO L388 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 27 treesize of output 13 [2021-06-05 05:44:07,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:07,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:07,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:07,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-06-05 05:44:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:07,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792223575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:07,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:07,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:44:07,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253227679] [2021-06-05 05:44:07,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:44:07,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:07,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:44:07,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:44:07,852 INFO L87 Difference]: Start difference. First operand 473 states and 965 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:08,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:08,758 INFO L93 Difference]: Finished difference Result 605 states and 1217 transitions. [2021-06-05 05:44:08,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:44:08,758 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:08,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:08,759 INFO L225 Difference]: With dead ends: 605 [2021-06-05 05:44:08,759 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 05:44:08,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 788.9ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:44:08,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 05:44:08,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 465. [2021-06-05 05:44:08,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.0452586206896552) internal successors, (949), 464 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:08,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 949 transitions. [2021-06-05 05:44:08,764 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 949 transitions. Word has length 33 [2021-06-05 05:44:08,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:08,764 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 949 transitions. [2021-06-05 05:44:08,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:08,764 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 949 transitions. [2021-06-05 05:44:08,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:08,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:08,765 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:08,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:08,965 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:08,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:08,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1798121719, now seen corresponding path program 45 times [2021-06-05 05:44:08,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:08,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158544447] [2021-06-05 05:44:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:09,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:09,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158544447] [2021-06-05 05:44:09,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158544447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:09,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072318755] [2021-06-05 05:44:09,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:09,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:44:09,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:09,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:44:09,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:09,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:09,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:09,481 INFO L388 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 27 treesize of output 13 [2021-06-05 05:44:09,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:09,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:09,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:09,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:44:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:09,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072318755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:09,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:09,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:44:09,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223719775] [2021-06-05 05:44:09,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:44:09,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:09,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:44:09,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:44:09,589 INFO L87 Difference]: Start difference. First operand 465 states and 949 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:10,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:10,312 INFO L93 Difference]: Finished difference Result 583 states and 1167 transitions. [2021-06-05 05:44:10,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:44:10,312 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:10,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:10,313 INFO L225 Difference]: With dead ends: 583 [2021-06-05 05:44:10,313 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 05:44:10,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 833.6ms TimeCoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:44:10,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 05:44:10,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 468. [2021-06-05 05:44:10,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.044967880085653) internal successors, (955), 467 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 955 transitions. [2021-06-05 05:44:10,318 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 955 transitions. Word has length 33 [2021-06-05 05:44:10,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:10,318 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 955 transitions. [2021-06-05 05:44:10,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:10,318 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 955 transitions. [2021-06-05 05:44:10,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:10,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:10,319 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:10,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 05:44:10,519 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:10,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:10,519 INFO L82 PathProgramCache]: Analyzing trace with hash -412499129, now seen corresponding path program 46 times [2021-06-05 05:44:10,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:10,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316282974] [2021-06-05 05:44:10,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:10,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:10,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316282974] [2021-06-05 05:44:10,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316282974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:10,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073545383] [2021-06-05 05:44:10,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:10,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:44:10,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:10,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:44:10,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:11,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:11,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:11,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:11,008 INFO L388 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 27 treesize of output 13 [2021-06-05 05:44:11,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:11,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:11,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:11,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:44:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:11,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073545383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:11,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:11,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:44:11,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674346318] [2021-06-05 05:44:11,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:44:11,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:11,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:44:11,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:44:11,105 INFO L87 Difference]: Start difference. First operand 468 states and 955 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:12,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:12,454 INFO L93 Difference]: Finished difference Result 708 states and 1405 transitions. [2021-06-05 05:44:12,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:44:12,454 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:12,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:12,455 INFO L225 Difference]: With dead ends: 708 [2021-06-05 05:44:12,455 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 05:44:12,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1183.9ms TimeCoverageRelationStatistics Valid=336, Invalid=3086, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:44:12,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 05:44:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 483. [2021-06-05 05:44:12,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.045643153526971) internal successors, (986), 482 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 986 transitions. [2021-06-05 05:44:12,460 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 986 transitions. Word has length 33 [2021-06-05 05:44:12,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:12,460 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 986 transitions. [2021-06-05 05:44:12,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 986 transitions. [2021-06-05 05:44:12,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:12,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:12,461 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:12,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:12,677 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:12,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:12,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1053609719, now seen corresponding path program 47 times [2021-06-05 05:44:12,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:12,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832801336] [2021-06-05 05:44:12,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:12,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:12,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832801336] [2021-06-05 05:44:12,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832801336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:12,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921290397] [2021-06-05 05:44:12,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:12,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:44:12,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:12,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:44:12,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:13,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:13,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:13,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:13,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:44:13,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:13,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:13,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:13,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-06-05 05:44:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:13,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921290397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:13,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:13,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-05 05:44:13,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717100786] [2021-06-05 05:44:13,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:44:13,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:13,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:44:13,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:44:13,330 INFO L87 Difference]: Start difference. First operand 483 states and 986 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:14,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:14,731 INFO L93 Difference]: Finished difference Result 736 states and 1461 transitions. [2021-06-05 05:44:14,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:44:14,731 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:14,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:14,732 INFO L225 Difference]: With dead ends: 736 [2021-06-05 05:44:14,732 INFO L226 Difference]: Without dead ends: 668 [2021-06-05 05:44:14,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 1255.8ms TimeCoverageRelationStatistics Valid=441, Invalid=3719, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:44:14,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-06-05 05:44:14,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 484. [2021-06-05 05:44:14,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.0455486542443064) internal successors, (988), 483 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:14,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 988 transitions. [2021-06-05 05:44:14,737 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 988 transitions. Word has length 33 [2021-06-05 05:44:14,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:14,737 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 988 transitions. [2021-06-05 05:44:14,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:14,738 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 988 transitions. [2021-06-05 05:44:14,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:14,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:14,738 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:14,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 05:44:14,939 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:14,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:14,939 INFO L82 PathProgramCache]: Analyzing trace with hash 372632647, now seen corresponding path program 48 times [2021-06-05 05:44:14,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:14,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104754782] [2021-06-05 05:44:14,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:15,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:15,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104754782] [2021-06-05 05:44:15,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104754782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:15,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873613831] [2021-06-05 05:44:15,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:15,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:44:15,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:15,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:44:15,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:15,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:15,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:15,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:44:15,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:15,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:15,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:15,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-06-05 05:44:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:15,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873613831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:15,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:15,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:44:15,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071796826] [2021-06-05 05:44:15,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:44:15,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:15,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:44:15,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:44:15,542 INFO L87 Difference]: Start difference. First operand 484 states and 988 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:17,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:17,368 INFO L93 Difference]: Finished difference Result 829 states and 1649 transitions. [2021-06-05 05:44:17,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:44:17,368 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:17,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:17,369 INFO L225 Difference]: With dead ends: 829 [2021-06-05 05:44:17,369 INFO L226 Difference]: Without dead ends: 753 [2021-06-05 05:44:17,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 1499.3ms TimeCoverageRelationStatistics Valid=542, Invalid=4714, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:44:17,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-06-05 05:44:17,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 497. [2021-06-05 05:44:17,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.0483870967741935) internal successors, (1016), 496 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:17,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1016 transitions. [2021-06-05 05:44:17,375 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1016 transitions. Word has length 33 [2021-06-05 05:44:17,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:17,375 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1016 transitions. [2021-06-05 05:44:17,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:17,375 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1016 transitions. [2021-06-05 05:44:17,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:17,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:17,376 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:17,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 05:44:17,576 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:17,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:17,576 INFO L82 PathProgramCache]: Analyzing trace with hash -542000099, now seen corresponding path program 49 times [2021-06-05 05:44:17,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:17,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038465247] [2021-06-05 05:44:17,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:17,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:17,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038465247] [2021-06-05 05:44:17,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038465247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:17,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043610742] [2021-06-05 05:44:17,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:17,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:44:17,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:18,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:18,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:18,008 INFO L388 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 27 treesize of output 13 [2021-06-05 05:44:18,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:18,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:18,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:18,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-06-05 05:44:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:18,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043610742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:18,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:18,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:44:18,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948686677] [2021-06-05 05:44:18,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:44:18,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:18,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:44:18,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:44:18,160 INFO L87 Difference]: Start difference. First operand 497 states and 1016 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:19,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:19,454 INFO L93 Difference]: Finished difference Result 652 states and 1298 transitions. [2021-06-05 05:44:19,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:44:19,454 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:19,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:19,455 INFO L225 Difference]: With dead ends: 652 [2021-06-05 05:44:19,455 INFO L226 Difference]: Without dead ends: 596 [2021-06-05 05:44:19,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1190.9ms TimeCoverageRelationStatistics Valid=362, Invalid=3420, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:44:19,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-06-05 05:44:19,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 511. [2021-06-05 05:44:19,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.045098039215686) internal successors, (1043), 510 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1043 transitions. [2021-06-05 05:44:19,460 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1043 transitions. Word has length 33 [2021-06-05 05:44:19,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:19,460 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1043 transitions. [2021-06-05 05:44:19,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:19,460 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1043 transitions. [2021-06-05 05:44:19,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:19,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:19,461 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:19,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 05:44:19,662 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:19,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:19,662 INFO L82 PathProgramCache]: Analyzing trace with hash -2125436613, now seen corresponding path program 50 times [2021-06-05 05:44:19,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:19,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387557653] [2021-06-05 05:44:19,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:19,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:19,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387557653] [2021-06-05 05:44:19,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387557653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:19,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897653468] [2021-06-05 05:44:19,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:44:19,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:44:19,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:19,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:44:19,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:20,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:20,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:20,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:20,186 INFO L388 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 27 treesize of output 13 [2021-06-05 05:44:20,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:20,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:20,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:20,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:44:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:20,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897653468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:20,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:20,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:44:20,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980080798] [2021-06-05 05:44:20,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:44:20,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:20,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:44:20,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:44:20,284 INFO L87 Difference]: Start difference. First operand 511 states and 1043 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:21,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:21,097 INFO L93 Difference]: Finished difference Result 637 states and 1276 transitions. [2021-06-05 05:44:21,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:44:21,098 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:21,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:21,098 INFO L225 Difference]: With dead ends: 637 [2021-06-05 05:44:21,098 INFO L226 Difference]: Without dead ends: 589 [2021-06-05 05:44:21,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 775.8ms TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:44:21,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-05 05:44:21,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 515. [2021-06-05 05:44:21,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.044747081712062) internal successors, (1051), 514 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:21,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1051 transitions. [2021-06-05 05:44:21,104 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1051 transitions. Word has length 33 [2021-06-05 05:44:21,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:21,104 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1051 transitions. [2021-06-05 05:44:21,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:21,104 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1051 transitions. [2021-06-05 05:44:21,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:21,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:21,104 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:21,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 05:44:21,305 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:21,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:21,305 INFO L82 PathProgramCache]: Analyzing trace with hash -739814023, now seen corresponding path program 51 times [2021-06-05 05:44:21,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:21,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094724161] [2021-06-05 05:44:21,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:21,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:21,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094724161] [2021-06-05 05:44:21,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094724161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:21,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545048752] [2021-06-05 05:44:21,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:21,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:44:21,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:21,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:44:21,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:21,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:21,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:21,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:21,804 INFO L388 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 27 treesize of output 13 [2021-06-05 05:44:21,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:21,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:21,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:21,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:44:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:21,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545048752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:21,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:21,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:44:21,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611355766] [2021-06-05 05:44:21,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:44:21,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:21,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:44:21,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:44:21,919 INFO L87 Difference]: Start difference. First operand 515 states and 1051 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:23,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:23,329 INFO L93 Difference]: Finished difference Result 764 states and 1519 transitions. [2021-06-05 05:44:23,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:44:23,329 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:23,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:23,330 INFO L225 Difference]: With dead ends: 764 [2021-06-05 05:44:23,330 INFO L226 Difference]: Without dead ends: 669 [2021-06-05 05:44:23,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1231.8ms TimeCoverageRelationStatistics Valid=345, Invalid=3195, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:44:23,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-06-05 05:44:23,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 531. [2021-06-05 05:44:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.047169811320755) internal successors, (1085), 530 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:23,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1085 transitions. [2021-06-05 05:44:23,335 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1085 transitions. Word has length 33 [2021-06-05 05:44:23,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:23,336 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1085 transitions. [2021-06-05 05:44:23,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:23,336 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1085 transitions. [2021-06-05 05:44:23,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:23,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:23,336 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:23,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:23,552 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:23,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:23,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1380924613, now seen corresponding path program 52 times [2021-06-05 05:44:23,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:23,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882304892] [2021-06-05 05:44:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:23,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:23,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882304892] [2021-06-05 05:44:23,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882304892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:23,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095106057] [2021-06-05 05:44:23,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:23,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:44:23,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:23,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:44:23,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:24,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:24,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:24,005 INFO L388 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 27 treesize of output 13 [2021-06-05 05:44:24,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:24,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:24,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:24,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:44:24,143 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:24,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095106057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:24,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:24,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:44:24,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466412664] [2021-06-05 05:44:24,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:44:24,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:24,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:44:24,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:44:24,145 INFO L87 Difference]: Start difference. First operand 531 states and 1085 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:25,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:25,788 INFO L93 Difference]: Finished difference Result 788 states and 1566 transitions. [2021-06-05 05:44:25,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:44:25,789 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:25,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:25,790 INFO L225 Difference]: With dead ends: 788 [2021-06-05 05:44:25,790 INFO L226 Difference]: Without dead ends: 720 [2021-06-05 05:44:25,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 1332.8ms TimeCoverageRelationStatistics Valid=471, Invalid=3951, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:44:25,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-06-05 05:44:25,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 532. [2021-06-05 05:44:25,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.0451977401129944) internal successors, (1086), 531 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:25,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1086 transitions. [2021-06-05 05:44:25,796 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1086 transitions. Word has length 33 [2021-06-05 05:44:25,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:25,796 INFO L482 AbstractCegarLoop]: Abstraction has 532 states and 1086 transitions. [2021-06-05 05:44:25,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:25,796 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1086 transitions. [2021-06-05 05:44:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:25,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:25,796 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:25,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:25,997 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:25,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:25,997 INFO L82 PathProgramCache]: Analyzing trace with hash 45317753, now seen corresponding path program 53 times [2021-06-05 05:44:25,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:25,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508327146] [2021-06-05 05:44:25,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:26,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:26,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:26,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508327146] [2021-06-05 05:44:26,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508327146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:26,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177629010] [2021-06-05 05:44:26,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:26,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:44:26,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:26,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:44:26,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:26,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:26,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:26,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:44:26,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:26,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:26,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:26,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-06-05 05:44:26,582 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:26,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177629010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:26,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:26,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:44:26,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529100000] [2021-06-05 05:44:26,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:44:26,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:26,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:44:26,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:44:26,583 INFO L87 Difference]: Start difference. First operand 532 states and 1086 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:28,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:28,812 INFO L93 Difference]: Finished difference Result 888 states and 1768 transitions. [2021-06-05 05:44:28,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:44:28,812 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:28,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:28,813 INFO L225 Difference]: With dead ends: 888 [2021-06-05 05:44:28,815 INFO L226 Difference]: Without dead ends: 812 [2021-06-05 05:44:28,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 1700.1ms TimeCoverageRelationStatistics Valid=616, Invalid=5704, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 05:44:28,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-05 05:44:28,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 540. [2021-06-05 05:44:28,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.038961038961039) internal successors, (1099), 539 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:28,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1099 transitions. [2021-06-05 05:44:28,821 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1099 transitions. Word has length 33 [2021-06-05 05:44:28,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:28,821 INFO L482 AbstractCegarLoop]: Abstraction has 540 states and 1099 transitions. [2021-06-05 05:44:28,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:28,821 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1099 transitions. [2021-06-05 05:44:28,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:28,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:28,821 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:29,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:29,022 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:29,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:29,022 INFO L82 PathProgramCache]: Analyzing trace with hash -869314993, now seen corresponding path program 54 times [2021-06-05 05:44:29,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:29,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266154881] [2021-06-05 05:44:29,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:29,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:29,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266154881] [2021-06-05 05:44:29,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266154881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:29,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663598952] [2021-06-05 05:44:29,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:29,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:44:29,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:29,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:44:29,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:29,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:29,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:29,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:29,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:44:29,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:29,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:29,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:29,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:16 [2021-06-05 05:44:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:29,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663598952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:29,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:29,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:44:29,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457153785] [2021-06-05 05:44:29,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:44:29,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:29,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:44:29,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:44:29,601 INFO L87 Difference]: Start difference. First operand 540 states and 1099 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:30,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:30,710 INFO L93 Difference]: Finished difference Result 715 states and 1420 transitions. [2021-06-05 05:44:30,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:44:30,710 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:30,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:30,711 INFO L225 Difference]: With dead ends: 715 [2021-06-05 05:44:30,711 INFO L226 Difference]: Without dead ends: 659 [2021-06-05 05:44:30,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1114.5ms TimeCoverageRelationStatistics Valid=354, Invalid=3306, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:44:30,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-06-05 05:44:30,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 544. [2021-06-05 05:44:30,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 2.0386740331491713) internal successors, (1107), 543 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:30,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1107 transitions. [2021-06-05 05:44:30,716 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1107 transitions. Word has length 33 [2021-06-05 05:44:30,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:30,716 INFO L482 AbstractCegarLoop]: Abstraction has 544 states and 1107 transitions. [2021-06-05 05:44:30,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:30,716 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1107 transitions. [2021-06-05 05:44:30,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:30,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:30,717 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:30,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 05:44:30,917 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:30,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:30,918 INFO L82 PathProgramCache]: Analyzing trace with hash -865898715, now seen corresponding path program 55 times [2021-06-05 05:44:30,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:30,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904358059] [2021-06-05 05:44:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:31,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:31,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904358059] [2021-06-05 05:44:31,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904358059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:31,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269606437] [2021-06-05 05:44:31,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:31,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:44:31,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:31,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:31,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:31,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:31,427 INFO L388 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 27 treesize of output 13 [2021-06-05 05:44:31,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:31,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:31,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:31,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:44:31,528 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:31,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269606437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:31,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:31,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:44:31,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989186987] [2021-06-05 05:44:31,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:44:31,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:31,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:44:31,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:44:31,529 INFO L87 Difference]: Start difference. First operand 544 states and 1107 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:33,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:33,040 INFO L93 Difference]: Finished difference Result 766 states and 1515 transitions. [2021-06-05 05:44:33,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:44:33,041 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:33,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:33,041 INFO L225 Difference]: With dead ends: 766 [2021-06-05 05:44:33,041 INFO L226 Difference]: Without dead ends: 678 [2021-06-05 05:44:33,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1416.5ms TimeCoverageRelationStatistics Valid=399, Invalid=4023, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:44:33,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-06-05 05:44:33,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 570. [2021-06-05 05:44:33,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 2.0369068541300526) internal successors, (1159), 569 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:33,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1159 transitions. [2021-06-05 05:44:33,047 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1159 transitions. Word has length 33 [2021-06-05 05:44:33,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:33,047 INFO L482 AbstractCegarLoop]: Abstraction has 570 states and 1159 transitions. [2021-06-05 05:44:33,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:33,047 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1159 transitions. [2021-06-05 05:44:33,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:33,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:33,048 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:33,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:33,248 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:33,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:33,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1507009305, now seen corresponding path program 56 times [2021-06-05 05:44:33,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:33,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057517286] [2021-06-05 05:44:33,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:33,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:33,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057517286] [2021-06-05 05:44:33,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057517286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:33,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482280026] [2021-06-05 05:44:33,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:33,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:44:33,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:33,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:44:33,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:33,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:33,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:33,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:33,726 INFO L388 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 27 treesize of output 13 [2021-06-05 05:44:33,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:33,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:33,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:33,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:44:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:33,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482280026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:33,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:33,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:44:33,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287010664] [2021-06-05 05:44:33,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:44:33,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:33,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:44:33,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:44:33,843 INFO L87 Difference]: Start difference. First operand 570 states and 1159 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:35,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:35,404 INFO L93 Difference]: Finished difference Result 771 states and 1529 transitions. [2021-06-05 05:44:35,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:44:35,404 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:35,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:35,405 INFO L225 Difference]: With dead ends: 771 [2021-06-05 05:44:35,405 INFO L226 Difference]: Without dead ends: 707 [2021-06-05 05:44:35,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 1373.6ms TimeCoverageRelationStatistics Valid=431, Invalid=3991, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:44:35,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-06-05 05:44:35,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 571. [2021-06-05 05:44:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.0350877192982457) internal successors, (1160), 570 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1160 transitions. [2021-06-05 05:44:35,411 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1160 transitions. Word has length 33 [2021-06-05 05:44:35,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:35,411 INFO L482 AbstractCegarLoop]: Abstraction has 571 states and 1160 transitions. [2021-06-05 05:44:35,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:35,411 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1160 transitions. [2021-06-05 05:44:35,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:35,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:35,411 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:35,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 05:44:35,625 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:35,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:35,625 INFO L82 PathProgramCache]: Analyzing trace with hash -80766939, now seen corresponding path program 57 times [2021-06-05 05:44:35,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:35,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565182664] [2021-06-05 05:44:35,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:35,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:35,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:35,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565182664] [2021-06-05 05:44:35,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565182664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:35,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360637971] [2021-06-05 05:44:35,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:35,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:44:35,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:35,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:44:35,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:36,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:36,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:36,063 INFO L388 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 27 treesize of output 13 [2021-06-05 05:44:36,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:36,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:36,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:36,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:44:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:36,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360637971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:36,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:36,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:44:36,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846964538] [2021-06-05 05:44:36,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:44:36,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:36,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:44:36,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:44:36,184 INFO L87 Difference]: Start difference. First operand 571 states and 1160 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:38,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:38,130 INFO L93 Difference]: Finished difference Result 823 states and 1634 transitions. [2021-06-05 05:44:38,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:44:38,130 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:38,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:38,131 INFO L225 Difference]: With dead ends: 823 [2021-06-05 05:44:38,131 INFO L226 Difference]: Without dead ends: 767 [2021-06-05 05:44:38,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1574.2ms TimeCoverageRelationStatistics Valid=521, Invalid=4881, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:44:38,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-06-05 05:44:38,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 567. [2021-06-05 05:44:38,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 2.030035335689046) internal successors, (1149), 566 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:38,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1149 transitions. [2021-06-05 05:44:38,137 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1149 transitions. Word has length 33 [2021-06-05 05:44:38,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:38,137 INFO L482 AbstractCegarLoop]: Abstraction has 567 states and 1149 transitions. [2021-06-05 05:44:38,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:38,137 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1149 transitions. [2021-06-05 05:44:38,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:38,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:38,138 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:38,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:38,345 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:38,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:38,345 INFO L82 PathProgramCache]: Analyzing trace with hash -185613557, now seen corresponding path program 58 times [2021-06-05 05:44:38,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:38,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401785424] [2021-06-05 05:44:38,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:38,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:38,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401785424] [2021-06-05 05:44:38,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401785424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:38,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960821884] [2021-06-05 05:44:38,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:38,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:44:38,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:38,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:44:38,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:38,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:38,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:38,752 INFO L388 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 27 treesize of output 13 [2021-06-05 05:44:38,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:38,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:38,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:38,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-06-05 05:44:38,895 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:38,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960821884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:38,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:38,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-06-05 05:44:38,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510621679] [2021-06-05 05:44:38,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:44:38,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:38,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:44:38,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:44:38,897 INFO L87 Difference]: Start difference. First operand 567 states and 1149 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:40,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:40,234 INFO L93 Difference]: Finished difference Result 729 states and 1442 transitions. [2021-06-05 05:44:40,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:44:40,234 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:40,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:40,235 INFO L225 Difference]: With dead ends: 729 [2021-06-05 05:44:40,235 INFO L226 Difference]: Without dead ends: 673 [2021-06-05 05:44:40,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1193.9ms TimeCoverageRelationStatistics Valid=385, Invalid=3521, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:44:40,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-06-05 05:44:40,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 573. [2021-06-05 05:44:40,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.0262237762237763) internal successors, (1159), 572 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:40,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1159 transitions. [2021-06-05 05:44:40,240 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1159 transitions. Word has length 33 [2021-06-05 05:44:40,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:40,240 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1159 transitions. [2021-06-05 05:44:40,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:40,240 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1159 transitions. [2021-06-05 05:44:40,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:40,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:40,241 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:40,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 05:44:40,442 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:40,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:40,442 INFO L82 PathProgramCache]: Analyzing trace with hash -931000177, now seen corresponding path program 59 times [2021-06-05 05:44:40,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:40,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951635364] [2021-06-05 05:44:40,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:40,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:40,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951635364] [2021-06-05 05:44:40,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951635364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:40,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966467736] [2021-06-05 05:44:40,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:40,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:44:40,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:40,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 05:44:40,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:41,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:41,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:41,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:41,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:44:41,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:41,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:41,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:41,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-06-05 05:44:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:41,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966467736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:41,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:41,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 34 [2021-06-05 05:44:41,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334403907] [2021-06-05 05:44:41,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:44:41,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:41,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:44:41,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:44:41,195 INFO L87 Difference]: Start difference. First operand 573 states and 1159 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:41,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:41,953 INFO L93 Difference]: Finished difference Result 722 states and 1426 transitions. [2021-06-05 05:44:41,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:44:41,953 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:41,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:41,954 INFO L225 Difference]: With dead ends: 722 [2021-06-05 05:44:41,954 INFO L226 Difference]: Without dead ends: 674 [2021-06-05 05:44:41,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 939.3ms TimeCoverageRelationStatistics Valid=231, Invalid=2421, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:44:41,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-06-05 05:44:41,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 588. [2021-06-05 05:44:41,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.0306643952299828) internal successors, (1192), 587 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:41,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1192 transitions. [2021-06-05 05:44:41,960 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1192 transitions. Word has length 33 [2021-06-05 05:44:41,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:41,960 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1192 transitions. [2021-06-05 05:44:41,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:41,960 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1192 transitions. [2021-06-05 05:44:41,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:41,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:41,961 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:42,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:42,161 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:42,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:42,161 INFO L82 PathProgramCache]: Analyzing trace with hash 348371537, now seen corresponding path program 60 times [2021-06-05 05:44:42,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:42,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059869759] [2021-06-05 05:44:42,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:42,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:42,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059869759] [2021-06-05 05:44:42,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059869759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:42,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882159045] [2021-06-05 05:44:42,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:42,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:44:42,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:42,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:44:42,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:42,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:42,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:42,678 INFO L388 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 27 treesize of output 13 [2021-06-05 05:44:42,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:42,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:42,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:42,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:44:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:42,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882159045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:42,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:42,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:44:42,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946944861] [2021-06-05 05:44:42,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:44:42,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:42,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:44:42,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:44:42,788 INFO L87 Difference]: Start difference. First operand 588 states and 1192 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:43,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:43,715 INFO L93 Difference]: Finished difference Result 759 states and 1493 transitions. [2021-06-05 05:44:43,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:44:43,716 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:43,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:43,717 INFO L225 Difference]: With dead ends: 759 [2021-06-05 05:44:43,717 INFO L226 Difference]: Without dead ends: 711 [2021-06-05 05:44:43,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 824.6ms TimeCoverageRelationStatistics Valid=193, Invalid=1969, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:44:43,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-06-05 05:44:43,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 589. [2021-06-05 05:44:43,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 2.0306122448979593) internal successors, (1194), 588 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:43,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1194 transitions. [2021-06-05 05:44:43,722 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1194 transitions. Word has length 33 [2021-06-05 05:44:43,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:43,722 INFO L482 AbstractCegarLoop]: Abstraction has 589 states and 1194 transitions. [2021-06-05 05:44:43,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:43,722 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1194 transitions. [2021-06-05 05:44:43,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:43,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:43,723 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:43,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 05:44:43,923 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:43,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:43,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1733994127, now seen corresponding path program 61 times [2021-06-05 05:44:43,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:43,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528140813] [2021-06-05 05:44:43,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:44,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:44,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528140813] [2021-06-05 05:44:44,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528140813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:44,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153780139] [2021-06-05 05:44:44,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:44,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:44:44,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:44,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:44,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:44,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:44,418 INFO L388 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 27 treesize of output 13 [2021-06-05 05:44:44,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:44,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:44,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:44,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:44:44,522 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:44,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153780139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:44,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:44,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:44:44,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235631860] [2021-06-05 05:44:44,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:44:44,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:44,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:44:44,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:44:44,523 INFO L87 Difference]: Start difference. First operand 589 states and 1194 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:45,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:45,486 INFO L93 Difference]: Finished difference Result 797 states and 1571 transitions. [2021-06-05 05:44:45,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:44:45,487 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:45,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:45,488 INFO L225 Difference]: With dead ends: 797 [2021-06-05 05:44:45,488 INFO L226 Difference]: Without dead ends: 749 [2021-06-05 05:44:45,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 889.8ms TimeCoverageRelationStatistics Valid=205, Invalid=2147, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:44:45,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-06-05 05:44:45,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 593. [2021-06-05 05:44:45,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 2.0304054054054053) internal successors, (1202), 592 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:45,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1202 transitions. [2021-06-05 05:44:45,493 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1202 transitions. Word has length 33 [2021-06-05 05:44:45,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:45,493 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1202 transitions. [2021-06-05 05:44:45,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:45,493 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1202 transitions. [2021-06-05 05:44:45,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:45,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:45,494 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:45,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-05 05:44:45,709 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:45,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:45,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1092883537, now seen corresponding path program 62 times [2021-06-05 05:44:45,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:45,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988352744] [2021-06-05 05:44:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:45,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:45,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988352744] [2021-06-05 05:44:45,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988352744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:45,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595506978] [2021-06-05 05:44:45,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:45,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:44:45,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:45,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:44:45,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:46,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:46,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:46,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:46,152 INFO L388 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 27 treesize of output 13 [2021-06-05 05:44:46,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:46,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:46,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:46,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:44:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:46,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595506978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:46,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:46,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:44:46,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224058753] [2021-06-05 05:44:46,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:44:46,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:46,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:44:46,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:44:46,274 INFO L87 Difference]: Start difference. First operand 593 states and 1202 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:47,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:47,433 INFO L93 Difference]: Finished difference Result 830 states and 1640 transitions. [2021-06-05 05:44:47,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:44:47,433 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:47,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:47,434 INFO L225 Difference]: With dead ends: 830 [2021-06-05 05:44:47,434 INFO L226 Difference]: Without dead ends: 798 [2021-06-05 05:44:47,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 908.6ms TimeCoverageRelationStatistics Valid=242, Invalid=2410, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:44:47,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-06-05 05:44:47,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 594. [2021-06-05 05:44:47,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 2.03035413153457) internal successors, (1204), 593 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:47,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1204 transitions. [2021-06-05 05:44:47,440 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1204 transitions. Word has length 33 [2021-06-05 05:44:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:47,440 INFO L482 AbstractCegarLoop]: Abstraction has 594 states and 1204 transitions. [2021-06-05 05:44:47,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1204 transitions. [2021-06-05 05:44:47,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:47,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:47,441 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:47,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:47,657 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:47,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:47,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1775841393, now seen corresponding path program 63 times [2021-06-05 05:44:47,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:47,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839296533] [2021-06-05 05:44:47,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:47,874 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:47,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:47,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839296533] [2021-06-05 05:44:47,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839296533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:47,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127764118] [2021-06-05 05:44:47,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:47,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:44:47,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:47,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:44:47,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:48,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:48,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:48,140 INFO L388 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 27 treesize of output 13 [2021-06-05 05:44:48,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:48,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:48,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:48,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:44:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:48,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127764118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:48,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:48,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:44:48,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919905154] [2021-06-05 05:44:48,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:44:48,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:48,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:44:48,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:44:48,264 INFO L87 Difference]: Start difference. First operand 594 states and 1204 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:49,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:49,439 INFO L93 Difference]: Finished difference Result 897 states and 1769 transitions. [2021-06-05 05:44:49,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:44:49,439 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:49,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:49,440 INFO L225 Difference]: With dead ends: 897 [2021-06-05 05:44:49,440 INFO L226 Difference]: Without dead ends: 853 [2021-06-05 05:44:49,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1128.3ms TimeCoverageRelationStatistics Valid=295, Invalid=3127, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:44:49,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-06-05 05:44:49,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 590. [2021-06-05 05:44:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 2.025466893039049) internal successors, (1193), 589 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:49,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1193 transitions. [2021-06-05 05:44:49,446 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1193 transitions. Word has length 33 [2021-06-05 05:44:49,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:49,446 INFO L482 AbstractCegarLoop]: Abstraction has 590 states and 1193 transitions. [2021-06-05 05:44:49,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:49,446 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1193 transitions. [2021-06-05 05:44:49,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:49,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:49,447 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:49,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:49,648 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:49,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:49,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1881410191, now seen corresponding path program 64 times [2021-06-05 05:44:49,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:49,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744981301] [2021-06-05 05:44:49,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:49,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:49,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744981301] [2021-06-05 05:44:49,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744981301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:49,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444659256] [2021-06-05 05:44:49,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:49,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:44:49,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:49,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:44:49,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:50,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:50,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:50,119 INFO L388 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 27 treesize of output 13 [2021-06-05 05:44:50,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:50,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:50,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:50,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-06-05 05:44:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:50,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444659256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:50,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:50,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:44:50,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710953157] [2021-06-05 05:44:50,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:44:50,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:50,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:44:50,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:44:50,273 INFO L87 Difference]: Start difference. First operand 590 states and 1193 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:51,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:51,037 INFO L93 Difference]: Finished difference Result 720 states and 1441 transitions. [2021-06-05 05:44:51,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:44:51,037 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:51,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:51,038 INFO L225 Difference]: With dead ends: 720 [2021-06-05 05:44:51,038 INFO L226 Difference]: Without dead ends: 692 [2021-06-05 05:44:51,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 851.0ms TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:44:51,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-06-05 05:44:51,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 582. [2021-06-05 05:44:51,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 2.025817555938038) internal successors, (1177), 581 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:51,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1177 transitions. [2021-06-05 05:44:51,043 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1177 transitions. Word has length 33 [2021-06-05 05:44:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:51,043 INFO L482 AbstractCegarLoop]: Abstraction has 582 states and 1177 transitions. [2021-06-05 05:44:51,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:51,043 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1177 transitions. [2021-06-05 05:44:51,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:51,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:51,044 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:51,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 05:44:51,244 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:51,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:51,245 INFO L82 PathProgramCache]: Analyzing trace with hash 63066701, now seen corresponding path program 65 times [2021-06-05 05:44:51,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:51,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178220491] [2021-06-05 05:44:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:51,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:51,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178220491] [2021-06-05 05:44:51,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178220491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:51,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193242147] [2021-06-05 05:44:51,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:51,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:44:51,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:51,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:44:51,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:51,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:51,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:51,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:44:51,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:51,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:51,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:51,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-06-05 05:44:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:51,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193242147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:51,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:51,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-06-05 05:44:51,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874992747] [2021-06-05 05:44:51,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:44:51,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:51,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:44:51,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:44:51,880 INFO L87 Difference]: Start difference. First operand 582 states and 1177 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:52,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:52,920 INFO L93 Difference]: Finished difference Result 760 states and 1501 transitions. [2021-06-05 05:44:52,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:44:52,920 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:52,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:52,921 INFO L225 Difference]: With dead ends: 760 [2021-06-05 05:44:52,921 INFO L226 Difference]: Without dead ends: 664 [2021-06-05 05:44:52,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1064.0ms TimeCoverageRelationStatistics Valid=302, Invalid=3238, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:44:52,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-06-05 05:44:52,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 596. [2021-06-05 05:44:52,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 2.030252100840336) internal successors, (1208), 595 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:52,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1208 transitions. [2021-06-05 05:44:52,926 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1208 transitions. Word has length 33 [2021-06-05 05:44:52,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:52,927 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 1208 transitions. [2021-06-05 05:44:52,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:52,927 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1208 transitions. [2021-06-05 05:44:52,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:52,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:52,927 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:53,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:53,143 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:53,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:53,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1448689291, now seen corresponding path program 66 times [2021-06-05 05:44:53,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:53,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152308364] [2021-06-05 05:44:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:53,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:53,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152308364] [2021-06-05 05:44:53,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152308364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:53,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314966071] [2021-06-05 05:44:53,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:44:53,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:44:53,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:53,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:44:53,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:53,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:53,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:53,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:53,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:44:53,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:53,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:53,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:53,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-06-05 05:44:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:53,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314966071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:53,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:53,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:44:53,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302241064] [2021-06-05 05:44:53,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:44:53,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:53,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:44:53,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:44:53,796 INFO L87 Difference]: Start difference. First operand 596 states and 1208 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:55,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:55,239 INFO L93 Difference]: Finished difference Result 806 states and 1598 transitions. [2021-06-05 05:44:55,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:44:55,239 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:55,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:55,240 INFO L225 Difference]: With dead ends: 806 [2021-06-05 05:44:55,240 INFO L226 Difference]: Without dead ends: 711 [2021-06-05 05:44:55,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 1238.7ms TimeCoverageRelationStatistics Valid=334, Invalid=3206, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:44:55,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-06-05 05:44:55,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 599. [2021-06-05 05:44:55,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.0250836120401337) internal successors, (1211), 598 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:55,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1211 transitions. [2021-06-05 05:44:55,246 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1211 transitions. Word has length 33 [2021-06-05 05:44:55,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:55,246 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1211 transitions. [2021-06-05 05:44:55,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:55,246 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1211 transitions. [2021-06-05 05:44:55,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:55,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:55,246 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:55,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 05:44:55,463 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:55,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:55,463 INFO L82 PathProgramCache]: Analyzing trace with hash 807578701, now seen corresponding path program 67 times [2021-06-05 05:44:55,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:55,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625047298] [2021-06-05 05:44:55,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:55,673 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:55,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:55,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625047298] [2021-06-05 05:44:55,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625047298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:55,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008318678] [2021-06-05 05:44:55,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:55,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:44:55,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:55,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:55,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:55,907 INFO L388 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 27 treesize of output 13 [2021-06-05 05:44:55,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:55,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:55,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:55,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:44:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:56,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008318678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:56,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:56,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:44:56,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658867465] [2021-06-05 05:44:56,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:44:56,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:56,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:44:56,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:44:56,035 INFO L87 Difference]: Start difference. First operand 599 states and 1211 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:57,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:57,571 INFO L93 Difference]: Finished difference Result 830 states and 1647 transitions. [2021-06-05 05:44:57,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:44:57,572 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:44:57,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:57,572 INFO L225 Difference]: With dead ends: 830 [2021-06-05 05:44:57,572 INFO L226 Difference]: Without dead ends: 762 [2021-06-05 05:44:57,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1210.4ms TimeCoverageRelationStatistics Valid=412, Invalid=3494, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:44:57,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-05 05:44:57,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 600. [2021-06-05 05:44:57,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 2.025041736227045) internal successors, (1213), 599 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:57,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1213 transitions. [2021-06-05 05:44:57,578 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1213 transitions. Word has length 33 [2021-06-05 05:44:57,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:57,578 INFO L482 AbstractCegarLoop]: Abstraction has 600 states and 1213 transitions. [2021-06-05 05:44:57,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:57,578 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1213 transitions. [2021-06-05 05:44:57,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:44:57,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:57,579 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:57,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:57,779 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:57,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:57,780 INFO L82 PathProgramCache]: Analyzing trace with hash -2061146229, now seen corresponding path program 68 times [2021-06-05 05:44:57,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:57,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433337133] [2021-06-05 05:44:57,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:57,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:57,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433337133] [2021-06-05 05:44:57,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433337133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:57,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174407200] [2021-06-05 05:44:57,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:58,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:44:58,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:58,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:44:58,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:58,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:58,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:44:58,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:44:58,229 INFO L388 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 27 treesize of output 13 [2021-06-05 05:44:58,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:44:58,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:44:58,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:44:58,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:44:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:58,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174407200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:58,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:58,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:44:58,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116796145] [2021-06-05 05:44:58,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:44:58,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:58,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:44:58,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:44:58,361 INFO L87 Difference]: Start difference. First operand 600 states and 1213 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:00,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:00,251 INFO L93 Difference]: Finished difference Result 939 states and 1863 transitions. [2021-06-05 05:45:00,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:45:00,251 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:00,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:00,252 INFO L225 Difference]: With dead ends: 939 [2021-06-05 05:45:00,252 INFO L226 Difference]: Without dead ends: 863 [2021-06-05 05:45:00,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1482.9ms TimeCoverageRelationStatistics Valid=540, Invalid=4862, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:45:00,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-06-05 05:45:00,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 602. [2021-06-05 05:45:00,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 2.0232945091514143) internal successors, (1216), 601 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:00,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1216 transitions. [2021-06-05 05:45:00,258 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1216 transitions. Word has length 33 [2021-06-05 05:45:00,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:00,258 INFO L482 AbstractCegarLoop]: Abstraction has 602 states and 1216 transitions. [2021-06-05 05:45:00,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:00,258 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1216 transitions. [2021-06-05 05:45:00,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:00,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:00,259 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:00,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 05:45:00,459 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:00,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:00,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1319188321, now seen corresponding path program 69 times [2021-06-05 05:45:00,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:00,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480997609] [2021-06-05 05:45:00,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:00,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:00,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480997609] [2021-06-05 05:45:00,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480997609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:00,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662056800] [2021-06-05 05:45:00,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:00,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:45:00,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:00,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:00,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:00,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:45:00,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:00,902 INFO L388 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 27 treesize of output 13 [2021-06-05 05:45:00,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:00,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:00,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:00,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-06-05 05:45:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:01,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662056800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:01,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:01,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:45:01,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359837066] [2021-06-05 05:45:01,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:45:01,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:01,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:45:01,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:45:01,058 INFO L87 Difference]: Start difference. First operand 602 states and 1216 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:02,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:02,445 INFO L93 Difference]: Finished difference Result 762 states and 1508 transitions. [2021-06-05 05:45:02,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:45:02,446 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:02,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:02,447 INFO L225 Difference]: With dead ends: 762 [2021-06-05 05:45:02,447 INFO L226 Difference]: Without dead ends: 706 [2021-06-05 05:45:02,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1324.6ms TimeCoverageRelationStatistics Valid=359, Invalid=3547, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:45:02,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-06-05 05:45:02,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 595. [2021-06-05 05:45:02,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.025252525252525) internal successors, (1203), 594 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:02,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1203 transitions. [2021-06-05 05:45:02,452 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1203 transitions. Word has length 33 [2021-06-05 05:45:02,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:02,452 INFO L482 AbstractCegarLoop]: Abstraction has 595 states and 1203 transitions. [2021-06-05 05:45:02,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:02,452 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1203 transitions. [2021-06-05 05:45:02,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:02,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:02,453 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:02,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:02,673 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:02,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:02,673 INFO L82 PathProgramCache]: Analyzing trace with hash -264248193, now seen corresponding path program 70 times [2021-06-05 05:45:02,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:02,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703111302] [2021-06-05 05:45:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:02,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:02,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703111302] [2021-06-05 05:45:02,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703111302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:02,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821205073] [2021-06-05 05:45:02,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:02,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:45:02,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:02,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:02,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:03,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:03,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:03,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:45:03,220 INFO L388 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 27 treesize of output 13 [2021-06-05 05:45:03,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:03,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:03,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:03,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:45:03,337 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:03,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821205073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:03,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:03,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:45:03,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31502499] [2021-06-05 05:45:03,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:45:03,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:03,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:45:03,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:45:03,338 INFO L87 Difference]: Start difference. First operand 595 states and 1203 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:04,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:04,554 INFO L93 Difference]: Finished difference Result 781 states and 1543 transitions. [2021-06-05 05:45:04,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:45:04,554 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:04,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:04,555 INFO L225 Difference]: With dead ends: 781 [2021-06-05 05:45:04,555 INFO L226 Difference]: Without dead ends: 685 [2021-06-05 05:45:04,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1094.9ms TimeCoverageRelationStatistics Valid=272, Invalid=2808, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:45:04,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-05 05:45:04,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 606. [2021-06-05 05:45:04,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.031404958677686) internal successors, (1229), 605 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:04,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1229 transitions. [2021-06-05 05:45:04,561 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1229 transitions. Word has length 33 [2021-06-05 05:45:04,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:04,561 INFO L482 AbstractCegarLoop]: Abstraction has 606 states and 1229 transitions. [2021-06-05 05:45:04,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:04,561 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1229 transitions. [2021-06-05 05:45:04,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:04,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:04,562 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:04,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 05:45:04,770 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:04,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:04,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1121374397, now seen corresponding path program 71 times [2021-06-05 05:45:04,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:04,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88390592] [2021-06-05 05:45:04,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:05,056 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:05,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:05,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88390592] [2021-06-05 05:45:05,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88390592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:05,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978304712] [2021-06-05 05:45:05,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:05,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:45:05,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:05,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:45:05,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:05,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:05,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:45:05,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:45:05,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:05,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:05,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:05,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-06-05 05:45:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:05,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978304712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:05,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:05,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:45:05,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221378603] [2021-06-05 05:45:05,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:45:05,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:05,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:45:05,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:45:05,469 INFO L87 Difference]: Start difference. First operand 606 states and 1229 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:07,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:07,192 INFO L93 Difference]: Finished difference Result 862 states and 1713 transitions. [2021-06-05 05:45:07,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:45:07,192 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:07,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:07,192 INFO L225 Difference]: With dead ends: 862 [2021-06-05 05:45:07,193 INFO L226 Difference]: Without dead ends: 760 [2021-06-05 05:45:07,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1477.7ms TimeCoverageRelationStatistics Valid=409, Invalid=4013, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:45:07,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-06-05 05:45:07,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 622. [2021-06-05 05:45:07,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.028985507246377) internal successors, (1260), 621 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:07,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1260 transitions. [2021-06-05 05:45:07,198 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1260 transitions. Word has length 33 [2021-06-05 05:45:07,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:07,198 INFO L482 AbstractCegarLoop]: Abstraction has 622 states and 1260 transitions. [2021-06-05 05:45:07,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:07,199 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1260 transitions. [2021-06-05 05:45:07,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:07,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:07,199 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:07,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:07,400 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:07,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:07,400 INFO L82 PathProgramCache]: Analyzing trace with hash 480263807, now seen corresponding path program 72 times [2021-06-05 05:45:07,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:07,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209822949] [2021-06-05 05:45:07,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:07,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:07,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209822949] [2021-06-05 05:45:07,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209822949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:07,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473057349] [2021-06-05 05:45:07,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:07,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:45:07,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:07,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:45:07,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:08,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:08,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:45:08,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:45:08,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:08,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:08,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:08,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-06-05 05:45:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:08,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473057349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:08,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:08,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:45:08,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524594794] [2021-06-05 05:45:08,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:45:08,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:08,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:45:08,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:45:08,398 INFO L87 Difference]: Start difference. First operand 622 states and 1260 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:10,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:10,623 INFO L93 Difference]: Finished difference Result 971 states and 1938 transitions. [2021-06-05 05:45:10,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 05:45:10,623 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:10,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:10,624 INFO L225 Difference]: With dead ends: 971 [2021-06-05 05:45:10,624 INFO L226 Difference]: Without dead ends: 884 [2021-06-05 05:45:10,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 2107.5ms TimeCoverageRelationStatistics Valid=669, Invalid=6137, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 05:45:10,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-06-05 05:45:10,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 643. [2021-06-05 05:45:10,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.0373831775700935) internal successors, (1308), 642 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:10,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1308 transitions. [2021-06-05 05:45:10,630 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1308 transitions. Word has length 33 [2021-06-05 05:45:10,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:10,630 INFO L482 AbstractCegarLoop]: Abstraction has 643 states and 1308 transitions. [2021-06-05 05:45:10,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:10,630 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1308 transitions. [2021-06-05 05:45:10,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:10,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:10,631 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:10,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:10,832 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:10,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:10,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1906506173, now seen corresponding path program 73 times [2021-06-05 05:45:10,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:10,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626734161] [2021-06-05 05:45:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:11,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:11,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626734161] [2021-06-05 05:45:11,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626734161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:11,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118121814] [2021-06-05 05:45:11,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:11,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:11,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:11,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:11,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:11,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:45:11,300 INFO L388 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 27 treesize of output 13 [2021-06-05 05:45:11,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:11,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:11,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:11,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:45:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:11,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118121814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:11,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:11,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:45:11,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845781184] [2021-06-05 05:45:11,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:45:11,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:11,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:45:11,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:45:11,420 INFO L87 Difference]: Start difference. First operand 643 states and 1308 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:14,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:14,212 INFO L93 Difference]: Finished difference Result 1084 states and 2162 transitions. [2021-06-05 05:45:14,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 05:45:14,213 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:14,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:14,214 INFO L225 Difference]: With dead ends: 1084 [2021-06-05 05:45:14,214 INFO L226 Difference]: Without dead ends: 1005 [2021-06-05 05:45:14,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2984 ImplicationChecksByTransitivity, 2152.7ms TimeCoverageRelationStatistics Valid=852, Invalid=8460, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 05:45:14,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-06-05 05:45:14,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 648. [2021-06-05 05:45:14,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.034003091190108) internal successors, (1316), 647 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:14,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1316 transitions. [2021-06-05 05:45:14,221 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1316 transitions. Word has length 33 [2021-06-05 05:45:14,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:14,221 INFO L482 AbstractCegarLoop]: Abstraction has 648 states and 1316 transitions. [2021-06-05 05:45:14,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:14,221 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1316 transitions. [2021-06-05 05:45:14,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:14,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:14,222 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:14,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:14,422 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:14,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:14,422 INFO L82 PathProgramCache]: Analyzing trace with hash 991873427, now seen corresponding path program 74 times [2021-06-05 05:45:14,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:14,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799367759] [2021-06-05 05:45:14,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:14,704 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:14,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:14,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799367759] [2021-06-05 05:45:14,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799367759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:14,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9446511] [2021-06-05 05:45:14,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:14,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:45:14,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:14,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:14,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:14,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:14,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:14,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:45:14,938 INFO L388 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 27 treesize of output 13 [2021-06-05 05:45:14,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:14,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:14,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:14,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-06-05 05:45:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:15,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9446511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:15,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:15,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:45:15,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158539815] [2021-06-05 05:45:15,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:45:15,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:15,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:45:15,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:45:15,087 INFO L87 Difference]: Start difference. First operand 648 states and 1316 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:16,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:16,454 INFO L93 Difference]: Finished difference Result 858 states and 1713 transitions. [2021-06-05 05:45:16,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:45:16,455 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:16,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:16,456 INFO L225 Difference]: With dead ends: 858 [2021-06-05 05:45:16,456 INFO L226 Difference]: Without dead ends: 799 [2021-06-05 05:45:16,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1299.4ms TimeCoverageRelationStatistics Valid=404, Invalid=3886, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:45:16,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-06-05 05:45:16,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 661. [2021-06-05 05:45:16,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.0393939393939395) internal successors, (1346), 660 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:16,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1346 transitions. [2021-06-05 05:45:16,462 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1346 transitions. Word has length 33 [2021-06-05 05:45:16,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:16,462 INFO L482 AbstractCegarLoop]: Abstraction has 661 states and 1346 transitions. [2021-06-05 05:45:16,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:16,462 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1346 transitions. [2021-06-05 05:45:16,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:16,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:16,463 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:16,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:16,663 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:16,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:16,663 INFO L82 PathProgramCache]: Analyzing trace with hash 995289705, now seen corresponding path program 75 times [2021-06-05 05:45:16,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:16,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551674005] [2021-06-05 05:45:16,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:16,915 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:16,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:16,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551674005] [2021-06-05 05:45:16,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551674005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:16,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805021296] [2021-06-05 05:45:16,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:16,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:45:16,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:16,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:16,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:17,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:17,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:17,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:45:17,200 INFO L388 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 27 treesize of output 13 [2021-06-05 05:45:17,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:17,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:17,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:17,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:45:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:17,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805021296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:17,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:17,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:45:17,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839174474] [2021-06-05 05:45:17,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:45:17,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:17,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:45:17,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:45:17,318 INFO L87 Difference]: Start difference. First operand 661 states and 1346 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:19,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:19,379 INFO L93 Difference]: Finished difference Result 923 states and 1836 transitions. [2021-06-05 05:45:19,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 05:45:19,384 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:19,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:19,384 INFO L225 Difference]: With dead ends: 923 [2021-06-05 05:45:19,384 INFO L226 Difference]: Without dead ends: 835 [2021-06-05 05:45:19,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 1825.0ms TimeCoverageRelationStatistics Valid=495, Invalid=5357, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:45:19,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-06-05 05:45:19,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 716. [2021-06-05 05:45:19,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.0377622377622377) internal successors, (1457), 715 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:19,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1457 transitions. [2021-06-05 05:45:19,390 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1457 transitions. Word has length 33 [2021-06-05 05:45:19,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:19,391 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1457 transitions. [2021-06-05 05:45:19,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:19,391 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1457 transitions. [2021-06-05 05:45:19,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:19,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:19,391 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:19,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:19,592 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:19,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:19,592 INFO L82 PathProgramCache]: Analyzing trace with hash 354179115, now seen corresponding path program 76 times [2021-06-05 05:45:19,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:19,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579162491] [2021-06-05 05:45:19,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:19,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:19,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579162491] [2021-06-05 05:45:19,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579162491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:19,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845803075] [2021-06-05 05:45:19,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:19,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:45:19,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:19,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:19,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:20,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:20,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:20,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:45:20,072 INFO L388 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 27 treesize of output 13 [2021-06-05 05:45:20,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:20,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:20,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:20,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:45:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:20,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845803075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:20,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:20,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:45:20,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919282737] [2021-06-05 05:45:20,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:45:20,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:20,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:45:20,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:45:20,190 INFO L87 Difference]: Start difference. First operand 716 states and 1457 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:22,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:22,282 INFO L93 Difference]: Finished difference Result 1025 states and 2053 transitions. [2021-06-05 05:45:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 05:45:22,282 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:22,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:22,283 INFO L225 Difference]: With dead ends: 1025 [2021-06-05 05:45:22,283 INFO L226 Difference]: Without dead ends: 945 [2021-06-05 05:45:22,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 1844.4ms TimeCoverageRelationStatistics Valid=619, Invalid=6521, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 05:45:22,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-06-05 05:45:22,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 735. [2021-06-05 05:45:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 2.0395095367847413) internal successors, (1497), 734 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1497 transitions. [2021-06-05 05:45:22,290 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1497 transitions. Word has length 33 [2021-06-05 05:45:22,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:22,290 INFO L482 AbstractCegarLoop]: Abstraction has 735 states and 1497 transitions. [2021-06-05 05:45:22,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:22,290 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1497 transitions. [2021-06-05 05:45:22,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:22,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:22,291 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:22,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:22,491 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:22,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:22,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1780421481, now seen corresponding path program 77 times [2021-06-05 05:45:22,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:22,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993958871] [2021-06-05 05:45:22,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:22,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:22,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:22,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993958871] [2021-06-05 05:45:22,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993958871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:22,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875494393] [2021-06-05 05:45:22,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:22,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:45:22,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:22,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:45:22,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:22,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:22,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:45:22,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:45:22,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:22,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:22,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:22,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-06-05 05:45:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:23,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875494393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:23,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:23,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:45:23,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259879839] [2021-06-05 05:45:23,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:45:23,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:23,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:45:23,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:45:23,108 INFO L87 Difference]: Start difference. First operand 735 states and 1497 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:25,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:25,583 INFO L93 Difference]: Finished difference Result 999 states and 2002 transitions. [2021-06-05 05:45:25,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 05:45:25,583 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:25,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:25,584 INFO L225 Difference]: With dead ends: 999 [2021-06-05 05:45:25,584 INFO L226 Difference]: Without dead ends: 943 [2021-06-05 05:45:25,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2517 ImplicationChecksByTransitivity, 2003.7ms TimeCoverageRelationStatistics Valid=706, Invalid=7304, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 05:45:25,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-05 05:45:25,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 734. [2021-06-05 05:45:25,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.03956343792633) internal successors, (1495), 733 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:25,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1495 transitions. [2021-06-05 05:45:25,592 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1495 transitions. Word has length 33 [2021-06-05 05:45:25,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:25,592 INFO L482 AbstractCegarLoop]: Abstraction has 734 states and 1495 transitions. [2021-06-05 05:45:25,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:25,592 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1495 transitions. [2021-06-05 05:45:25,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:25,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:25,593 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:25,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:25,809 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:25,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:25,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1675574863, now seen corresponding path program 78 times [2021-06-05 05:45:25,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:25,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163629108] [2021-06-05 05:45:25,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:26,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:26,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163629108] [2021-06-05 05:45:26,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163629108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:26,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563524284] [2021-06-05 05:45:26,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:26,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:45:26,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:26,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:45:26,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:26,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:45:26,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:26,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:45:26,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:26,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:26,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:26,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:16 [2021-06-05 05:45:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:26,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563524284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:26,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:26,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:45:26,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597000270] [2021-06-05 05:45:26,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:45:26,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:26,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:45:26,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:45:26,453 INFO L87 Difference]: Start difference. First operand 734 states and 1495 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:27,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:27,930 INFO L93 Difference]: Finished difference Result 987 states and 1977 transitions. [2021-06-05 05:45:27,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:45:27,931 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:27,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:27,931 INFO L225 Difference]: With dead ends: 987 [2021-06-05 05:45:27,931 INFO L226 Difference]: Without dead ends: 931 [2021-06-05 05:45:27,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1357.1ms TimeCoverageRelationStatistics Valid=428, Invalid=3994, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:45:27,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-06-05 05:45:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 817. [2021-06-05 05:45:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 2.0379901960784315) internal successors, (1663), 816 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:27,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1663 transitions. [2021-06-05 05:45:27,939 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1663 transitions. Word has length 33 [2021-06-05 05:45:27,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:27,939 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 1663 transitions. [2021-06-05 05:45:27,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:27,939 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1663 transitions. [2021-06-05 05:45:27,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:27,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:27,940 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:28,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 05:45:28,140 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:28,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:28,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1261063915, now seen corresponding path program 79 times [2021-06-05 05:45:28,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:28,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339749233] [2021-06-05 05:45:28,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:28,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:28,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339749233] [2021-06-05 05:45:28,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339749233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:28,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490938128] [2021-06-05 05:45:28,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:28,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:28,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:28,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:28,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:28,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:45:28,662 INFO L388 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 27 treesize of output 13 [2021-06-05 05:45:28,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:28,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:28,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:28,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:45:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:28,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490938128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:28,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:28,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:45:28,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497861521] [2021-06-05 05:45:28,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:45:28,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:28,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:45:28,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:45:28,758 INFO L87 Difference]: Start difference. First operand 817 states and 1663 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:29,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:29,739 INFO L93 Difference]: Finished difference Result 1026 states and 2044 transitions. [2021-06-05 05:45:29,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:45:29,739 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:29,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:29,740 INFO L225 Difference]: With dead ends: 1026 [2021-06-05 05:45:29,740 INFO L226 Difference]: Without dead ends: 930 [2021-06-05 05:45:29,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 975.1ms TimeCoverageRelationStatistics Valid=275, Invalid=2805, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:45:29,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-06-05 05:45:29,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 842. [2021-06-05 05:45:29,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 2.036860879904875) internal successors, (1713), 841 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:29,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1713 transitions. [2021-06-05 05:45:29,748 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1713 transitions. Word has length 33 [2021-06-05 05:45:29,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:29,748 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 1713 transitions. [2021-06-05 05:45:29,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:29,748 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1713 transitions. [2021-06-05 05:45:29,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:29,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:29,749 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:29,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:29,965 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:29,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:29,965 INFO L82 PathProgramCache]: Analyzing trace with hash 124558675, now seen corresponding path program 80 times [2021-06-05 05:45:29,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:29,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477509200] [2021-06-05 05:45:29,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:30,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:30,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477509200] [2021-06-05 05:45:30,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477509200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:30,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768236433] [2021-06-05 05:45:30,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:30,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:45:30,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:30,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:30,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:30,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:30,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:30,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:45:30,525 INFO L388 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 27 treesize of output 13 [2021-06-05 05:45:30,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:30,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:30,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:30,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:45:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:30,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768236433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:30,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:30,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:45:30,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289254819] [2021-06-05 05:45:30,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:45:30,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:30,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:45:30,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:45:30,623 INFO L87 Difference]: Start difference. First operand 842 states and 1713 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:31,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:31,658 INFO L93 Difference]: Finished difference Result 1041 states and 2080 transitions. [2021-06-05 05:45:31,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:45:31,658 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:31,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:31,659 INFO L225 Difference]: With dead ends: 1041 [2021-06-05 05:45:31,659 INFO L226 Difference]: Without dead ends: 953 [2021-06-05 05:45:31,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 1025.4ms TimeCoverageRelationStatistics Valid=279, Invalid=2801, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:45:31,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-06-05 05:45:31,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 845. [2021-06-05 05:45:31,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 2.036729857819905) internal successors, (1719), 844 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:31,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1719 transitions. [2021-06-05 05:45:31,667 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1719 transitions. Word has length 33 [2021-06-05 05:45:31,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:31,667 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 1719 transitions. [2021-06-05 05:45:31,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:31,667 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1719 transitions. [2021-06-05 05:45:31,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:31,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:31,668 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:31,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 05:45:31,868 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:31,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:31,869 INFO L82 PathProgramCache]: Analyzing trace with hash -516551915, now seen corresponding path program 81 times [2021-06-05 05:45:31,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:31,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664991252] [2021-06-05 05:45:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:32,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:32,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664991252] [2021-06-05 05:45:32,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664991252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:32,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804231754] [2021-06-05 05:45:32,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:32,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:45:32,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:32,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:32,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:32,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:32,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:32,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:45:32,349 INFO L388 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 27 treesize of output 13 [2021-06-05 05:45:32,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:32,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:32,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:32,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:45:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:32,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804231754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:32,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:32,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:45:32,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754269726] [2021-06-05 05:45:32,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:45:32,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:32,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:45:32,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:45:32,488 INFO L87 Difference]: Start difference. First operand 845 states and 1719 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:34,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:34,085 INFO L93 Difference]: Finished difference Result 1128 states and 2259 transitions. [2021-06-05 05:45:34,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:45:34,086 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:34,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:34,086 INFO L225 Difference]: With dead ends: 1128 [2021-06-05 05:45:34,086 INFO L226 Difference]: Without dead ends: 1032 [2021-06-05 05:45:34,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 1389.0ms TimeCoverageRelationStatistics Valid=481, Invalid=4489, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:45:34,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-06-05 05:45:34,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 850. [2021-06-05 05:45:34,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.035335689045936) internal successors, (1728), 849 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:34,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1728 transitions. [2021-06-05 05:45:34,094 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1728 transitions. Word has length 33 [2021-06-05 05:45:34,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:34,095 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 1728 transitions. [2021-06-05 05:45:34,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:34,095 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1728 transitions. [2021-06-05 05:45:34,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:34,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:34,096 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:34,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:34,309 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:34,309 INFO L82 PathProgramCache]: Analyzing trace with hash 909690451, now seen corresponding path program 82 times [2021-06-05 05:45:34,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:34,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412944523] [2021-06-05 05:45:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:34,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:34,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412944523] [2021-06-05 05:45:34,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412944523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:34,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349482647] [2021-06-05 05:45:34,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:34,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:45:34,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:34,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:34,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:34,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:34,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:45:34,761 INFO L388 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 27 treesize of output 13 [2021-06-05 05:45:34,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:34,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:34,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:34,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:45:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:34,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349482647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:34,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:34,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-06-05 05:45:34,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357974153] [2021-06-05 05:45:34,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:45:34,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:34,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:45:34,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:45:34,887 INFO L87 Difference]: Start difference. First operand 850 states and 1728 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:36,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:36,881 INFO L93 Difference]: Finished difference Result 1294 states and 2586 transitions. [2021-06-05 05:45:36,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 05:45:36,882 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:36,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:36,883 INFO L225 Difference]: With dead ends: 1294 [2021-06-05 05:45:36,883 INFO L226 Difference]: Without dead ends: 1216 [2021-06-05 05:45:36,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 1736.9ms TimeCoverageRelationStatistics Valid=666, Invalid=6306, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 05:45:36,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-06-05 05:45:36,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 841. [2021-06-05 05:45:36,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 2.033333333333333) internal successors, (1708), 840 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:36,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1708 transitions. [2021-06-05 05:45:36,891 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1708 transitions. Word has length 33 [2021-06-05 05:45:36,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:36,891 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 1708 transitions. [2021-06-05 05:45:36,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1708 transitions. [2021-06-05 05:45:36,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:36,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:36,892 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:37,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:37,093 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:37,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:37,093 INFO L82 PathProgramCache]: Analyzing trace with hash -4942295, now seen corresponding path program 83 times [2021-06-05 05:45:37,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:37,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776398727] [2021-06-05 05:45:37,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:37,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:37,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776398727] [2021-06-05 05:45:37,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776398727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:37,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887199266] [2021-06-05 05:45:37,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:37,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:45:37,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:37,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:37,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:37,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:37,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:45:37,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:45:37,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:37,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:37,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:37,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:16 [2021-06-05 05:45:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:37,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887199266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:37,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:37,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-06-05 05:45:37,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967599544] [2021-06-05 05:45:37,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:45:37,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:37,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:45:37,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:45:37,810 INFO L87 Difference]: Start difference. First operand 841 states and 1708 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:39,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:39,394 INFO L93 Difference]: Finished difference Result 1073 states and 2135 transitions. [2021-06-05 05:45:39,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:45:39,394 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:39,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:39,395 INFO L225 Difference]: With dead ends: 1073 [2021-06-05 05:45:39,395 INFO L226 Difference]: Without dead ends: 995 [2021-06-05 05:45:39,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 1509.7ms TimeCoverageRelationStatistics Valid=533, Invalid=5017, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:45:39,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-06-05 05:45:39,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 862. [2021-06-05 05:45:39,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.032520325203252) internal successors, (1750), 861 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:39,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1750 transitions. [2021-06-05 05:45:39,403 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1750 transitions. Word has length 33 [2021-06-05 05:45:39,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:39,403 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 1750 transitions. [2021-06-05 05:45:39,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:39,403 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1750 transitions. [2021-06-05 05:45:39,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:39,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:39,404 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:39,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:39,605 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:39,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:39,605 INFO L82 PathProgramCache]: Analyzing trace with hash 491236367, now seen corresponding path program 84 times [2021-06-05 05:45:39,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:39,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670228932] [2021-06-05 05:45:39,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:39,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:39,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670228932] [2021-06-05 05:45:39,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670228932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:39,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975730712] [2021-06-05 05:45:39,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:39,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:45:39,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:39,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:39,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:40,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:40,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:40,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:45:40,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:45:40,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:40,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:40,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:40,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-06-05 05:45:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:40,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975730712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:40,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:40,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-06-05 05:45:40,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667865768] [2021-06-05 05:45:40,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:45:40,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:40,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:45:40,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:45:40,232 INFO L87 Difference]: Start difference. First operand 862 states and 1750 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:41,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:41,310 INFO L93 Difference]: Finished difference Result 1056 states and 2102 transitions. [2021-06-05 05:45:41,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:45:41,310 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:41,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:41,311 INFO L225 Difference]: With dead ends: 1056 [2021-06-05 05:45:41,311 INFO L226 Difference]: Without dead ends: 968 [2021-06-05 05:45:41,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1035.9ms TimeCoverageRelationStatistics Valid=305, Invalid=2887, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:45:41,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-06-05 05:45:41,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 884. [2021-06-05 05:45:41,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.029445073612684) internal successors, (1792), 883 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:41,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1792 transitions. [2021-06-05 05:45:41,319 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1792 transitions. Word has length 33 [2021-06-05 05:45:41,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:41,319 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 1792 transitions. [2021-06-05 05:45:41,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:41,319 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1792 transitions. [2021-06-05 05:45:41,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:41,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:41,320 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:41,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:41,520 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:41,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:41,520 INFO L82 PathProgramCache]: Analyzing trace with hash -149874223, now seen corresponding path program 85 times [2021-06-05 05:45:41,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:41,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753700136] [2021-06-05 05:45:41,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:41,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:41,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753700136] [2021-06-05 05:45:41,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753700136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:41,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350398641] [2021-06-05 05:45:41,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:41,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:41,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:41,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:45:41,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:41,970 INFO L388 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 27 treesize of output 13 [2021-06-05 05:45:41,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:41,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:41,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:41,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:45:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:42,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350398641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:42,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:42,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-06-05 05:45:42,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089085851] [2021-06-05 05:45:42,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:45:42,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:42,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:45:42,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:45:42,090 INFO L87 Difference]: Start difference. First operand 884 states and 1792 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:43,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:43,381 INFO L93 Difference]: Finished difference Result 1078 states and 2150 transitions. [2021-06-05 05:45:43,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:45:43,382 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:43,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:43,383 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 05:45:43,383 INFO L226 Difference]: Without dead ends: 1006 [2021-06-05 05:45:43,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 1247.7ms TimeCoverageRelationStatistics Valid=408, Invalid=3752, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:45:43,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-06-05 05:45:43,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 885. [2021-06-05 05:45:43,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.0294117647058822) internal successors, (1794), 884 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:43,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1794 transitions. [2021-06-05 05:45:43,391 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1794 transitions. Word has length 33 [2021-06-05 05:45:43,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:43,391 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 1794 transitions. [2021-06-05 05:45:43,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:43,391 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1794 transitions. [2021-06-05 05:45:43,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:43,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:43,392 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:43,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:43,608 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:43,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:43,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1276368143, now seen corresponding path program 86 times [2021-06-05 05:45:43,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:43,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597838654] [2021-06-05 05:45:43,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:43,821 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:43,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:43,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597838654] [2021-06-05 05:45:43,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597838654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:43,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614016026] [2021-06-05 05:45:43,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:43,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:45:43,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:43,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:43,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:44,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:44,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:45:44,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:45:44,056 INFO L388 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 27 treesize of output 13 [2021-06-05 05:45:44,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:44,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:44,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:44,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:45:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:44,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614016026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:44,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:44,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-06-05 05:45:44,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814055136] [2021-06-05 05:45:44,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:45:44,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:44,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:45:44,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:45:44,171 INFO L87 Difference]: Start difference. First operand 885 states and 1794 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:45,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:45,962 INFO L93 Difference]: Finished difference Result 1116 states and 2231 transitions. [2021-06-05 05:45:45,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:45:45,963 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:45,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:45,964 INFO L225 Difference]: With dead ends: 1116 [2021-06-05 05:45:45,964 INFO L226 Difference]: Without dead ends: 1054 [2021-06-05 05:45:45,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 1555.9ms TimeCoverageRelationStatistics Valid=520, Invalid=4592, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:45:45,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-06-05 05:45:45,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 875. [2021-06-05 05:45:45,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.028604118993135) internal successors, (1773), 874 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:45,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1773 transitions. [2021-06-05 05:45:45,972 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1773 transitions. Word has length 33 [2021-06-05 05:45:45,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:45,972 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 1773 transitions. [2021-06-05 05:45:45,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:45,972 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1773 transitions. [2021-06-05 05:45:45,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:45,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:45,973 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:46,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:46,175 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:46,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:46,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1501435129, now seen corresponding path program 87 times [2021-06-05 05:45:46,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:46,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748878072] [2021-06-05 05:45:46,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:46,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:46,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748878072] [2021-06-05 05:45:46,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748878072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:46,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185433239] [2021-06-05 05:45:46,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:46,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:45:46,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:46,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:46,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:46,624 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:45:46,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:45:46,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:46,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:46,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:46,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:45:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:46,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185433239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:46,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:46,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:45:46,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173914229] [2021-06-05 05:45:46,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:45:46,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:46,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:45:46,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:45:46,735 INFO L87 Difference]: Start difference. First operand 875 states and 1773 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:47,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:47,494 INFO L93 Difference]: Finished difference Result 1029 states and 2048 transitions. [2021-06-05 05:45:47,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:45:47,494 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:47,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:47,495 INFO L225 Difference]: With dead ends: 1029 [2021-06-05 05:45:47,495 INFO L226 Difference]: Without dead ends: 981 [2021-06-05 05:45:47,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 745.5ms TimeCoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:45:47,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-06-05 05:45:47,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 896. [2021-06-05 05:45:47,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 2.029050279329609) internal successors, (1816), 895 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:47,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1816 transitions. [2021-06-05 05:45:47,502 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1816 transitions. Word has length 33 [2021-06-05 05:45:47,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:47,503 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 1816 transitions. [2021-06-05 05:45:47,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:47,503 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1816 transitions. [2021-06-05 05:45:47,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:47,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:47,504 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:47,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 05:45:47,704 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:47,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:47,704 INFO L82 PathProgramCache]: Analyzing trace with hash -222063415, now seen corresponding path program 88 times [2021-06-05 05:45:47,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:47,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990155055] [2021-06-05 05:45:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:47,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:47,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990155055] [2021-06-05 05:45:47,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990155055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:47,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86542080] [2021-06-05 05:45:47,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:47,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:45:47,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:47,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:47,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:48,137 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:45:48,138 INFO L388 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 13 [2021-06-05 05:45:48,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:48,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:48,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:48,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:45:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:48,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86542080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:48,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:48,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:45:48,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328353003] [2021-06-05 05:45:48,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:45:48,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:48,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:45:48,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:45:48,235 INFO L87 Difference]: Start difference. First operand 896 states and 1816 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:49,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:49,167 INFO L93 Difference]: Finished difference Result 1066 states and 2115 transitions. [2021-06-05 05:45:49,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:45:49,167 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:49,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:49,168 INFO L225 Difference]: With dead ends: 1066 [2021-06-05 05:45:49,168 INFO L226 Difference]: Without dead ends: 1018 [2021-06-05 05:45:49,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 756.9ms TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:45:49,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-06-05 05:45:49,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 897. [2021-06-05 05:45:49,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 2.029017857142857) internal successors, (1818), 896 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:49,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1818 transitions. [2021-06-05 05:45:49,175 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1818 transitions. Word has length 33 [2021-06-05 05:45:49,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:49,175 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 1818 transitions. [2021-06-05 05:45:49,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:49,175 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1818 transitions. [2021-06-05 05:45:49,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:49,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:49,176 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:49,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:49,377 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:49,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:49,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1163559175, now seen corresponding path program 89 times [2021-06-05 05:45:49,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:49,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854978501] [2021-06-05 05:45:49,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:49,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:49,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854978501] [2021-06-05 05:45:49,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854978501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:49,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022849323] [2021-06-05 05:45:49,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:49,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:45:49,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:49,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:49,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:49,805 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:45:49,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:45:49,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:49,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:49,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:49,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:45:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:49,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022849323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:49,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:49,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-06-05 05:45:49,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410858488] [2021-06-05 05:45:49,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:45:49,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:49,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:45:49,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:45:49,942 INFO L87 Difference]: Start difference. First operand 897 states and 1818 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:51,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:51,129 INFO L93 Difference]: Finished difference Result 1104 states and 2193 transitions. [2021-06-05 05:45:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:45:51,129 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:51,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:51,130 INFO L225 Difference]: With dead ends: 1104 [2021-06-05 05:45:51,130 INFO L226 Difference]: Without dead ends: 1056 [2021-06-05 05:45:51,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 870.5ms TimeCoverageRelationStatistics Valid=235, Invalid=2521, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:45:51,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-06-05 05:45:51,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 901. [2021-06-05 05:45:51,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 2.028888888888889) internal successors, (1826), 900 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1826 transitions. [2021-06-05 05:45:51,138 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1826 transitions. Word has length 33 [2021-06-05 05:45:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:51,138 INFO L482 AbstractCegarLoop]: Abstraction has 901 states and 1826 transitions. [2021-06-05 05:45:51,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:51,138 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1826 transitions. [2021-06-05 05:45:51,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:51,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:51,139 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:51,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 05:45:51,339 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:51,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:51,339 INFO L82 PathProgramCache]: Analyzing trace with hash 522448585, now seen corresponding path program 90 times [2021-06-05 05:45:51,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:51,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355682619] [2021-06-05 05:45:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:51,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:51,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355682619] [2021-06-05 05:45:51,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355682619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:51,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797546769] [2021-06-05 05:45:51,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:51,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:45:51,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:51,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:45:51,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:51,746 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:45:51,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:45:51,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:51,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:51,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:51,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:45:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:51,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797546769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:51,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:51,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:45:51,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587392934] [2021-06-05 05:45:51,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:45:51,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:51,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:45:51,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:45:51,865 INFO L87 Difference]: Start difference. First operand 901 states and 1826 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:52,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:52,879 INFO L93 Difference]: Finished difference Result 1137 states and 2262 transitions. [2021-06-05 05:45:52,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:45:52,880 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:52,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:52,881 INFO L225 Difference]: With dead ends: 1137 [2021-06-05 05:45:52,881 INFO L226 Difference]: Without dead ends: 1105 [2021-06-05 05:45:52,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 866.6ms TimeCoverageRelationStatistics Valid=250, Invalid=2506, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:45:52,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-06-05 05:45:52,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 902. [2021-06-05 05:45:52,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.0288568257491675) internal successors, (1828), 901 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:52,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1828 transitions. [2021-06-05 05:45:52,888 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1828 transitions. Word has length 33 [2021-06-05 05:45:52,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:52,888 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 1828 transitions. [2021-06-05 05:45:52,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:52,888 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1828 transitions. [2021-06-05 05:45:52,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:52,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:52,889 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:53,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:53,090 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:53,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:53,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1948690951, now seen corresponding path program 91 times [2021-06-05 05:45:53,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:53,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555468446] [2021-06-05 05:45:53,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:53,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:53,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:53,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555468446] [2021-06-05 05:45:53,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555468446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:53,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290129532] [2021-06-05 05:45:53,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:53,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:53,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:53,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:53,496 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:45:53,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:45:53,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:53,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:53,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:53,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:45:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:53,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290129532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:53,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:53,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:45:53,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165084503] [2021-06-05 05:45:53,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:45:53,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:53,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:45:53,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:45:53,616 INFO L87 Difference]: Start difference. First operand 902 states and 1828 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:54,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:54,891 INFO L93 Difference]: Finished difference Result 1204 states and 2391 transitions. [2021-06-05 05:45:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:45:54,891 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:54,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:54,892 INFO L225 Difference]: With dead ends: 1204 [2021-06-05 05:45:54,892 INFO L226 Difference]: Without dead ends: 1160 [2021-06-05 05:45:54,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 1020.0ms TimeCoverageRelationStatistics Valid=303, Invalid=3237, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:45:54,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-06-05 05:45:54,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 898. [2021-06-05 05:45:54,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 2.0256410256410255) internal successors, (1817), 897 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:54,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1817 transitions. [2021-06-05 05:45:54,900 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1817 transitions. Word has length 33 [2021-06-05 05:45:54,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:54,900 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 1817 transitions. [2021-06-05 05:45:54,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:54,900 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1817 transitions. [2021-06-05 05:45:54,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:54,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:54,901 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:55,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 05:45:55,117 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:55,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:55,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1310975239, now seen corresponding path program 92 times [2021-06-05 05:45:55,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:55,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354427484] [2021-06-05 05:45:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:55,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:55,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354427484] [2021-06-05 05:45:55,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354427484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:55,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252693195] [2021-06-05 05:45:55,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:55,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:45:55,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:55,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:55,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:55,556 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:45:55,556 INFO L388 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 13 [2021-06-05 05:45:55,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:55,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:55,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:55,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-06-05 05:45:55,709 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:55,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252693195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:55,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:55,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:45:55,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855554030] [2021-06-05 05:45:55,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:45:55,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:55,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:45:55,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:45:55,710 INFO L87 Difference]: Start difference. First operand 898 states and 1817 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:56,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:56,405 INFO L93 Difference]: Finished difference Result 1027 states and 2063 transitions. [2021-06-05 05:45:56,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:45:56,405 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:56,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:56,406 INFO L225 Difference]: With dead ends: 1027 [2021-06-05 05:45:56,406 INFO L226 Difference]: Without dead ends: 999 [2021-06-05 05:45:56,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 811.0ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:45:56,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-06-05 05:45:56,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 890. [2021-06-05 05:45:56,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 2.0258717660292462) internal successors, (1801), 889 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1801 transitions. [2021-06-05 05:45:56,414 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1801 transitions. Word has length 33 [2021-06-05 05:45:56,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:56,414 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 1801 transitions. [2021-06-05 05:45:56,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:56,414 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1801 transitions. [2021-06-05 05:45:56,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:56,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:56,415 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:56,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 05:45:56,615 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:56,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:56,615 INFO L82 PathProgramCache]: Analyzing trace with hash -507368251, now seen corresponding path program 93 times [2021-06-05 05:45:56,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:56,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788214031] [2021-06-05 05:45:56,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:56,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:56,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788214031] [2021-06-05 05:45:56,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788214031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:56,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730799520] [2021-06-05 05:45:56,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:56,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:45:56,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:56,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:56,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:57,062 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:45:57,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:45:57,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:57,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:57,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:57,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:45:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:57,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730799520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:57,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:57,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:45:57,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901734689] [2021-06-05 05:45:57,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:45:57,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:57,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:45:57,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:45:57,159 INFO L87 Difference]: Start difference. First operand 890 states and 1801 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:58,164 INFO L93 Difference]: Finished difference Result 1070 states and 2128 transitions. [2021-06-05 05:45:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:45:58,165 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:45:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:58,166 INFO L225 Difference]: With dead ends: 1070 [2021-06-05 05:45:58,166 INFO L226 Difference]: Without dead ends: 974 [2021-06-05 05:45:58,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 973.7ms TimeCoverageRelationStatistics Valid=292, Invalid=3130, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:45:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-06-05 05:45:58,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 907. [2021-06-05 05:45:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.0275938189845473) internal successors, (1837), 906 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:58,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1837 transitions. [2021-06-05 05:45:58,173 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1837 transitions. Word has length 33 [2021-06-05 05:45:58,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:58,173 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 1837 transitions. [2021-06-05 05:45:58,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:58,173 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1837 transitions. [2021-06-05 05:45:58,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:45:58,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:58,174 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:58,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 05:45:58,377 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:58,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:58,377 INFO L82 PathProgramCache]: Analyzing trace with hash 878254339, now seen corresponding path program 94 times [2021-06-05 05:45:58,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:58,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956747209] [2021-06-05 05:45:58,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:58,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:58,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956747209] [2021-06-05 05:45:58,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956747209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:58,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47428491] [2021-06-05 05:45:58,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:58,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:45:58,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:58,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:45:58,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:58,837 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:45:58,838 INFO L388 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 13 [2021-06-05 05:45:58,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:45:58,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:45:58,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:45:58,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:45:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:58,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47428491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:58,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:58,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:45:58,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455586200] [2021-06-05 05:45:58,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:45:58,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:58,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:45:58,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:45:58,934 INFO L87 Difference]: Start difference. First operand 907 states and 1837 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:00,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:00,368 INFO L93 Difference]: Finished difference Result 1128 states and 2252 transitions. [2021-06-05 05:46:00,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:46:00,368 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:46:00,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:00,369 INFO L225 Difference]: With dead ends: 1128 [2021-06-05 05:46:00,369 INFO L226 Difference]: Without dead ends: 1033 [2021-06-05 05:46:00,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 1206.2ms TimeCoverageRelationStatistics Valid=383, Invalid=3907, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:46:00,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-06-05 05:46:00,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 916. [2021-06-05 05:46:00,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 2.0273224043715845) internal successors, (1855), 915 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:00,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1855 transitions. [2021-06-05 05:46:00,377 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1855 transitions. Word has length 33 [2021-06-05 05:46:00,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:00,377 INFO L482 AbstractCegarLoop]: Abstraction has 916 states and 1855 transitions. [2021-06-05 05:46:00,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:00,377 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1855 transitions. [2021-06-05 05:46:00,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:00,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:00,378 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:00,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:00,585 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:00,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:00,585 INFO L82 PathProgramCache]: Analyzing trace with hash 237143749, now seen corresponding path program 95 times [2021-06-05 05:46:00,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:00,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371070826] [2021-06-05 05:46:00,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:00,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:00,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371070826] [2021-06-05 05:46:00,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371070826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:00,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167862107] [2021-06-05 05:46:00,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:00,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:46:00,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:00,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 05:46:00,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:01,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:46:01,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:46:01,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:46:01,073 INFO L388 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 27 treesize of output 13 [2021-06-05 05:46:01,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:01,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:01,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:01,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:46:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:01,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167862107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:01,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:01,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-06-05 05:46:01,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029683201] [2021-06-05 05:46:01,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:46:01,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:01,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:46:01,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:46:01,233 INFO L87 Difference]: Start difference. First operand 916 states and 1855 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:03,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:03,269 INFO L93 Difference]: Finished difference Result 1153 states and 2299 transitions. [2021-06-05 05:46:03,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:46:03,270 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:46:03,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:03,270 INFO L225 Difference]: With dead ends: 1153 [2021-06-05 05:46:03,270 INFO L226 Difference]: Without dead ends: 1073 [2021-06-05 05:46:03,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 1605.4ms TimeCoverageRelationStatistics Valid=582, Invalid=5270, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:46:03,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-06-05 05:46:03,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 912. [2021-06-05 05:46:03,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 2.0241492864983535) internal successors, (1844), 911 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:03,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1844 transitions. [2021-06-05 05:46:03,278 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1844 transitions. Word has length 33 [2021-06-05 05:46:03,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:03,278 INFO L482 AbstractCegarLoop]: Abstraction has 912 states and 1844 transitions. [2021-06-05 05:46:03,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:03,279 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1844 transitions. [2021-06-05 05:46:03,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:03,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:03,279 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:03,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 05:46:03,480 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:03,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:03,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1663386115, now seen corresponding path program 96 times [2021-06-05 05:46:03,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:03,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312600382] [2021-06-05 05:46:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:03,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:03,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312600382] [2021-06-05 05:46:03,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312600382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:03,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194705535] [2021-06-05 05:46:03,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:03,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:46:03,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:03,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:46:03,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:03,887 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:46:03,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:46:03,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:03,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:03,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:03,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:46:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:04,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194705535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:04,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:04,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:04,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329185981] [2021-06-05 05:46:04,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:04,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:04,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:04,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:04,005 INFO L87 Difference]: Start difference. First operand 912 states and 1844 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:05,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:05,832 INFO L93 Difference]: Finished difference Result 1223 states and 2439 transitions. [2021-06-05 05:46:05,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:46:05,837 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:46:05,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:05,838 INFO L225 Difference]: With dead ends: 1223 [2021-06-05 05:46:05,838 INFO L226 Difference]: Without dead ends: 1164 [2021-06-05 05:46:05,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 1403.8ms TimeCoverageRelationStatistics Valid=559, Invalid=4843, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:46:05,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-06-05 05:46:05,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 907. [2021-06-05 05:46:05,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.0242825607064017) internal successors, (1834), 906 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1834 transitions. [2021-06-05 05:46:05,846 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1834 transitions. Word has length 33 [2021-06-05 05:46:05,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:05,846 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 1834 transitions. [2021-06-05 05:46:05,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:05,846 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1834 transitions. [2021-06-05 05:46:05,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:05,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:05,847 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:06,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:06,062 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:06,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:06,063 INFO L82 PathProgramCache]: Analyzing trace with hash 748753369, now seen corresponding path program 97 times [2021-06-05 05:46:06,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:06,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428954545] [2021-06-05 05:46:06,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:06,268 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:06,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:06,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428954545] [2021-06-05 05:46:06,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428954545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:06,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148641558] [2021-06-05 05:46:06,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:06,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:46:06,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:06,458 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:46:06,459 INFO L388 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 13 [2021-06-05 05:46:06,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:06,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:06,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:06,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-06-05 05:46:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:06,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148641558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:06,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:06,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:06,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181660644] [2021-06-05 05:46:06,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:06,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:06,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:06,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:06,613 INFO L87 Difference]: Start difference. First operand 907 states and 1834 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:07,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:07,984 INFO L93 Difference]: Finished difference Result 1093 states and 2183 transitions. [2021-06-05 05:46:07,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:46:07,984 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:46:07,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:07,985 INFO L225 Difference]: With dead ends: 1093 [2021-06-05 05:46:07,985 INFO L226 Difference]: Without dead ends: 1034 [2021-06-05 05:46:07,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 1229.1ms TimeCoverageRelationStatistics Valid=413, Invalid=4009, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:46:07,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-06-05 05:46:07,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 922. [2021-06-05 05:46:07,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.023887079261672) internal successors, (1864), 921 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:07,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1864 transitions. [2021-06-05 05:46:07,993 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1864 transitions. Word has length 33 [2021-06-05 05:46:07,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:07,993 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 1864 transitions. [2021-06-05 05:46:07,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:07,993 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1864 transitions. [2021-06-05 05:46:07,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:07,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:07,993 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:08,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 05:46:08,195 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:08,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:08,195 INFO L82 PathProgramCache]: Analyzing trace with hash -834683145, now seen corresponding path program 98 times [2021-06-05 05:46:08,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:08,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416670400] [2021-06-05 05:46:08,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:08,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:08,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416670400] [2021-06-05 05:46:08,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416670400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:08,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506703411] [2021-06-05 05:46:08,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:08,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:46:08,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:08,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:46:08,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:08,649 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:46:08,650 INFO L388 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 13 [2021-06-05 05:46:08,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:08,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:08,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:08,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:46:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:08,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506703411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:08,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:08,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:08,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570344927] [2021-06-05 05:46:08,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:08,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:08,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:08,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:08,754 INFO L87 Difference]: Start difference. First operand 922 states and 1864 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:09,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:09,722 INFO L93 Difference]: Finished difference Result 1156 states and 2301 transitions. [2021-06-05 05:46:09,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:46:09,722 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:46:09,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:09,723 INFO L225 Difference]: With dead ends: 1156 [2021-06-05 05:46:09,723 INFO L226 Difference]: Without dead ends: 1060 [2021-06-05 05:46:09,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 942.7ms TimeCoverageRelationStatistics Valid=287, Invalid=3019, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:46:09,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-06-05 05:46:09,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 966. [2021-06-05 05:46:09,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 2.0300518134715024) internal successors, (1959), 965 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:09,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1959 transitions. [2021-06-05 05:46:09,731 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1959 transitions. Word has length 33 [2021-06-05 05:46:09,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:09,731 INFO L482 AbstractCegarLoop]: Abstraction has 966 states and 1959 transitions. [2021-06-05 05:46:09,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:09,731 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1959 transitions. [2021-06-05 05:46:09,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:09,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:09,732 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:09,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:09,932 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:09,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:09,933 INFO L82 PathProgramCache]: Analyzing trace with hash 550939445, now seen corresponding path program 99 times [2021-06-05 05:46:09,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:09,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319349162] [2021-06-05 05:46:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:10,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:10,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319349162] [2021-06-05 05:46:10,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319349162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:10,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107566052] [2021-06-05 05:46:10,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:10,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:46:10,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:10,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:46:10,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:10,379 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:46:10,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:46:10,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:10,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:10,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:10,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:46:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:10,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107566052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:10,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:10,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:10,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238651054] [2021-06-05 05:46:10,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:10,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:10,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:10,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:10,473 INFO L87 Difference]: Start difference. First operand 966 states and 1959 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:12,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:12,030 INFO L93 Difference]: Finished difference Result 1272 states and 2548 transitions. [2021-06-05 05:46:12,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:46:12,030 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:46:12,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:12,031 INFO L225 Difference]: With dead ends: 1272 [2021-06-05 05:46:12,031 INFO L226 Difference]: Without dead ends: 1170 [2021-06-05 05:46:12,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 1333.7ms TimeCoverageRelationStatistics Valid=447, Invalid=4523, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:46:12,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-06-05 05:46:12,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1008. [2021-06-05 05:46:12,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1007 states have (on average 2.034756703078451) internal successors, (2049), 1007 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:12,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 2049 transitions. [2021-06-05 05:46:12,039 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 2049 transitions. Word has length 33 [2021-06-05 05:46:12,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:12,039 INFO L482 AbstractCegarLoop]: Abstraction has 1008 states and 2049 transitions. [2021-06-05 05:46:12,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:12,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 2049 transitions. [2021-06-05 05:46:12,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:12,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:12,040 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:12,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:12,240 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:12,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:12,241 INFO L82 PathProgramCache]: Analyzing trace with hash -90171145, now seen corresponding path program 100 times [2021-06-05 05:46:12,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:12,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578845566] [2021-06-05 05:46:12,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:12,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:12,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578845566] [2021-06-05 05:46:12,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578845566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:12,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054885538] [2021-06-05 05:46:12,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:12,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:46:12,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:12,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:46:12,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:12,649 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:46:12,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:46:12,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:12,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:12,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:12,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:46:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:12,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054885538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:12,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:12,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:12,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549046340] [2021-06-05 05:46:12,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:12,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:12,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:12,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:12,763 INFO L87 Difference]: Start difference. First operand 1008 states and 2049 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:14,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:14,828 INFO L93 Difference]: Finished difference Result 1420 states and 2865 transitions. [2021-06-05 05:46:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 05:46:14,828 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:46:14,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:14,829 INFO L225 Difference]: With dead ends: 1420 [2021-06-05 05:46:14,829 INFO L226 Difference]: Without dead ends: 1321 [2021-06-05 05:46:14,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2515 ImplicationChecksByTransitivity, 1767.3ms TimeCoverageRelationStatistics Valid=758, Invalid=7074, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 05:46:14,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2021-06-05 05:46:14,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1033. [2021-06-05 05:46:14,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.0339147286821704) internal successors, (2099), 1032 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:14,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2099 transitions. [2021-06-05 05:46:14,837 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2099 transitions. Word has length 33 [2021-06-05 05:46:14,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:14,838 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2099 transitions. [2021-06-05 05:46:14,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:14,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2099 transitions. [2021-06-05 05:46:14,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:14,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:14,838 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:15,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 05:46:15,039 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:15,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:15,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1336071221, now seen corresponding path program 101 times [2021-06-05 05:46:15,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:15,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984106210] [2021-06-05 05:46:15,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:15,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:15,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984106210] [2021-06-05 05:46:15,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984106210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:15,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386250960] [2021-06-05 05:46:15,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:15,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:46:15,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:15,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:46:15,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:15,448 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:46:15,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:46:15,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:15,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:15,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:15,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:46:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:15,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386250960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:15,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:15,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:15,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248586608] [2021-06-05 05:46:15,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:15,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:15,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:15,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:15,566 INFO L87 Difference]: Start difference. First operand 1033 states and 2099 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:17,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:17,927 INFO L93 Difference]: Finished difference Result 1535 states and 3095 transitions. [2021-06-05 05:46:17,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 05:46:17,927 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:46:17,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:17,928 INFO L225 Difference]: With dead ends: 1535 [2021-06-05 05:46:17,928 INFO L226 Difference]: Without dead ends: 1473 [2021-06-05 05:46:17,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 1871.9ms TimeCoverageRelationStatistics Valid=799, Invalid=7757, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 05:46:17,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2021-06-05 05:46:17,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1125. [2021-06-05 05:46:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 2.038256227758007) internal successors, (2291), 1124 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:17,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 2291 transitions. [2021-06-05 05:46:17,938 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 2291 transitions. Word has length 33 [2021-06-05 05:46:17,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:17,938 INFO L482 AbstractCegarLoop]: Abstraction has 1125 states and 2291 transitions. [2021-06-05 05:46:17,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:17,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 2291 transitions. [2021-06-05 05:46:17,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:17,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:17,939 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:18,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:18,154 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:18,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:18,155 INFO L82 PathProgramCache]: Analyzing trace with hash 421438475, now seen corresponding path program 102 times [2021-06-05 05:46:18,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:18,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620134890] [2021-06-05 05:46:18,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:18,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:18,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620134890] [2021-06-05 05:46:18,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620134890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:18,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713057930] [2021-06-05 05:46:18,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:18,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:46:18,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:18,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:46:18,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:18,557 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:46:18,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:46:18,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:18,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:18,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:18,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 05:46:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:18,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713057930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:18,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:18,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:18,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011249426] [2021-06-05 05:46:18,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:18,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:18,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:18,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:18,700 INFO L87 Difference]: Start difference. First operand 1125 states and 2291 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:19,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:19,989 INFO L93 Difference]: Finished difference Result 1427 states and 2865 transitions. [2021-06-05 05:46:19,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:46:19,989 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:46:19,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:19,990 INFO L225 Difference]: With dead ends: 1427 [2021-06-05 05:46:19,990 INFO L226 Difference]: Without dead ends: 1371 [2021-06-05 05:46:19,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1203.4ms TimeCoverageRelationStatistics Valid=411, Invalid=3879, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:46:19,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-06-05 05:46:19,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1213. [2021-06-05 05:46:19,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 2.0354785478547854) internal successors, (2467), 1212 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:19,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 2467 transitions. [2021-06-05 05:46:19,999 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 2467 transitions. Word has length 33 [2021-06-05 05:46:19,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:19,999 INFO L482 AbstractCegarLoop]: Abstraction has 1213 states and 2467 transitions. [2021-06-05 05:46:19,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:19,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 2467 transitions. [2021-06-05 05:46:20,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:20,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:20,000 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:20,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:20,208 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:20,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:20,209 INFO L82 PathProgramCache]: Analyzing trace with hash 424854753, now seen corresponding path program 103 times [2021-06-05 05:46:20,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:20,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355713320] [2021-06-05 05:46:20,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:20,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:20,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355713320] [2021-06-05 05:46:20,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355713320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:20,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905465001] [2021-06-05 05:46:20,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:20,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:46:20,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:20,656 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:46:20,656 INFO L388 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 13 [2021-06-05 05:46:20,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:20,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:20,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:20,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:46:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:20,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905465001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:20,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:20,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:20,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535281795] [2021-06-05 05:46:20,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:20,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:20,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:20,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:20,751 INFO L87 Difference]: Start difference. First operand 1213 states and 2467 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:22,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:22,513 INFO L93 Difference]: Finished difference Result 1723 states and 3477 transitions. [2021-06-05 05:46:22,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 05:46:22,513 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:46:22,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:22,514 INFO L225 Difference]: With dead ends: 1723 [2021-06-05 05:46:22,514 INFO L226 Difference]: Without dead ends: 1635 [2021-06-05 05:46:22,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1823 ImplicationChecksByTransitivity, 1559.4ms TimeCoverageRelationStatistics Valid=518, Invalid=5488, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 05:46:22,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-05 05:46:22,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1449. [2021-06-05 05:46:22,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 2.033839779005525) internal successors, (2945), 1448 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:22,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2945 transitions. [2021-06-05 05:46:22,526 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2945 transitions. Word has length 33 [2021-06-05 05:46:22,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:22,526 INFO L482 AbstractCegarLoop]: Abstraction has 1449 states and 2945 transitions. [2021-06-05 05:46:22,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:22,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2945 transitions. [2021-06-05 05:46:22,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:22,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:22,527 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:22,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 05:46:22,727 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:22,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:22,728 INFO L82 PathProgramCache]: Analyzing trace with hash -216255837, now seen corresponding path program 104 times [2021-06-05 05:46:22,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:22,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821032425] [2021-06-05 05:46:22,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:22,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:22,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821032425] [2021-06-05 05:46:22,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821032425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:22,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139642535] [2021-06-05 05:46:22,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:22,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:46:22,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:22,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:46:22,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:23,159 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:46:23,159 INFO L388 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 13 [2021-06-05 05:46:23,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:23,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:23,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:23,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:46:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:23,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139642535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:23,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:23,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:23,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651411874] [2021-06-05 05:46:23,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:23,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:23,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:23,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:23,279 INFO L87 Difference]: Start difference. First operand 1449 states and 2945 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:25,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:25,168 INFO L93 Difference]: Finished difference Result 1938 states and 3950 transitions. [2021-06-05 05:46:25,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 05:46:25,168 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:46:25,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:25,170 INFO L225 Difference]: With dead ends: 1938 [2021-06-05 05:46:25,170 INFO L226 Difference]: Without dead ends: 1858 [2021-06-05 05:46:25,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 1722.5ms TimeCoverageRelationStatistics Valid=642, Invalid=6668, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 05:46:25,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-06-05 05:46:25,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1298. [2021-06-05 05:46:25,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 2.0323824209714725) internal successors, (2636), 1297 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:25,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 2636 transitions. [2021-06-05 05:46:25,183 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 2636 transitions. Word has length 33 [2021-06-05 05:46:25,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:25,183 INFO L482 AbstractCegarLoop]: Abstraction has 1298 states and 2636 transitions. [2021-06-05 05:46:25,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:25,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 2636 transitions. [2021-06-05 05:46:25,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:25,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:25,184 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:25,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 05:46:25,384 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:25,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:25,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1209986529, now seen corresponding path program 105 times [2021-06-05 05:46:25,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:25,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483959161] [2021-06-05 05:46:25,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:25,612 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:25,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:25,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483959161] [2021-06-05 05:46:25,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483959161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:25,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857962729] [2021-06-05 05:46:25,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:25,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:46:25,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:25,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:46:25,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:25,831 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:46:25,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:46:25,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:25,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:25,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:25,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:46:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:25,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857962729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:25,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:25,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:25,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114559808] [2021-06-05 05:46:25,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:25,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:25,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:25,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:25,944 INFO L87 Difference]: Start difference. First operand 1298 states and 2636 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:28,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:28,301 INFO L93 Difference]: Finished difference Result 1677 states and 3376 transitions. [2021-06-05 05:46:28,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 05:46:28,301 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:46:28,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:28,302 INFO L225 Difference]: With dead ends: 1677 [2021-06-05 05:46:28,303 INFO L226 Difference]: Without dead ends: 1621 [2021-06-05 05:46:28,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2651 ImplicationChecksByTransitivity, 1880.1ms TimeCoverageRelationStatistics Valid=733, Invalid=7457, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 05:46:28,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-06-05 05:46:28,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1260. [2021-06-05 05:46:28,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1259 states have (on average 2.0309769658459094) internal successors, (2557), 1259 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:28,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 2557 transitions. [2021-06-05 05:46:28,314 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 2557 transitions. Word has length 33 [2021-06-05 05:46:28,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:28,315 INFO L482 AbstractCegarLoop]: Abstraction has 1260 states and 2557 transitions. [2021-06-05 05:46:28,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:28,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 2557 transitions. [2021-06-05 05:46:28,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:28,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:28,316 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:28,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 05:46:28,516 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:28,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:28,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1105139911, now seen corresponding path program 106 times [2021-06-05 05:46:28,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:28,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182860007] [2021-06-05 05:46:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:28,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:28,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182860007] [2021-06-05 05:46:28,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182860007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:28,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476222934] [2021-06-05 05:46:28,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:28,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:46:28,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:28,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:46:28,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:29,019 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:46:29,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:46:29,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:29,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:29,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:29,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 05:46:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:29,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476222934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:29,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:29,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:29,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920972543] [2021-06-05 05:46:29,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:29,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:29,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:29,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:29,162 INFO L87 Difference]: Start difference. First operand 1260 states and 2557 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:30,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:30,525 INFO L93 Difference]: Finished difference Result 1761 states and 3540 transitions. [2021-06-05 05:46:30,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:46:30,526 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:46:30,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:30,527 INFO L225 Difference]: With dead ends: 1761 [2021-06-05 05:46:30,527 INFO L226 Difference]: Without dead ends: 1705 [2021-06-05 05:46:30,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 1362.5ms TimeCoverageRelationStatistics Valid=453, Invalid=4103, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:46:30,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-06-05 05:46:30,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1472. [2021-06-05 05:46:30,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.0271923861318832) internal successors, (2982), 1471 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:30,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2982 transitions. [2021-06-05 05:46:30,539 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2982 transitions. Word has length 33 [2021-06-05 05:46:30,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:30,539 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 2982 transitions. [2021-06-05 05:46:30,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:30,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2982 transitions. [2021-06-05 05:46:30,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:30,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:30,540 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:30,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:30,741 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:30,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:30,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1831498867, now seen corresponding path program 107 times [2021-06-05 05:46:30,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:30,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410214601] [2021-06-05 05:46:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:30,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:30,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410214601] [2021-06-05 05:46:30,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410214601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:30,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888891458] [2021-06-05 05:46:30,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:30,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:46:30,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:30,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:46:30,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:31,196 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:46:31,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:46:31,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:31,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:31,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:31,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:46:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:31,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888891458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:31,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:31,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:31,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541392217] [2021-06-05 05:46:31,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:31,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:31,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:31,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:31,294 INFO L87 Difference]: Start difference. First operand 1472 states and 2982 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:32,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:32,223 INFO L93 Difference]: Finished difference Result 1677 states and 3355 transitions. [2021-06-05 05:46:32,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:46:32,224 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:46:32,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:32,225 INFO L225 Difference]: With dead ends: 1677 [2021-06-05 05:46:32,225 INFO L226 Difference]: Without dead ends: 1581 [2021-06-05 05:46:32,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 914.5ms TimeCoverageRelationStatistics Valid=290, Invalid=2902, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:46:32,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2021-06-05 05:46:32,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1497. [2021-06-05 05:46:32,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 2.0267379679144386) internal successors, (3032), 1496 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 3032 transitions. [2021-06-05 05:46:32,237 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 3032 transitions. Word has length 33 [2021-06-05 05:46:32,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:32,237 INFO L482 AbstractCegarLoop]: Abstraction has 1497 states and 3032 transitions. [2021-06-05 05:46:32,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:32,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 3032 transitions. [2021-06-05 05:46:32,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:32,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:32,238 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:32,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 05:46:32,439 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:32,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:32,439 INFO L82 PathProgramCache]: Analyzing trace with hash -445876277, now seen corresponding path program 108 times [2021-06-05 05:46:32,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:32,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540234784] [2021-06-05 05:46:32,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:32,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:32,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540234784] [2021-06-05 05:46:32,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540234784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:32,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135024801] [2021-06-05 05:46:32,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:32,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:46:32,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:32,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:46:32,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:32,893 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:46:32,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:46:32,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:32,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:32,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:32,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:46:32,983 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:32,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135024801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:32,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:32,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:32,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898906065] [2021-06-05 05:46:32,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:32,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:32,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:32,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:32,984 INFO L87 Difference]: Start difference. First operand 1497 states and 3032 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:33,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:33,992 INFO L93 Difference]: Finished difference Result 1692 states and 3391 transitions. [2021-06-05 05:46:33,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:46:33,992 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:46:33,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:33,994 INFO L225 Difference]: With dead ends: 1692 [2021-06-05 05:46:33,994 INFO L226 Difference]: Without dead ends: 1604 [2021-06-05 05:46:33,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 936.2ms TimeCoverageRelationStatistics Valid=294, Invalid=2898, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:46:33,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-06-05 05:46:34,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1500. [2021-06-05 05:46:34,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 2.026684456304203) internal successors, (3038), 1499 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:34,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 3038 transitions. [2021-06-05 05:46:34,006 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 3038 transitions. Word has length 33 [2021-06-05 05:46:34,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:34,006 INFO L482 AbstractCegarLoop]: Abstraction has 1500 states and 3038 transitions. [2021-06-05 05:46:34,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:34,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 3038 transitions. [2021-06-05 05:46:34,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:34,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:34,007 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:34,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 05:46:34,208 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:34,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:34,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1086986867, now seen corresponding path program 109 times [2021-06-05 05:46:34,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:34,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500419096] [2021-06-05 05:46:34,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:34,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:34,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500419096] [2021-06-05 05:46:34,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500419096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:34,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620826727] [2021-06-05 05:46:34,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:34,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:46:34,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:34,632 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:46:34,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:46:34,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:34,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:34,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:34,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:46:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:34,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620826727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:34,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:34,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:34,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019698152] [2021-06-05 05:46:34,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:34,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:34,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:34,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:34,750 INFO L87 Difference]: Start difference. First operand 1500 states and 3038 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:36,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:36,215 INFO L93 Difference]: Finished difference Result 1779 states and 3570 transitions. [2021-06-05 05:46:36,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:46:36,215 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:46:36,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:36,216 INFO L225 Difference]: With dead ends: 1779 [2021-06-05 05:46:36,216 INFO L226 Difference]: Without dead ends: 1683 [2021-06-05 05:46:36,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 1282.5ms TimeCoverageRelationStatistics Valid=501, Invalid=4611, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:46:36,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-06-05 05:46:36,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1505. [2021-06-05 05:46:36,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 2.02593085106383) internal successors, (3047), 1504 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:36,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 3047 transitions. [2021-06-05 05:46:36,227 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 3047 transitions. Word has length 33 [2021-06-05 05:46:36,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:36,227 INFO L482 AbstractCegarLoop]: Abstraction has 1505 states and 3047 transitions. [2021-06-05 05:46:36,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:36,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 3047 transitions. [2021-06-05 05:46:36,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:36,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:36,229 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:36,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 05:46:36,429 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:36,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:36,429 INFO L82 PathProgramCache]: Analyzing trace with hash 339255499, now seen corresponding path program 110 times [2021-06-05 05:46:36,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:36,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005366002] [2021-06-05 05:46:36,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:36,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:36,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005366002] [2021-06-05 05:46:36,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005366002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:36,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504051963] [2021-06-05 05:46:36,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:36,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:46:36,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:36,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:46:36,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:36,839 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:46:36,840 INFO L388 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 13 [2021-06-05 05:46:36,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:36,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:36,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:36,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:46:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:36,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504051963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:36,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:36,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:36,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982185841] [2021-06-05 05:46:36,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:36,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:36,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:36,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:36,954 INFO L87 Difference]: Start difference. First operand 1505 states and 3047 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:38,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:38,916 INFO L93 Difference]: Finished difference Result 1945 states and 3897 transitions. [2021-06-05 05:46:38,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 05:46:38,916 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:46:38,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:38,917 INFO L225 Difference]: With dead ends: 1945 [2021-06-05 05:46:38,917 INFO L226 Difference]: Without dead ends: 1867 [2021-06-05 05:46:38,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 1649.0ms TimeCoverageRelationStatistics Valid=689, Invalid=6451, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 05:46:38,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2021-06-05 05:46:38,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1496. [2021-06-05 05:46:38,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.0247491638795987) internal successors, (3027), 1495 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:38,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3027 transitions. [2021-06-05 05:46:38,931 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3027 transitions. Word has length 33 [2021-06-05 05:46:38,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:38,931 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 3027 transitions. [2021-06-05 05:46:38,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:38,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3027 transitions. [2021-06-05 05:46:38,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:38,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:38,932 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:39,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:39,133 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:39,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:39,133 INFO L82 PathProgramCache]: Analyzing trace with hash -575377247, now seen corresponding path program 111 times [2021-06-05 05:46:39,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:39,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398038529] [2021-06-05 05:46:39,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:39,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:39,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398038529] [2021-06-05 05:46:39,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398038529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:39,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079420434] [2021-06-05 05:46:39,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:39,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:46:39,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:39,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:46:39,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:39,543 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:46:39,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:46:39,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:39,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:39,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:39,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 05:46:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:39,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079420434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:39,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:39,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:39,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941584135] [2021-06-05 05:46:39,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:39,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:39,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:39,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:39,728 INFO L87 Difference]: Start difference. First operand 1496 states and 3027 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:41,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:41,229 INFO L93 Difference]: Finished difference Result 1709 states and 3422 transitions. [2021-06-05 05:46:41,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:46:41,229 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:46:41,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:41,231 INFO L225 Difference]: With dead ends: 1709 [2021-06-05 05:46:41,231 INFO L226 Difference]: Without dead ends: 1647 [2021-06-05 05:46:41,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 1348.4ms TimeCoverageRelationStatistics Valid=509, Invalid=4747, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:46:41,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-06-05 05:46:41,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1473. [2021-06-05 05:46:41,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 2.027173913043478) internal successors, (2984), 1472 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:41,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2984 transitions. [2021-06-05 05:46:41,249 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2984 transitions. Word has length 33 [2021-06-05 05:46:41,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:41,249 INFO L482 AbstractCegarLoop]: Abstraction has 1473 states and 2984 transitions. [2021-06-05 05:46:41,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:41,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2984 transitions. [2021-06-05 05:46:41,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:41,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:41,251 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:41,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:41,451 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:41,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:41,451 INFO L82 PathProgramCache]: Analyzing trace with hash -79198585, now seen corresponding path program 112 times [2021-06-05 05:46:41,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:41,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147891261] [2021-06-05 05:46:41,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:41,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:41,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147891261] [2021-06-05 05:46:41,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147891261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:41,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749990919] [2021-06-05 05:46:41,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:41,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:46:41,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:41,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:46:41,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:41,882 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:46:41,882 INFO L388 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 13 [2021-06-05 05:46:41,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:41,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:41,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:41,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:46:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:41,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749990919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:41,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:41,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-06-05 05:46:41,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764189969] [2021-06-05 05:46:41,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:46:41,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:41,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:46:41,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:46:41,975 INFO L87 Difference]: Start difference. First operand 1473 states and 2984 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:43,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:43,134 INFO L93 Difference]: Finished difference Result 1663 states and 3329 transitions. [2021-06-05 05:46:43,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:46:43,134 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:46:43,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:43,135 INFO L225 Difference]: With dead ends: 1663 [2021-06-05 05:46:43,135 INFO L226 Difference]: Without dead ends: 1575 [2021-06-05 05:46:43,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 1086.5ms TimeCoverageRelationStatistics Valid=336, Invalid=3204, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:46:43,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-06-05 05:46:43,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1495. [2021-06-05 05:46:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0254350736278446) internal successors, (3026), 1494 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3026 transitions. [2021-06-05 05:46:43,147 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3026 transitions. Word has length 33 [2021-06-05 05:46:43,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:43,147 INFO L482 AbstractCegarLoop]: Abstraction has 1495 states and 3026 transitions. [2021-06-05 05:46:43,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:43,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3026 transitions. [2021-06-05 05:46:43,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:43,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:43,148 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:43,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:43,348 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:43,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:43,348 INFO L82 PathProgramCache]: Analyzing trace with hash -720309175, now seen corresponding path program 113 times [2021-06-05 05:46:43,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:43,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285292768] [2021-06-05 05:46:43,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:43,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:43,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285292768] [2021-06-05 05:46:43,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285292768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:43,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284201151] [2021-06-05 05:46:43,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:43,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:46:43,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:43,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:46:43,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:43,782 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:46:43,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:46:43,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:43,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:43,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:43,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:46:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:43,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284201151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:43,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:43,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-06-05 05:46:43,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11887270] [2021-06-05 05:46:43,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:46:43,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:43,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:46:43,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:46:43,890 INFO L87 Difference]: Start difference. First operand 1495 states and 3026 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:45,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:45,034 INFO L93 Difference]: Finished difference Result 1683 states and 3373 transitions. [2021-06-05 05:46:45,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:46:45,035 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:46:45,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:45,036 INFO L225 Difference]: With dead ends: 1683 [2021-06-05 05:46:45,036 INFO L226 Difference]: Without dead ends: 1611 [2021-06-05 05:46:45,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1165.2ms TimeCoverageRelationStatistics Valid=430, Invalid=3860, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:46:45,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-06-05 05:46:45,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1496. [2021-06-05 05:46:45,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.025418060200669) internal successors, (3028), 1495 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3028 transitions. [2021-06-05 05:46:45,047 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3028 transitions. Word has length 33 [2021-06-05 05:46:45,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:45,047 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 3028 transitions. [2021-06-05 05:46:45,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:45,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3028 transitions. [2021-06-05 05:46:45,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:45,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:45,049 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:45,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 05:46:45,249 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:45,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:45,249 INFO L82 PathProgramCache]: Analyzing trace with hash 705933191, now seen corresponding path program 114 times [2021-06-05 05:46:45,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:45,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530703430] [2021-06-05 05:46:45,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:45,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:45,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530703430] [2021-06-05 05:46:45,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530703430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:45,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320245755] [2021-06-05 05:46:45,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:45,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:46:45,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:45,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:46:45,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:45,645 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:46:45,645 INFO L388 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 13 [2021-06-05 05:46:45,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:45,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:45,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:45,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:46:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:45,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320245755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:45,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:45,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-06-05 05:46:45,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060771878] [2021-06-05 05:46:45,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:46:45,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:45,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:46:45,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:46:45,752 INFO L87 Difference]: Start difference. First operand 1496 states and 3028 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:47,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:47,235 INFO L93 Difference]: Finished difference Result 1719 states and 3451 transitions. [2021-06-05 05:46:47,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:46:47,235 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:46:47,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:47,237 INFO L225 Difference]: With dead ends: 1719 [2021-06-05 05:46:47,237 INFO L226 Difference]: Without dead ends: 1657 [2021-06-05 05:46:47,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 1386.0ms TimeCoverageRelationStatistics Valid=546, Invalid=4710, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:46:47,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-06-05 05:46:47,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1472. [2021-06-05 05:46:47,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.0271923861318832) internal successors, (2982), 1471 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:47,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2982 transitions. [2021-06-05 05:46:47,249 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2982 transitions. Word has length 33 [2021-06-05 05:46:47,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:47,249 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 2982 transitions. [2021-06-05 05:46:47,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:47,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2982 transitions. [2021-06-05 05:46:47,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:47,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:47,250 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:47,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 05:46:47,465 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:47,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:47,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1771583481, now seen corresponding path program 115 times [2021-06-05 05:46:47,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:47,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576939485] [2021-06-05 05:46:47,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:47,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:47,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576939485] [2021-06-05 05:46:47,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576939485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:47,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758312127] [2021-06-05 05:46:47,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:47,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:46:47,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:47,896 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:46:47,896 INFO L388 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 36 treesize of output 16 [2021-06-05 05:46:47,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:47,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:47,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:47,902 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-06-05 05:46:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:48,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758312127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:48,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:48,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:48,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787268082] [2021-06-05 05:46:48,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:48,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:48,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:48,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:48,004 INFO L87 Difference]: Start difference. First operand 1472 states and 2982 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:46:48,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:48,861 INFO L93 Difference]: Finished difference Result 1608 states and 3221 transitions. [2021-06-05 05:46:48,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:46:48,861 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:46:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:48,863 INFO L225 Difference]: With dead ends: 1608 [2021-06-05 05:46:48,863 INFO L226 Difference]: Without dead ends: 1560 [2021-06-05 05:46:48,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 774.0ms TimeCoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:46:48,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-06-05 05:46:48,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1483. [2021-06-05 05:46:48,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 2.0276653171390016) internal successors, (3005), 1482 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:48,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 3005 transitions. [2021-06-05 05:46:48,874 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 3005 transitions. Word has length 33 [2021-06-05 05:46:48,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:48,874 INFO L482 AbstractCegarLoop]: Abstraction has 1483 states and 3005 transitions. [2021-06-05 05:46:48,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:46:48,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 3005 transitions. [2021-06-05 05:46:48,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:48,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:48,875 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:49,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 05:46:49,076 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:49,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:49,076 INFO L82 PathProgramCache]: Analyzing trace with hash -492211767, now seen corresponding path program 116 times [2021-06-05 05:46:49,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:49,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307057079] [2021-06-05 05:46:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:49,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:49,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:49,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307057079] [2021-06-05 05:46:49,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307057079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:49,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456903746] [2021-06-05 05:46:49,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:49,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:46:49,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:49,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:46:49,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:49,513 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:46:49,513 INFO L388 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 36 treesize of output 16 [2021-06-05 05:46:49,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:49,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:49,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:49,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-06-05 05:46:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:49,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456903746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:49,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:49,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:49,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751167663] [2021-06-05 05:46:49,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:49,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:49,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:49,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:49,622 INFO L87 Difference]: Start difference. First operand 1483 states and 3005 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:46:50,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:50,475 INFO L93 Difference]: Finished difference Result 1645 states and 3288 transitions. [2021-06-05 05:46:50,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:46:50,475 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:46:50,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:50,476 INFO L225 Difference]: With dead ends: 1645 [2021-06-05 05:46:50,476 INFO L226 Difference]: Without dead ends: 1597 [2021-06-05 05:46:50,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 781.5ms TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:46:50,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-06-05 05:46:50,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1484. [2021-06-05 05:46:50,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.0276466621712745) internal successors, (3007), 1483 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:50,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 3007 transitions. [2021-06-05 05:46:50,488 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 3007 transitions. Word has length 33 [2021-06-05 05:46:50,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:50,489 INFO L482 AbstractCegarLoop]: Abstraction has 1484 states and 3007 transitions. [2021-06-05 05:46:50,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:46:50,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 3007 transitions. [2021-06-05 05:46:50,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:50,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:50,490 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:50,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:50,700 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:50,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:50,701 INFO L82 PathProgramCache]: Analyzing trace with hash 893410823, now seen corresponding path program 117 times [2021-06-05 05:46:50,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:50,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271386038] [2021-06-05 05:46:50,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:50,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:50,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271386038] [2021-06-05 05:46:50,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271386038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:50,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134932363] [2021-06-05 05:46:50,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:50,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:46:50,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:50,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:46:50,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:51,141 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:46:51,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 05:46:51,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:51,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:51,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:51,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-06-05 05:46:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:51,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134932363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:51,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:51,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:51,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753317828] [2021-06-05 05:46:51,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:51,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:51,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:51,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:51,250 INFO L87 Difference]: Start difference. First operand 1484 states and 3007 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:46:52,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:52,251 INFO L93 Difference]: Finished difference Result 1683 states and 3366 transitions. [2021-06-05 05:46:52,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:46:52,252 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:46:52,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:52,253 INFO L225 Difference]: With dead ends: 1683 [2021-06-05 05:46:52,253 INFO L226 Difference]: Without dead ends: 1635 [2021-06-05 05:46:52,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 859.7ms TimeCoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:46:52,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-05 05:46:52,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1488. [2021-06-05 05:46:52,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 2.027572293207801) internal successors, (3015), 1487 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:52,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 3015 transitions. [2021-06-05 05:46:52,265 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 3015 transitions. Word has length 33 [2021-06-05 05:46:52,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:52,265 INFO L482 AbstractCegarLoop]: Abstraction has 1488 states and 3015 transitions. [2021-06-05 05:46:52,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:46:52,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 3015 transitions. [2021-06-05 05:46:52,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:52,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:52,266 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:52,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 05:46:52,467 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:52,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:52,467 INFO L82 PathProgramCache]: Analyzing trace with hash 252300233, now seen corresponding path program 118 times [2021-06-05 05:46:52,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:52,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486943535] [2021-06-05 05:46:52,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:52,670 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:52,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:52,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486943535] [2021-06-05 05:46:52,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486943535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:52,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813841695] [2021-06-05 05:46:52,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:52,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:46:52,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:52,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:46:52,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:52,885 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:46:52,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 05:46:52,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:52,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:52,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:52,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-06-05 05:46:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:53,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813841695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:53,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:53,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:53,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587204879] [2021-06-05 05:46:53,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:53,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:53,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:53,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:53,018 INFO L87 Difference]: Start difference. First operand 1488 states and 3015 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:46:54,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:54,137 INFO L93 Difference]: Finished difference Result 1716 states and 3435 transitions. [2021-06-05 05:46:54,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:46:54,137 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:46:54,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:54,138 INFO L225 Difference]: With dead ends: 1716 [2021-06-05 05:46:54,139 INFO L226 Difference]: Without dead ends: 1684 [2021-06-05 05:46:54,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 965.7ms TimeCoverageRelationStatistics Valid=252, Invalid=2504, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:46:54,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-06-05 05:46:54,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1489. [2021-06-05 05:46:54,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 2.02755376344086) internal successors, (3017), 1488 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:54,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 3017 transitions. [2021-06-05 05:46:54,150 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 3017 transitions. Word has length 33 [2021-06-05 05:46:54,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:54,150 INFO L482 AbstractCegarLoop]: Abstraction has 1489 states and 3017 transitions. [2021-06-05 05:46:54,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:46:54,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 3017 transitions. [2021-06-05 05:46:54,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:54,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:54,152 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:54,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:54,352 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:54,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:54,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1678542599, now seen corresponding path program 119 times [2021-06-05 05:46:54,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:54,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134788369] [2021-06-05 05:46:54,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:54,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:54,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134788369] [2021-06-05 05:46:54,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134788369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:54,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835728741] [2021-06-05 05:46:54,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:54,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:46:54,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:54,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:46:54,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:54,761 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:46:54,762 INFO L388 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 36 treesize of output 16 [2021-06-05 05:46:54,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:54,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:54,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:54,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-06-05 05:46:54,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:54,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835728741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:54,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:54,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:54,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411668345] [2021-06-05 05:46:54,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:54,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:54,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:54,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:54,892 INFO L87 Difference]: Start difference. First operand 1489 states and 3017 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:46:56,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:56,251 INFO L93 Difference]: Finished difference Result 1787 states and 3573 transitions. [2021-06-05 05:46:56,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:46:56,251 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:46:56,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:56,253 INFO L225 Difference]: With dead ends: 1787 [2021-06-05 05:46:56,253 INFO L226 Difference]: Without dead ends: 1743 [2021-06-05 05:46:56,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1078.5ms TimeCoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:46:56,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2021-06-05 05:46:56,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1485. [2021-06-05 05:46:56,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 2.0256064690026956) internal successors, (3006), 1484 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 3006 transitions. [2021-06-05 05:46:56,265 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 3006 transitions. Word has length 33 [2021-06-05 05:46:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:56,265 INFO L482 AbstractCegarLoop]: Abstraction has 1485 states and 3006 transitions. [2021-06-05 05:46:56,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:46:56,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 3006 transitions. [2021-06-05 05:46:56,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:56,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:56,266 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:56,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:56,482 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:56,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:56,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1040826887, now seen corresponding path program 120 times [2021-06-05 05:46:56,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:56,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775141677] [2021-06-05 05:46:56,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:56,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:56,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775141677] [2021-06-05 05:46:56,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775141677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:56,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309355143] [2021-06-05 05:46:56,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:56,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:46:56,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:56,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:46:56,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:56,878 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:46:56,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 05:46:56,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:56,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:56,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:56,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-06-05 05:46:57,030 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:57,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309355143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:57,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:57,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:57,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647946882] [2021-06-05 05:46:57,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:57,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:57,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:57,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:57,031 INFO L87 Difference]: Start difference. First operand 1485 states and 3006 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:46:57,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:57,924 INFO L93 Difference]: Finished difference Result 1606 states and 3236 transitions. [2021-06-05 05:46:57,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:46:57,924 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:46:57,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:57,926 INFO L225 Difference]: With dead ends: 1606 [2021-06-05 05:46:57,926 INFO L226 Difference]: Without dead ends: 1578 [2021-06-05 05:46:57,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 808.1ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:46:57,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-06-05 05:46:57,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1477. [2021-06-05 05:46:57,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 2.0257452574525745) internal successors, (2990), 1476 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:57,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 2990 transitions. [2021-06-05 05:46:57,937 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 2990 transitions. Word has length 33 [2021-06-05 05:46:57,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:57,938 INFO L482 AbstractCegarLoop]: Abstraction has 1477 states and 2990 transitions. [2021-06-05 05:46:57,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:46:57,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 2990 transitions. [2021-06-05 05:46:57,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:57,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:57,939 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:58,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 05:46:58,139 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:58,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:58,139 INFO L82 PathProgramCache]: Analyzing trace with hash -777516603, now seen corresponding path program 121 times [2021-06-05 05:46:58,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:58,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274390018] [2021-06-05 05:46:58,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:58,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:58,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274390018] [2021-06-05 05:46:58,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274390018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:58,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979180857] [2021-06-05 05:46:58,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:58,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:46:58,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:58,594 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:46:58,595 INFO L388 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 36 treesize of output 16 [2021-06-05 05:46:58,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:46:58,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:46:58,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:46:58,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-06-05 05:46:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:58,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979180857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:58,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:58,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:46:58,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290620559] [2021-06-05 05:46:58,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:46:58,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:58,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:46:58,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:46:58,699 INFO L87 Difference]: Start difference. First operand 1477 states and 2990 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:46:59,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:59,744 INFO L93 Difference]: Finished difference Result 1650 states and 3303 transitions. [2021-06-05 05:46:59,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:46:59,744 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:46:59,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:59,745 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 05:46:59,745 INFO L226 Difference]: Without dead ends: 1554 [2021-06-05 05:46:59,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1005.6ms TimeCoverageRelationStatistics Valid=295, Invalid=3127, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:46:59,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-06-05 05:46:59,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1494. [2021-06-05 05:46:59,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.026791694574682) internal successors, (3026), 1493 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:59,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3026 transitions. [2021-06-05 05:46:59,757 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3026 transitions. Word has length 33 [2021-06-05 05:46:59,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:59,757 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 3026 transitions. [2021-06-05 05:46:59,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:46:59,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3026 transitions. [2021-06-05 05:46:59,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:46:59,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:59,758 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:59,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 05:46:59,973 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:59,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:59,974 INFO L82 PathProgramCache]: Analyzing trace with hash 608105987, now seen corresponding path program 122 times [2021-06-05 05:46:59,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:59,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123597674] [2021-06-05 05:46:59,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:00,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:00,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123597674] [2021-06-05 05:47:00,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123597674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:00,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030357320] [2021-06-05 05:47:00,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:00,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:47:00,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:00,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:47:00,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:00,404 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:47:00,404 INFO L388 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 36 treesize of output 16 [2021-06-05 05:47:00,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:00,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:00,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:00,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-06-05 05:47:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:00,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030357320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:00,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:00,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:47:00,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820136752] [2021-06-05 05:47:00,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:47:00,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:00,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:47:00,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:47:00,510 INFO L87 Difference]: Start difference. First operand 1494 states and 3026 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:02,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:02,053 INFO L93 Difference]: Finished difference Result 1712 states and 3436 transitions. [2021-06-05 05:47:02,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:47:02,053 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:47:02,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:02,055 INFO L225 Difference]: With dead ends: 1712 [2021-06-05 05:47:02,055 INFO L226 Difference]: Without dead ends: 1617 [2021-06-05 05:47:02,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 1231.9ms TimeCoverageRelationStatistics Valid=386, Invalid=3904, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:47:02,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-06-05 05:47:02,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1503. [2021-06-05 05:47:02,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 2.026631158455393) internal successors, (3044), 1502 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:02,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 3044 transitions. [2021-06-05 05:47:02,067 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 3044 transitions. Word has length 33 [2021-06-05 05:47:02,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:02,067 INFO L482 AbstractCegarLoop]: Abstraction has 1503 states and 3044 transitions. [2021-06-05 05:47:02,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:02,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 3044 transitions. [2021-06-05 05:47:02,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:47:02,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:02,068 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:02,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:02,273 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:02,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:02,273 INFO L82 PathProgramCache]: Analyzing trace with hash -33004603, now seen corresponding path program 123 times [2021-06-05 05:47:02,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:02,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225451389] [2021-06-05 05:47:02,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:02,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:02,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225451389] [2021-06-05 05:47:02,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225451389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:02,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367106960] [2021-06-05 05:47:02,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:02,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:47:02,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:02,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:47:02,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:02,681 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:47:02,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 05:47:02,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:02,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:02,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:02,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-06-05 05:47:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:02,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367106960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:02,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:02,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:47:02,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524369932] [2021-06-05 05:47:02,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:47:02,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:02,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:47:02,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:47:02,808 INFO L87 Difference]: Start difference. First operand 1503 states and 3044 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:04,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:04,558 INFO L93 Difference]: Finished difference Result 1736 states and 3481 transitions. [2021-06-05 05:47:04,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:47:04,559 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:47:04,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:04,560 INFO L225 Difference]: With dead ends: 1736 [2021-06-05 05:47:04,560 INFO L226 Difference]: Without dead ends: 1656 [2021-06-05 05:47:04,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 1422.9ms TimeCoverageRelationStatistics Valid=540, Invalid=4430, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:47:04,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-06-05 05:47:04,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1499. [2021-06-05 05:47:04,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 2.0246995994659547) internal successors, (3033), 1498 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:04,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 3033 transitions. [2021-06-05 05:47:04,572 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 3033 transitions. Word has length 33 [2021-06-05 05:47:04,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:04,572 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 3033 transitions. [2021-06-05 05:47:04,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:04,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 3033 transitions. [2021-06-05 05:47:04,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:47:04,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:04,573 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:04,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:04,774 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:04,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:04,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1393237763, now seen corresponding path program 124 times [2021-06-05 05:47:04,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:04,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442512655] [2021-06-05 05:47:04,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:04,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:04,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442512655] [2021-06-05 05:47:04,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442512655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:04,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109110451] [2021-06-05 05:47:04,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:05,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:47:05,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:05,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:47:05,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:05,186 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:47:05,186 INFO L388 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 36 treesize of output 16 [2021-06-05 05:47:05,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:05,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:05,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:05,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-06-05 05:47:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:05,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109110451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:05,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:05,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:47:05,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144093961] [2021-06-05 05:47:05,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:47:05,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:05,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:47:05,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:47:05,321 INFO L87 Difference]: Start difference. First operand 1499 states and 3033 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:07,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:07,304 INFO L93 Difference]: Finished difference Result 1806 states and 3621 transitions. [2021-06-05 05:47:07,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:47:07,305 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:47:07,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:07,306 INFO L225 Difference]: With dead ends: 1806 [2021-06-05 05:47:07,306 INFO L226 Difference]: Without dead ends: 1747 [2021-06-05 05:47:07,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 1501.6ms TimeCoverageRelationStatistics Valid=562, Invalid=4840, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:47:07,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-06-05 05:47:07,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1494. [2021-06-05 05:47:07,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.0247823174815807) internal successors, (3023), 1493 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:07,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3023 transitions. [2021-06-05 05:47:07,319 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3023 transitions. Word has length 33 [2021-06-05 05:47:07,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:07,319 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 3023 transitions. [2021-06-05 05:47:07,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:07,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3023 transitions. [2021-06-05 05:47:07,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:47:07,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:07,320 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:07,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:07,536 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:07,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:07,537 INFO L82 PathProgramCache]: Analyzing trace with hash 478605017, now seen corresponding path program 125 times [2021-06-05 05:47:07,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:07,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73410956] [2021-06-05 05:47:07,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:07,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:07,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73410956] [2021-06-05 05:47:07,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73410956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:07,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872810719] [2021-06-05 05:47:07,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:07,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:47:07,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:07,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:47:07,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:07,931 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:47:07,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 05:47:07,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:07,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:07,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:07,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-06-05 05:47:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:08,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872810719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:08,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:08,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:47:08,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646827515] [2021-06-05 05:47:08,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:47:08,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:08,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:47:08,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:47:08,081 INFO L87 Difference]: Start difference. First operand 1494 states and 3023 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:09,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:09,628 INFO L93 Difference]: Finished difference Result 1678 states and 3369 transitions. [2021-06-05 05:47:09,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:47:09,629 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:47:09,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:09,630 INFO L225 Difference]: With dead ends: 1678 [2021-06-05 05:47:09,630 INFO L226 Difference]: Without dead ends: 1619 [2021-06-05 05:47:09,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 1294.5ms TimeCoverageRelationStatistics Valid=416, Invalid=4006, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:47:09,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-06-05 05:47:09,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1494. [2021-06-05 05:47:09,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.0247823174815807) internal successors, (3023), 1493 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:09,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3023 transitions. [2021-06-05 05:47:09,643 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3023 transitions. Word has length 33 [2021-06-05 05:47:09,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:09,643 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 3023 transitions. [2021-06-05 05:47:09,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:09,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3023 transitions. [2021-06-05 05:47:09,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:47:09,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:09,644 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:09,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 05:47:09,853 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:09,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:09,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1104831497, now seen corresponding path program 126 times [2021-06-05 05:47:09,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:09,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507033726] [2021-06-05 05:47:09,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:10,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:10,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507033726] [2021-06-05 05:47:10,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507033726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:10,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549999853] [2021-06-05 05:47:10,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:10,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:47:10,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:10,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:47:10,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:10,306 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:47:10,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 05:47:10,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:10,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:10,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:10,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-06-05 05:47:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:10,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549999853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:10,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:10,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:47:10,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427066095] [2021-06-05 05:47:10,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:47:10,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:10,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:47:10,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:47:10,415 INFO L87 Difference]: Start difference. First operand 1494 states and 3023 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:11,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:11,623 INFO L93 Difference]: Finished difference Result 1719 states and 3443 transitions. [2021-06-05 05:47:11,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:47:11,624 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:47:11,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:11,625 INFO L225 Difference]: With dead ends: 1719 [2021-06-05 05:47:11,625 INFO L226 Difference]: Without dead ends: 1623 [2021-06-05 05:47:11,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 982.0ms TimeCoverageRelationStatistics Valid=293, Invalid=3013, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:47:11,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-06-05 05:47:11,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1538. [2021-06-05 05:47:11,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 2.0286271958360445) internal successors, (3118), 1537 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:11,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 3118 transitions. [2021-06-05 05:47:11,637 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 3118 transitions. Word has length 33 [2021-06-05 05:47:11,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:11,637 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 3118 transitions. [2021-06-05 05:47:11,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:11,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 3118 transitions. [2021-06-05 05:47:11,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:47:11,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:11,638 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:11,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:11,838 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:11,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:11,839 INFO L82 PathProgramCache]: Analyzing trace with hash 280791093, now seen corresponding path program 127 times [2021-06-05 05:47:11,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:11,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817939602] [2021-06-05 05:47:11,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:12,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:12,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817939602] [2021-06-05 05:47:12,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817939602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:12,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654669492] [2021-06-05 05:47:12,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:12,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:12,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:47:12,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:12,269 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:47:12,270 INFO L388 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 36 treesize of output 16 [2021-06-05 05:47:12,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:12,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:12,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:12,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-06-05 05:47:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:12,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654669492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:12,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:12,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:47:12,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861826485] [2021-06-05 05:47:12,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:47:12,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:12,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:47:12,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:47:12,380 INFO L87 Difference]: Start difference. First operand 1538 states and 3118 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:14,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:14,059 INFO L93 Difference]: Finished difference Result 1837 states and 3695 transitions. [2021-06-05 05:47:14,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:47:14,059 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:47:14,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:14,061 INFO L225 Difference]: With dead ends: 1837 [2021-06-05 05:47:14,061 INFO L226 Difference]: Without dead ends: 1735 [2021-06-05 05:47:14,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 1372.3ms TimeCoverageRelationStatistics Valid=453, Invalid=4517, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:47:14,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2021-06-05 05:47:14,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1580. [2021-06-05 05:47:14,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 2.031665611146295) internal successors, (3208), 1579 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:14,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 3208 transitions. [2021-06-05 05:47:14,074 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 3208 transitions. Word has length 33 [2021-06-05 05:47:14,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:14,074 INFO L482 AbstractCegarLoop]: Abstraction has 1580 states and 3208 transitions. [2021-06-05 05:47:14,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:14,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 3208 transitions. [2021-06-05 05:47:14,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:47:14,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:14,075 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:14,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:14,276 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:14,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:14,276 INFO L82 PathProgramCache]: Analyzing trace with hash -360319497, now seen corresponding path program 128 times [2021-06-05 05:47:14,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:14,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567914615] [2021-06-05 05:47:14,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:14,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:14,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567914615] [2021-06-05 05:47:14,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567914615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:14,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407768564] [2021-06-05 05:47:14,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:14,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:47:14,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:14,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:47:14,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:14,699 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:47:14,700 INFO L388 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 36 treesize of output 16 [2021-06-05 05:47:14,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:14,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:14,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:14,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-06-05 05:47:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:14,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407768564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:14,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:14,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:47:14,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563646480] [2021-06-05 05:47:14,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:47:14,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:14,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:47:14,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:47:14,826 INFO L87 Difference]: Start difference. First operand 1580 states and 3208 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:17,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:17,149 INFO L93 Difference]: Finished difference Result 1994 states and 4027 transitions. [2021-06-05 05:47:17,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 05:47:17,149 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:47:17,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:17,151 INFO L225 Difference]: With dead ends: 1994 [2021-06-05 05:47:17,151 INFO L226 Difference]: Without dead ends: 1895 [2021-06-05 05:47:17,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2533 ImplicationChecksByTransitivity, 1863.8ms TimeCoverageRelationStatistics Valid=766, Invalid=7066, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 05:47:17,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-06-05 05:47:17,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1605. [2021-06-05 05:47:17,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 2.0311720698254363) internal successors, (3258), 1604 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:17,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 3258 transitions. [2021-06-05 05:47:17,165 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 3258 transitions. Word has length 33 [2021-06-05 05:47:17,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:17,165 INFO L482 AbstractCegarLoop]: Abstraction has 1605 states and 3258 transitions. [2021-06-05 05:47:17,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:17,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 3258 transitions. [2021-06-05 05:47:17,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:47:17,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:17,166 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:17,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-05 05:47:17,374 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:17,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:17,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1065922869, now seen corresponding path program 129 times [2021-06-05 05:47:17,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:17,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956811988] [2021-06-05 05:47:17,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:17,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:17,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956811988] [2021-06-05 05:47:17,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956811988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:17,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919493769] [2021-06-05 05:47:17,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:17,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:47:17,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:17,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:47:17,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:17,788 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:47:17,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 05:47:17,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:17,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:17,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:17,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-06-05 05:47:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:17,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919493769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:17,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:17,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:47:17,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575740540] [2021-06-05 05:47:17,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:47:17,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:17,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:47:17,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:47:17,934 INFO L87 Difference]: Start difference. First operand 1605 states and 3258 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:20,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:20,523 INFO L93 Difference]: Finished difference Result 2110 states and 4259 transitions. [2021-06-05 05:47:20,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 05:47:20,523 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:47:20,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:20,525 INFO L225 Difference]: With dead ends: 2110 [2021-06-05 05:47:20,525 INFO L226 Difference]: Without dead ends: 2048 [2021-06-05 05:47:20,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2780 ImplicationChecksByTransitivity, 1989.7ms TimeCoverageRelationStatistics Valid=807, Invalid=7749, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 05:47:20,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-06-05 05:47:20,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1696. [2021-06-05 05:47:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 2.033628318584071) internal successors, (3447), 1695 states have internal predecessors, (3447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:20,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 3447 transitions. [2021-06-05 05:47:20,539 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 3447 transitions. Word has length 33 [2021-06-05 05:47:20,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:20,539 INFO L482 AbstractCegarLoop]: Abstraction has 1696 states and 3447 transitions. [2021-06-05 05:47:20,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:20,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 3447 transitions. [2021-06-05 05:47:20,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:47:20,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:20,541 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:20,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:20,741 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:20,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:20,741 INFO L82 PathProgramCache]: Analyzing trace with hash 151290123, now seen corresponding path program 130 times [2021-06-05 05:47:20,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:20,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346955347] [2021-06-05 05:47:20,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:20,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:20,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346955347] [2021-06-05 05:47:20,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346955347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:20,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688961183] [2021-06-05 05:47:20,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:20,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:47:20,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:20,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:47:20,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:21,137 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:47:21,137 INFO L388 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 36 treesize of output 16 [2021-06-05 05:47:21,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:21,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:21,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:21,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-06-05 05:47:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:21,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688961183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:21,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:21,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:47:21,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510492026] [2021-06-05 05:47:21,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:47:21,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:21,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:47:21,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:47:21,297 INFO L87 Difference]: Start difference. First operand 1696 states and 3447 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:22,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:22,778 INFO L93 Difference]: Finished difference Result 1992 states and 4011 transitions. [2021-06-05 05:47:22,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:47:22,779 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:47:22,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:22,780 INFO L225 Difference]: With dead ends: 1992 [2021-06-05 05:47:22,780 INFO L226 Difference]: Without dead ends: 1936 [2021-06-05 05:47:22,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1233.0ms TimeCoverageRelationStatistics Valid=417, Invalid=3873, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:47:22,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-06-05 05:47:22,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1752. [2021-06-05 05:47:22,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.031410622501428) internal successors, (3557), 1751 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 3557 transitions. [2021-06-05 05:47:22,795 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 3557 transitions. Word has length 33 [2021-06-05 05:47:22,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:22,795 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 3557 transitions. [2021-06-05 05:47:22,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 3557 transitions. [2021-06-05 05:47:22,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:47:22,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:22,797 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:23,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:23,012 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:23,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:23,012 INFO L82 PathProgramCache]: Analyzing trace with hash 154706401, now seen corresponding path program 131 times [2021-06-05 05:47:23,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:23,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644328229] [2021-06-05 05:47:23,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:23,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:23,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644328229] [2021-06-05 05:47:23,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644328229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:23,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762528218] [2021-06-05 05:47:23,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:23,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:47:23,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:23,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:47:23,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:23,469 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:47:23,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 05:47:23,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:23,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:23,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:23,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-06-05 05:47:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:23,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762528218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:23,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:23,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:47:23,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143120450] [2021-06-05 05:47:23,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:47:23,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:23,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:47:23,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:47:23,582 INFO L87 Difference]: Start difference. First operand 1752 states and 3557 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:25,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:25,524 INFO L93 Difference]: Finished difference Result 2256 states and 4557 transitions. [2021-06-05 05:47:25,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 05:47:25,524 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:47:25,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:25,526 INFO L225 Difference]: With dead ends: 2256 [2021-06-05 05:47:25,526 INFO L226 Difference]: Without dead ends: 2168 [2021-06-05 05:47:25,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1648.3ms TimeCoverageRelationStatistics Valid=531, Invalid=5631, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:47:25,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2021-06-05 05:47:25,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 1988. [2021-06-05 05:47:25,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 2.030699547055863) internal successors, (4035), 1987 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:25,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 4035 transitions. [2021-06-05 05:47:25,542 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 4035 transitions. Word has length 33 [2021-06-05 05:47:25,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:25,542 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 4035 transitions. [2021-06-05 05:47:25,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:25,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 4035 transitions. [2021-06-05 05:47:25,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:47:25,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:25,544 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:25,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 05:47:25,744 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:25,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:25,745 INFO L82 PathProgramCache]: Analyzing trace with hash -486404189, now seen corresponding path program 132 times [2021-06-05 05:47:25,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:25,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081138765] [2021-06-05 05:47:25,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:25,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:25,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081138765] [2021-06-05 05:47:25,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081138765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:25,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422746546] [2021-06-05 05:47:25,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:25,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:47:25,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:25,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:47:25,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:26,174 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:47:26,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 05:47:26,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:26,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:26,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:26,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-06-05 05:47:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:26,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422746546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:26,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:26,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:47:26,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130088924] [2021-06-05 05:47:26,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:47:26,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:26,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:47:26,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:47:26,298 INFO L87 Difference]: Start difference. First operand 1988 states and 4035 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:28,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:28,523 INFO L93 Difference]: Finished difference Result 2485 states and 5053 transitions. [2021-06-05 05:47:28,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 05:47:28,523 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:47:28,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:28,525 INFO L225 Difference]: With dead ends: 2485 [2021-06-05 05:47:28,526 INFO L226 Difference]: Without dead ends: 2405 [2021-06-05 05:47:28,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2482 ImplicationChecksByTransitivity, 1816.3ms TimeCoverageRelationStatistics Valid=672, Invalid=6984, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 05:47:28,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-06-05 05:47:28,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1662. [2021-06-05 05:47:28,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 2.033112582781457) internal successors, (3377), 1661 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 3377 transitions. [2021-06-05 05:47:28,542 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 3377 transitions. Word has length 33 [2021-06-05 05:47:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:28,542 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 3377 transitions. [2021-06-05 05:47:28,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:28,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 3377 transitions. [2021-06-05 05:47:28,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:47:28,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:28,543 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:28,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 05:47:28,744 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:28,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:28,744 INFO L82 PathProgramCache]: Analyzing trace with hash 939838177, now seen corresponding path program 133 times [2021-06-05 05:47:28,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:28,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941556241] [2021-06-05 05:47:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:28,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:28,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941556241] [2021-06-05 05:47:28,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941556241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:28,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668594714] [2021-06-05 05:47:28,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:28,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:47:28,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:29,173 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:47:29,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 05:47:29,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:29,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:29,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:29,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-06-05 05:47:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:29,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668594714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:29,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:29,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:47:29,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795338115] [2021-06-05 05:47:29,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:47:29,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:29,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:47:29,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:47:29,295 INFO L87 Difference]: Start difference. First operand 1662 states and 3377 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:31,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:31,540 INFO L93 Difference]: Finished difference Result 2226 states and 4483 transitions. [2021-06-05 05:47:31,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 05:47:31,541 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:47:31,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:31,543 INFO L225 Difference]: With dead ends: 2226 [2021-06-05 05:47:31,543 INFO L226 Difference]: Without dead ends: 2170 [2021-06-05 05:47:31,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2802 ImplicationChecksByTransitivity, 1983.3ms TimeCoverageRelationStatistics Valid=763, Invalid=7793, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 05:47:31,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-06-05 05:47:31,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1536. [2021-06-05 05:47:31,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.0273615635179154) internal successors, (3112), 1535 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:31,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3112 transitions. [2021-06-05 05:47:31,556 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3112 transitions. Word has length 33 [2021-06-05 05:47:31,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:31,556 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 3112 transitions. [2021-06-05 05:47:31,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:31,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3112 transitions. [2021-06-05 05:47:31,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:47:31,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:31,558 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:31,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 05:47:31,759 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:31,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:31,759 INFO L82 PathProgramCache]: Analyzing trace with hash 834991559, now seen corresponding path program 134 times [2021-06-05 05:47:31,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:31,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386493602] [2021-06-05 05:47:31,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:31,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:31,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386493602] [2021-06-05 05:47:31,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386493602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:31,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913869329] [2021-06-05 05:47:31,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:31,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:47:31,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:31,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:47:31,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:32,156 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:47:32,156 INFO L388 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 36 treesize of output 16 [2021-06-05 05:47:32,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:32,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:32,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:32,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-06-05 05:47:32,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:32,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913869329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:32,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:32,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:47:32,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092275701] [2021-06-05 05:47:32,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:47:32,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:32,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:47:32,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:47:32,303 INFO L87 Difference]: Start difference. First operand 1536 states and 3112 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:33,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:33,940 INFO L93 Difference]: Finished difference Result 2035 states and 4093 transitions. [2021-06-05 05:47:33,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:47:33,940 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:47:33,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:33,942 INFO L225 Difference]: With dead ends: 2035 [2021-06-05 05:47:33,942 INFO L226 Difference]: Without dead ends: 1979 [2021-06-05 05:47:33,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 1337.0ms TimeCoverageRelationStatistics Valid=466, Invalid=4226, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:47:33,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2021-06-05 05:47:33,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1471. [2021-06-05 05:47:33,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.0258503401360546) internal successors, (2978), 1470 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:33,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 2978 transitions. [2021-06-05 05:47:33,954 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 2978 transitions. Word has length 33 [2021-06-05 05:47:33,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:33,954 INFO L482 AbstractCegarLoop]: Abstraction has 1471 states and 2978 transitions. [2021-06-05 05:47:33,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:33,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 2978 transitions. [2021-06-05 05:47:33,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:47:33,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:33,955 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:34,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:34,156 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:34,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:34,156 INFO L82 PathProgramCache]: Analyzing trace with hash -2101647219, now seen corresponding path program 135 times [2021-06-05 05:47:34,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:34,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352383420] [2021-06-05 05:47:34,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:34,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:34,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352383420] [2021-06-05 05:47:34,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352383420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:34,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425114002] [2021-06-05 05:47:34,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:34,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:47:34,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:34,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:47:34,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:34,616 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:47:34,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 05:47:34,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:34,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:34,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:34,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-06-05 05:47:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:34,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425114002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:34,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:34,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:47:34,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355115099] [2021-06-05 05:47:34,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:47:34,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:34,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:47:34,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:47:34,724 INFO L87 Difference]: Start difference. First operand 1471 states and 2978 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:35,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:35,763 INFO L93 Difference]: Finished difference Result 1668 states and 3337 transitions. [2021-06-05 05:47:35,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:47:35,764 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:47:35,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:35,765 INFO L225 Difference]: With dead ends: 1668 [2021-06-05 05:47:35,765 INFO L226 Difference]: Without dead ends: 1572 [2021-06-05 05:47:35,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 941.6ms TimeCoverageRelationStatistics Valid=296, Invalid=2896, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:47:35,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-06-05 05:47:35,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1496. [2021-06-05 05:47:35,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.025418060200669) internal successors, (3028), 1495 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:35,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3028 transitions. [2021-06-05 05:47:35,781 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3028 transitions. Word has length 33 [2021-06-05 05:47:35,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:35,781 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 3028 transitions. [2021-06-05 05:47:35,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:35,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3028 transitions. [2021-06-05 05:47:35,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:47:35,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:35,782 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:35,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:35,983 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:35,983 INFO L82 PathProgramCache]: Analyzing trace with hash -716024629, now seen corresponding path program 136 times [2021-06-05 05:47:35,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:35,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685556582] [2021-06-05 05:47:35,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:36,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:36,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685556582] [2021-06-05 05:47:36,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685556582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:36,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064543064] [2021-06-05 05:47:36,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:36,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:47:36,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:36,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:47:36,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:36,435 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:47:36,435 INFO L388 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 36 treesize of output 16 [2021-06-05 05:47:36,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:36,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:36,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:36,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-06-05 05:47:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:36,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064543064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:36,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:36,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:47:36,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352846123] [2021-06-05 05:47:36,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:47:36,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:36,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:47:36,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:47:36,540 INFO L87 Difference]: Start difference. First operand 1496 states and 3028 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:37,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:37,622 INFO L93 Difference]: Finished difference Result 1683 states and 3373 transitions. [2021-06-05 05:47:37,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:47:37,622 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:47:37,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:37,623 INFO L225 Difference]: With dead ends: 1683 [2021-06-05 05:47:37,623 INFO L226 Difference]: Without dead ends: 1595 [2021-06-05 05:47:37,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 963.0ms TimeCoverageRelationStatistics Valid=300, Invalid=2892, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:47:37,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-06-05 05:47:37,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1499. [2021-06-05 05:47:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 2.0253671562082776) internal successors, (3034), 1498 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:37,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 3034 transitions. [2021-06-05 05:47:37,635 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 3034 transitions. Word has length 33 [2021-06-05 05:47:37,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:37,635 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 3034 transitions. [2021-06-05 05:47:37,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:37,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 3034 transitions. [2021-06-05 05:47:37,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:47:37,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:37,636 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:37,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:37,836 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:37,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:37,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1357135219, now seen corresponding path program 137 times [2021-06-05 05:47:37,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:37,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466540537] [2021-06-05 05:47:37,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:38,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:38,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466540537] [2021-06-05 05:47:38,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466540537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:38,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084591970] [2021-06-05 05:47:38,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:38,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:47:38,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:38,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:47:38,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:38,263 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:47:38,263 INFO L388 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 36 treesize of output 16 [2021-06-05 05:47:38,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:38,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:38,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:38,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-06-05 05:47:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:38,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084591970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:38,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:38,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:47:38,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515556636] [2021-06-05 05:47:38,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:47:38,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:38,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:47:38,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:47:38,385 INFO L87 Difference]: Start difference. First operand 1499 states and 3034 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:39,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:39,788 INFO L93 Difference]: Finished difference Result 1771 states and 3554 transitions. [2021-06-05 05:47:39,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:47:39,788 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:47:39,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:39,789 INFO L225 Difference]: With dead ends: 1771 [2021-06-05 05:47:39,789 INFO L226 Difference]: Without dead ends: 1675 [2021-06-05 05:47:39,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 1337.8ms TimeCoverageRelationStatistics Valid=507, Invalid=4605, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:47:39,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2021-06-05 05:47:39,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1504. [2021-06-05 05:47:39,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 2.0246174318030605) internal successors, (3043), 1503 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:39,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 3043 transitions. [2021-06-05 05:47:39,801 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 3043 transitions. Word has length 33 [2021-06-05 05:47:39,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:39,801 INFO L482 AbstractCegarLoop]: Abstraction has 1504 states and 3043 transitions. [2021-06-05 05:47:39,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:39,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 3043 transitions. [2021-06-05 05:47:39,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:47:39,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:39,802 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:40,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 05:47:40,003 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:40,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:40,003 INFO L82 PathProgramCache]: Analyzing trace with hash 69107147, now seen corresponding path program 138 times [2021-06-05 05:47:40,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:40,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658818301] [2021-06-05 05:47:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:40,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:40,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658818301] [2021-06-05 05:47:40,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658818301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:40,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044629060] [2021-06-05 05:47:40,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:40,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:47:40,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:40,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:47:40,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:40,449 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:47:40,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 05:47:40,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:40,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:40,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:40,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-06-05 05:47:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:40,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044629060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:40,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:40,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:47:40,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891620280] [2021-06-05 05:47:40,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:47:40,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:40,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:47:40,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:47:40,573 INFO L87 Difference]: Start difference. First operand 1504 states and 3043 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:42,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:42,502 INFO L93 Difference]: Finished difference Result 1940 states and 3886 transitions. [2021-06-05 05:47:42,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 05:47:42,503 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:47:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:42,504 INFO L225 Difference]: With dead ends: 1940 [2021-06-05 05:47:42,504 INFO L226 Difference]: Without dead ends: 1862 [2021-06-05 05:47:42,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2334 ImplicationChecksByTransitivity, 1697.6ms TimeCoverageRelationStatistics Valid=695, Invalid=6445, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 05:47:42,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-06-05 05:47:42,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1495. [2021-06-05 05:47:42,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0234270414993305) internal successors, (3023), 1494 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:42,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3023 transitions. [2021-06-05 05:47:42,522 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3023 transitions. Word has length 33 [2021-06-05 05:47:42,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:42,522 INFO L482 AbstractCegarLoop]: Abstraction has 1495 states and 3023 transitions. [2021-06-05 05:47:42,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:42,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3023 transitions. [2021-06-05 05:47:42,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:47:42,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:42,524 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:42,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 05:47:42,724 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:42,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:42,724 INFO L82 PathProgramCache]: Analyzing trace with hash -845525599, now seen corresponding path program 139 times [2021-06-05 05:47:42,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:42,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019277117] [2021-06-05 05:47:42,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:42,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:42,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019277117] [2021-06-05 05:47:42,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019277117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:42,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053980942] [2021-06-05 05:47:42,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:42,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:47:42,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:43,118 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:47:43,118 INFO L388 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 36 treesize of output 16 [2021-06-05 05:47:43,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:43,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:43,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:43,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-06-05 05:47:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:43,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053980942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:43,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:43,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-06-05 05:47:43,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204580391] [2021-06-05 05:47:43,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:47:43,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:43,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:47:43,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:47:43,267 INFO L87 Difference]: Start difference. First operand 1495 states and 3023 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:44,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:44,810 INFO L93 Difference]: Finished difference Result 1704 states and 3411 transitions. [2021-06-05 05:47:44,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:47:44,810 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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 33 [2021-06-05 05:47:44,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:44,812 INFO L225 Difference]: With dead ends: 1704 [2021-06-05 05:47:44,812 INFO L226 Difference]: Without dead ends: 1642 [2021-06-05 05:47:44,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 1345.2ms TimeCoverageRelationStatistics Valid=515, Invalid=4741, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:47:44,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-06-05 05:47:44,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1472. [2021-06-05 05:47:44,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.025832766825289) internal successors, (2980), 1471 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2980 transitions. [2021-06-05 05:47:44,823 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2980 transitions. Word has length 33 [2021-06-05 05:47:44,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:44,823 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 2980 transitions. [2021-06-05 05:47:44,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 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) [2021-06-05 05:47:44,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2980 transitions. [2021-06-05 05:47:44,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:47:44,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:44,824 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:45,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:45,029 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:45,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:45,029 INFO L82 PathProgramCache]: Analyzing trace with hash -349346937, now seen corresponding path program 140 times [2021-06-05 05:47:45,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:45,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189502364] [2021-06-05 05:47:45,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:45,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:45,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189502364] [2021-06-05 05:47:45,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189502364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:45,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950245770] [2021-06-05 05:47:45,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:45,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:47:45,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:45,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:47:45,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:45,469 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:47:45,469 INFO L388 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 36 treesize of output 16 [2021-06-05 05:47:45,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:45,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:45,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:45,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-06-05 05:47:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:45,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950245770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:45,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:45,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-06-05 05:47:45,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859175001] [2021-06-05 05:47:45,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:47:45,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:45,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:47:45,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:47:45,571 INFO L87 Difference]: Start difference. First operand 1472 states and 2980 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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) [2021-06-05 05:47:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:46,805 INFO L93 Difference]: Finished difference Result 1656 states and 3314 transitions. [2021-06-05 05:47:46,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:47:46,806 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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 33 [2021-06-05 05:47:46,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:46,807 INFO L225 Difference]: With dead ends: 1656 [2021-06-05 05:47:46,807 INFO L226 Difference]: Without dead ends: 1568 [2021-06-05 05:47:46,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1143.0ms TimeCoverageRelationStatistics Valid=332, Invalid=3208, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:47:46,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2021-06-05 05:47:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1494. [2021-06-05 05:47:46,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.024112525117214) internal successors, (3022), 1493 states have internal predecessors, (3022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:46,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3022 transitions. [2021-06-05 05:47:46,819 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3022 transitions. Word has length 33 [2021-06-05 05:47:46,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:46,819 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 3022 transitions. [2021-06-05 05:47:46,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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) [2021-06-05 05:47:46,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3022 transitions. [2021-06-05 05:47:46,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:47:46,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:46,820 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:47,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable174 [2021-06-05 05:47:47,021 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:47,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:47,021 INFO L82 PathProgramCache]: Analyzing trace with hash -990457527, now seen corresponding path program 141 times [2021-06-05 05:47:47,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:47,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285049512] [2021-06-05 05:47:47,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:47,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:47,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:47,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285049512] [2021-06-05 05:47:47,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285049512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:47,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939334664] [2021-06-05 05:47:47,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:47,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:47:47,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:47,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:47:47,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:47,463 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:47:47,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 05:47:47,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:47,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:47,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:47,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-06-05 05:47:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:47,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939334664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:47,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:47,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-06-05 05:47:47,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075464040] [2021-06-05 05:47:47,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:47:47,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:47,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:47:47,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:47:47,583 INFO L87 Difference]: Start difference. First operand 1494 states and 3022 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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) [2021-06-05 05:47:48,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:48,926 INFO L93 Difference]: Finished difference Result 1676 states and 3358 transitions. [2021-06-05 05:47:48,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:47:48,926 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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 33 [2021-06-05 05:47:48,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:48,928 INFO L225 Difference]: With dead ends: 1676 [2021-06-05 05:47:48,928 INFO L226 Difference]: Without dead ends: 1604 [2021-06-05 05:47:48,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 1259.0ms TimeCoverageRelationStatistics Valid=426, Invalid=3864, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:47:48,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-06-05 05:47:48,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1495. [2021-06-05 05:47:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0240963855421685) internal successors, (3024), 1494 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:48,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3024 transitions. [2021-06-05 05:47:48,940 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3024 transitions. Word has length 33 [2021-06-05 05:47:48,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:48,940 INFO L482 AbstractCegarLoop]: Abstraction has 1495 states and 3024 transitions. [2021-06-05 05:47:48,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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) [2021-06-05 05:47:48,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3024 transitions. [2021-06-05 05:47:48,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:47:48,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:48,941 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:49,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:49,142 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:49,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:49,142 INFO L82 PathProgramCache]: Analyzing trace with hash 435784839, now seen corresponding path program 142 times [2021-06-05 05:47:49,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:49,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994935133] [2021-06-05 05:47:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:49,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:49,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994935133] [2021-06-05 05:47:49,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994935133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:49,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445840921] [2021-06-05 05:47:49,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:49,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:47:49,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:49,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:47:49,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:49,547 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:47:49,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 05:47:49,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:49,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:49,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:49,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-06-05 05:47:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:49,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445840921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:49,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:49,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-06-05 05:47:49,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797763988] [2021-06-05 05:47:49,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:47:49,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:49,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:47:49,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:47:49,666 INFO L87 Difference]: Start difference. First operand 1495 states and 3024 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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) [2021-06-05 05:47:51,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:51,310 INFO L93 Difference]: Finished difference Result 1714 states and 3440 transitions. [2021-06-05 05:47:51,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:47:51,310 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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 33 [2021-06-05 05:47:51,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:51,312 INFO L225 Difference]: With dead ends: 1714 [2021-06-05 05:47:51,312 INFO L226 Difference]: Without dead ends: 1652 [2021-06-05 05:47:51,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1608 ImplicationChecksByTransitivity, 1467.4ms TimeCoverageRelationStatistics Valid=542, Invalid=4714, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:47:51,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-06-05 05:47:51,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1462. [2021-06-05 05:47:51,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 2.027378507871321) internal successors, (2962), 1461 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 2962 transitions. [2021-06-05 05:47:51,323 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 2962 transitions. Word has length 33 [2021-06-05 05:47:51,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:51,323 INFO L482 AbstractCegarLoop]: Abstraction has 1462 states and 2962 transitions. [2021-06-05 05:47:51,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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) [2021-06-05 05:47:51,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 2962 transitions. [2021-06-05 05:47:51,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:47:51,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:51,324 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:51,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 05:47:51,525 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:51,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:51,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1387234304, now seen corresponding path program 143 times [2021-06-05 05:47:51,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:51,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34278240] [2021-06-05 05:47:51,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:51,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:51,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34278240] [2021-06-05 05:47:51,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34278240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:51,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322898061] [2021-06-05 05:47:51,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:47:51,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:47:51,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:51,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:47:51,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:51,632 INFO L388 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 [2021-06-05 05:47:51,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:51,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:51,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:51,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:47:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:51,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322898061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:51,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:51,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 05:47:51,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686103153] [2021-06-05 05:47:51,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:47:51,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:51,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:47:51,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:47:51,640 INFO L87 Difference]: Start difference. First operand 1462 states and 2962 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:51,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:51,892 INFO L93 Difference]: Finished difference Result 1735 states and 3460 transitions. [2021-06-05 05:47:51,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:47:51,893 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 05:47:51,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:51,894 INFO L225 Difference]: With dead ends: 1735 [2021-06-05 05:47:51,894 INFO L226 Difference]: Without dead ends: 1735 [2021-06-05 05:47:51,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:47:51,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2021-06-05 05:47:51,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1322. [2021-06-05 05:47:51,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 2.0098410295230886) internal successors, (2655), 1321 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:51,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 2655 transitions. [2021-06-05 05:47:51,905 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 2655 transitions. Word has length 36 [2021-06-05 05:47:51,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:51,905 INFO L482 AbstractCegarLoop]: Abstraction has 1322 states and 2655 transitions. [2021-06-05 05:47:51,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:51,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 2655 transitions. [2021-06-05 05:47:51,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:47:51,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:51,906 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:52,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:52,107 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:52,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:52,107 INFO L82 PathProgramCache]: Analyzing trace with hash 783776818, now seen corresponding path program 144 times [2021-06-05 05:47:52,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:52,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876987511] [2021-06-05 05:47:52,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:52,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:52,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876987511] [2021-06-05 05:47:52,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876987511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:52,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668904493] [2021-06-05 05:47:52,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:52,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:47:52,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:52,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:47:52,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:52,184 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:52,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668904493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:52,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:52,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 05:47:52,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971453417] [2021-06-05 05:47:52,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:47:52,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:52,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:47:52,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:47:52,184 INFO L87 Difference]: Start difference. First operand 1322 states and 2655 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:52,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:52,201 INFO L93 Difference]: Finished difference Result 1768 states and 3530 transitions. [2021-06-05 05:47:52,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:47:52,201 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 05:47:52,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:52,202 INFO L225 Difference]: With dead ends: 1768 [2021-06-05 05:47:52,202 INFO L226 Difference]: Without dead ends: 1713 [2021-06-05 05:47:52,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:47:52,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2021-06-05 05:47:52,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1600. [2021-06-05 05:47:52,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 2.038148843026892) internal successors, (3259), 1599 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:52,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 3259 transitions. [2021-06-05 05:47:52,215 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 3259 transitions. Word has length 37 [2021-06-05 05:47:52,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:52,215 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 3259 transitions. [2021-06-05 05:47:52,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:52,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 3259 transitions. [2021-06-05 05:47:52,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:47:52,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:52,216 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:52,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:52,417 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:52,417 INFO L82 PathProgramCache]: Analyzing trace with hash 2072843805, now seen corresponding path program 145 times [2021-06-05 05:47:52,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:52,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751541738] [2021-06-05 05:47:52,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:52,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:52,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751541738] [2021-06-05 05:47:52,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751541738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:52,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960233592] [2021-06-05 05:47:52,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:52,764 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:47:52,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:52,999 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 05:47:53,000 INFO L388 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 18 [2021-06-05 05:47:53,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:53,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:53,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:53,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-06-05 05:47:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:53,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960233592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:53,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:53,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 33 [2021-06-05 05:47:53,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98373026] [2021-06-05 05:47:53,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:47:53,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:53,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:47:53,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1031, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:47:53,122 INFO L87 Difference]: Start difference. First operand 1600 states and 3259 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:54,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:54,181 INFO L93 Difference]: Finished difference Result 1794 states and 3597 transitions. [2021-06-05 05:47:54,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:47:54,181 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:47:54,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:54,182 INFO L225 Difference]: With dead ends: 1794 [2021-06-05 05:47:54,182 INFO L226 Difference]: Without dead ends: 1730 [2021-06-05 05:47:54,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1050.5ms TimeCoverageRelationStatistics Valid=221, Invalid=2749, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:47:54,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-06-05 05:47:54,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1617. [2021-06-05 05:47:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 2.0340346534653464) internal successors, (3287), 1616 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:54,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 3287 transitions. [2021-06-05 05:47:54,195 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 3287 transitions. Word has length 40 [2021-06-05 05:47:54,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:54,195 INFO L482 AbstractCegarLoop]: Abstraction has 1617 states and 3287 transitions. [2021-06-05 05:47:54,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:54,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 3287 transitions. [2021-06-05 05:47:54,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:47:54,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:54,196 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:54,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 05:47:54,396 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:54,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:54,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1011750747, now seen corresponding path program 146 times [2021-06-05 05:47:54,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:54,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503990058] [2021-06-05 05:47:54,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:54,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:54,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503990058] [2021-06-05 05:47:54,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503990058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:54,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762662595] [2021-06-05 05:47:54,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:54,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:47:54,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:54,751 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:47:54,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:55,044 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 05:47:55,044 INFO L388 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 18 [2021-06-05 05:47:55,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:55,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:55,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:55,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-06-05 05:47:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:55,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762662595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:55,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:55,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-06-05 05:47:55,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103594395] [2021-06-05 05:47:55,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:47:55,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:55,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:47:55,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:47:55,161 INFO L87 Difference]: Start difference. First operand 1617 states and 3287 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:56,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:56,651 INFO L93 Difference]: Finished difference Result 1818 states and 3644 transitions. [2021-06-05 05:47:56,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:47:56,652 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:47:56,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:56,653 INFO L225 Difference]: With dead ends: 1818 [2021-06-05 05:47:56,653 INFO L226 Difference]: Without dead ends: 1754 [2021-06-05 05:47:56,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1172.7ms TimeCoverageRelationStatistics Valid=244, Invalid=3062, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:47:56,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2021-06-05 05:47:56,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1623. [2021-06-05 05:47:56,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 2.0357583230579532) internal successors, (3302), 1622 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:56,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 3302 transitions. [2021-06-05 05:47:56,666 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 3302 transitions. Word has length 40 [2021-06-05 05:47:56,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:56,666 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 3302 transitions. [2021-06-05 05:47:56,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:56,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 3302 transitions. [2021-06-05 05:47:56,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:47:56,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:56,668 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:56,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:56,868 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:56,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:56,868 INFO L82 PathProgramCache]: Analyzing trace with hash -666824675, now seen corresponding path program 147 times [2021-06-05 05:47:56,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:56,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179845726] [2021-06-05 05:47:56,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:57,195 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:57,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:57,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179845726] [2021-06-05 05:47:57,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179845726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:57,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881233953] [2021-06-05 05:47:57,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:57,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:47:57,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:57,221 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:47:57,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:57,514 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:47:57,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:47:57,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:57,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:57,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:57,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-06-05 05:47:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:57,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881233953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:57,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:57,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-06-05 05:47:57,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366933221] [2021-06-05 05:47:57,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:47:57,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:57,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:47:57,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:47:57,643 INFO L87 Difference]: Start difference. First operand 1623 states and 3302 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:58,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:58,891 INFO L93 Difference]: Finished difference Result 1843 states and 3691 transitions. [2021-06-05 05:47:58,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:47:58,891 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:47:58,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:58,893 INFO L225 Difference]: With dead ends: 1843 [2021-06-05 05:47:58,893 INFO L226 Difference]: Without dead ends: 1779 [2021-06-05 05:47:58,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1191.0ms TimeCoverageRelationStatistics Valid=242, Invalid=3064, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:47:58,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2021-06-05 05:47:58,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1624. [2021-06-05 05:47:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 2.0357362908194703) internal successors, (3304), 1623 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 3304 transitions. [2021-06-05 05:47:58,905 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 3304 transitions. Word has length 40 [2021-06-05 05:47:58,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:58,905 INFO L482 AbstractCegarLoop]: Abstraction has 1624 states and 3304 transitions. [2021-06-05 05:47:58,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:58,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 3304 transitions. [2021-06-05 05:47:58,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:47:58,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:58,907 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:59,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:59,107 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:59,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:59,108 INFO L82 PathProgramCache]: Analyzing trace with hash -252990117, now seen corresponding path program 148 times [2021-06-05 05:47:59,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:59,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634957137] [2021-06-05 05:47:59,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:59,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:59,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634957137] [2021-06-05 05:47:59,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634957137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:59,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137454158] [2021-06-05 05:47:59,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:59,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:47:59,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:59,452 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:47:59,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:59,732 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 05:47:59,732 INFO L388 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 18 [2021-06-05 05:47:59,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:47:59,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:47:59,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:47:59,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-06-05 05:47:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:59,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137454158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:59,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:59,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-06-05 05:47:59,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928680503] [2021-06-05 05:47:59,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:47:59,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:59,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:47:59,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:47:59,854 INFO L87 Difference]: Start difference. First operand 1624 states and 3304 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:01,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:01,498 INFO L93 Difference]: Finished difference Result 1881 states and 3769 transitions. [2021-06-05 05:48:01,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:48:01,498 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:48:01,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:01,499 INFO L225 Difference]: With dead ends: 1881 [2021-06-05 05:48:01,499 INFO L226 Difference]: Without dead ends: 1817 [2021-06-05 05:48:01,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1254.2ms TimeCoverageRelationStatistics Valid=254, Invalid=3286, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:48:01,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2021-06-05 05:48:01,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1628. [2021-06-05 05:48:01,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1627 states have (on average 2.0356484326982174) internal successors, (3312), 1627 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:01,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 3312 transitions. [2021-06-05 05:48:01,512 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 3312 transitions. Word has length 40 [2021-06-05 05:48:01,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:01,512 INFO L482 AbstractCegarLoop]: Abstraction has 1628 states and 3312 transitions. [2021-06-05 05:48:01,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:01,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 3312 transitions. [2021-06-05 05:48:01,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:48:01,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:01,514 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:01,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:01,714 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:01,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:01,714 INFO L82 PathProgramCache]: Analyzing trace with hash -924554723, now seen corresponding path program 149 times [2021-06-05 05:48:01,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:01,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907089923] [2021-06-05 05:48:01,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:02,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:02,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907089923] [2021-06-05 05:48:02,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907089923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:02,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683129416] [2021-06-05 05:48:02,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:02,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:48:02,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:02,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:48:02,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:02,371 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:48:02,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:48:02,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:02,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:02,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:02,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-06-05 05:48:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:02,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683129416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:02,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:02,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-06-05 05:48:02,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754582087] [2021-06-05 05:48:02,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:48:02,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:02,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:48:02,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:48:02,487 INFO L87 Difference]: Start difference. First operand 1628 states and 3312 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:04,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:04,040 INFO L93 Difference]: Finished difference Result 1922 states and 3854 transitions. [2021-06-05 05:48:04,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:48:04,041 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:48:04,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:04,042 INFO L225 Difference]: With dead ends: 1922 [2021-06-05 05:48:04,042 INFO L226 Difference]: Without dead ends: 1874 [2021-06-05 05:48:04,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1468.0ms TimeCoverageRelationStatistics Valid=322, Invalid=4100, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:48:04,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-06-05 05:48:04,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1629. [2021-06-05 05:48:04,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 2.0356265356265357) internal successors, (3314), 1628 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:04,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 3314 transitions. [2021-06-05 05:48:04,057 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 3314 transitions. Word has length 40 [2021-06-05 05:48:04,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:04,057 INFO L482 AbstractCegarLoop]: Abstraction has 1629 states and 3314 transitions. [2021-06-05 05:48:04,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:04,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 3314 transitions. [2021-06-05 05:48:04,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:48:04,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:04,058 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:04,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:04,259 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:04,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:04,259 INFO L82 PathProgramCache]: Analyzing trace with hash 461067867, now seen corresponding path program 150 times [2021-06-05 05:48:04,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:04,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216930130] [2021-06-05 05:48:04,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:04,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:04,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216930130] [2021-06-05 05:48:04,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216930130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:04,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938212570] [2021-06-05 05:48:04,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:04,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:48:04,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:04,629 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:48:04,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:05,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:05,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:05,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:05,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:05,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:05,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:48:05,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:05,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:05,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:05,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:48:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:05,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938212570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:05,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:05,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 39 [2021-06-05 05:48:05,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62727985] [2021-06-05 05:48:05,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 05:48:05,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:05,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 05:48:05,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1437, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:48:05,263 INFO L87 Difference]: Start difference. First operand 1629 states and 3314 transitions. Second operand has 40 states, 40 states have (on average 1.725) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:08,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:08,099 INFO L93 Difference]: Finished difference Result 2008 states and 4033 transitions. [2021-06-05 05:48:08,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 05:48:08,099 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.725) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:48:08,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:08,101 INFO L225 Difference]: With dead ends: 2008 [2021-06-05 05:48:08,101 INFO L226 Difference]: Without dead ends: 1964 [2021-06-05 05:48:08,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2247 ImplicationChecksByTransitivity, 2380.7ms TimeCoverageRelationStatistics Valid=564, Invalid=7446, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 05:48:08,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-06-05 05:48:08,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1644. [2021-06-05 05:48:08,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1643 states have (on average 2.037127206329884) internal successors, (3347), 1643 states have internal predecessors, (3347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:08,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 3347 transitions. [2021-06-05 05:48:08,114 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 3347 transitions. Word has length 40 [2021-06-05 05:48:08,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:08,114 INFO L482 AbstractCegarLoop]: Abstraction has 1644 states and 3347 transitions. [2021-06-05 05:48:08,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.725) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:08,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 3347 transitions. [2021-06-05 05:48:08,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:48:08,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:08,115 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:08,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:08,317 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:08,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:08,317 INFO L82 PathProgramCache]: Analyzing trace with hash -180042723, now seen corresponding path program 151 times [2021-06-05 05:48:08,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:08,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891537778] [2021-06-05 05:48:08,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:08,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:08,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891537778] [2021-06-05 05:48:08,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891537778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:08,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73986413] [2021-06-05 05:48:08,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:08,659 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:48:08,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:08,938 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:48:08,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:48:08,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:08,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:08,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:08,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-06-05 05:48:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:09,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73986413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:09,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:09,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-06-05 05:48:09,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755854020] [2021-06-05 05:48:09,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:48:09,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:09,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:48:09,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:48:09,085 INFO L87 Difference]: Start difference. First operand 1644 states and 3347 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:10,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:10,944 INFO L93 Difference]: Finished difference Result 2043 states and 4097 transitions. [2021-06-05 05:48:10,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:48:10,944 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:48:10,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:10,946 INFO L225 Difference]: With dead ends: 2043 [2021-06-05 05:48:10,946 INFO L226 Difference]: Without dead ends: 1986 [2021-06-05 05:48:10,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 1634.5ms TimeCoverageRelationStatistics Valid=384, Invalid=4872, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:48:10,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2021-06-05 05:48:10,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1637. [2021-06-05 05:48:10,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 2.0354523227383865) internal successors, (3330), 1636 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:10,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 3330 transitions. [2021-06-05 05:48:10,959 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 3330 transitions. Word has length 40 [2021-06-05 05:48:10,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:10,959 INFO L482 AbstractCegarLoop]: Abstraction has 1637 states and 3330 transitions. [2021-06-05 05:48:10,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:10,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 3330 transitions. [2021-06-05 05:48:10,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:48:10,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:10,960 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:11,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:11,161 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:11,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:11,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1246199643, now seen corresponding path program 152 times [2021-06-05 05:48:11,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:11,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560015906] [2021-06-05 05:48:11,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:11,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:11,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560015906] [2021-06-05 05:48:11,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560015906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:11,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984894489] [2021-06-05 05:48:11,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:11,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:48:11,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:11,511 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:48:11,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:11,766 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-05 05:48:11,766 INFO L388 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 18 [2021-06-05 05:48:11,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:11,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:11,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:11,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-06-05 05:48:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:11,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984894489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:11,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:11,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-06-05 05:48:11,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419114394] [2021-06-05 05:48:11,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:48:11,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:11,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:48:11,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:48:11,905 INFO L87 Difference]: Start difference. First operand 1637 states and 3330 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:14,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:14,289 INFO L93 Difference]: Finished difference Result 2098 states and 4208 transitions. [2021-06-05 05:48:14,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:48:14,289 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:48:14,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:14,291 INFO L225 Difference]: With dead ends: 2098 [2021-06-05 05:48:14,291 INFO L226 Difference]: Without dead ends: 2054 [2021-06-05 05:48:14,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 1763.5ms TimeCoverageRelationStatistics Valid=432, Invalid=5730, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:48:14,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2021-06-05 05:48:14,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1644. [2021-06-05 05:48:14,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1643 states have (on average 2.034692635423007) internal successors, (3343), 1643 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:14,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 3343 transitions. [2021-06-05 05:48:14,304 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 3343 transitions. Word has length 40 [2021-06-05 05:48:14,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:14,305 INFO L482 AbstractCegarLoop]: Abstraction has 1644 states and 3343 transitions. [2021-06-05 05:48:14,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:14,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 3343 transitions. [2021-06-05 05:48:14,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:48:14,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:14,306 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:14,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 05:48:14,506 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:14,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:14,506 INFO L82 PathProgramCache]: Analyzing trace with hash -2047913347, now seen corresponding path program 153 times [2021-06-05 05:48:14,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:14,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947690670] [2021-06-05 05:48:14,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:14,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:14,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947690670] [2021-06-05 05:48:14,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947690670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:14,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684200369] [2021-06-05 05:48:14,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:14,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:48:14,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:14,867 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:48:14,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:15,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:15,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:15,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:15,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:15,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:15,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:15,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2021-06-05 05:48:15,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:15,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:15,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:15,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:28 [2021-06-05 05:48:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:15,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684200369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:15,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:15,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 40 [2021-06-05 05:48:15,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540710598] [2021-06-05 05:48:15,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 05:48:15,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:15,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 05:48:15,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:48:15,567 INFO L87 Difference]: Start difference. First operand 1644 states and 3343 transitions. Second operand has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:17,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:17,388 INFO L93 Difference]: Finished difference Result 1869 states and 3772 transitions. [2021-06-05 05:48:17,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:48:17,388 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:48:17,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:17,390 INFO L225 Difference]: With dead ends: 1869 [2021-06-05 05:48:17,390 INFO L226 Difference]: Without dead ends: 1827 [2021-06-05 05:48:17,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1767.5ms TimeCoverageRelationStatistics Valid=350, Invalid=4206, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:48:17,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-06-05 05:48:17,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1647. [2021-06-05 05:48:17,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 2.034021871202916) internal successors, (3348), 1646 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:17,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 3348 transitions. [2021-06-05 05:48:17,402 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 3348 transitions. Word has length 40 [2021-06-05 05:48:17,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:17,402 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 3348 transitions. [2021-06-05 05:48:17,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:17,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 3348 transitions. [2021-06-05 05:48:17,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:48:17,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:17,403 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:17,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 05:48:17,604 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:17,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:17,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1924564705, now seen corresponding path program 154 times [2021-06-05 05:48:17,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:17,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5683167] [2021-06-05 05:48:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:17,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:17,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5683167] [2021-06-05 05:48:17,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5683167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:17,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100951913] [2021-06-05 05:48:17,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:17,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:48:17,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:17,957 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:48:17,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:18,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:18,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:18,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:18,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:18,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:18,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:18,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:48:18,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:18,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:18,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:18,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:48:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:18,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100951913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:18,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:18,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:48:18,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968515042] [2021-06-05 05:48:18,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:48:18,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:18,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:48:18,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:48:18,461 INFO L87 Difference]: Start difference. First operand 1647 states and 3348 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:19,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:19,798 INFO L93 Difference]: Finished difference Result 1833 states and 3677 transitions. [2021-06-05 05:48:19,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:48:19,798 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:48:19,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:19,800 INFO L225 Difference]: With dead ends: 1833 [2021-06-05 05:48:19,800 INFO L226 Difference]: Without dead ends: 1769 [2021-06-05 05:48:19,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1211.1ms TimeCoverageRelationStatistics Valid=233, Invalid=2959, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:48:19,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-06-05 05:48:19,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1656. [2021-06-05 05:48:19,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 2.0356495468277944) internal successors, (3369), 1655 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:19,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 3369 transitions. [2021-06-05 05:48:19,813 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 3369 transitions. Word has length 40 [2021-06-05 05:48:19,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:19,813 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 3369 transitions. [2021-06-05 05:48:19,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:19,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 3369 transitions. [2021-06-05 05:48:19,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:48:19,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:19,814 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:20,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-05 05:48:20,015 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:20,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:20,015 INFO L82 PathProgramCache]: Analyzing trace with hash 691827169, now seen corresponding path program 155 times [2021-06-05 05:48:20,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:20,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018467844] [2021-06-05 05:48:20,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:20,350 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:20,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:20,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018467844] [2021-06-05 05:48:20,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018467844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:20,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940841403] [2021-06-05 05:48:20,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:20,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:48:20,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:20,375 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:48:20,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:20,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:20,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:20,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:20,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:20,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:48:20,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:20,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:20,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:20,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:48:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:21,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940841403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:21,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:21,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 42 [2021-06-05 05:48:21,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279839845] [2021-06-05 05:48:21,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:48:21,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:21,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:48:21,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1665, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:48:21,115 INFO L87 Difference]: Start difference. First operand 1656 states and 3369 transitions. Second operand has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:22,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:22,349 INFO L93 Difference]: Finished difference Result 1870 states and 3744 transitions. [2021-06-05 05:48:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:48:22,349 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:48:22,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:22,351 INFO L225 Difference]: With dead ends: 1870 [2021-06-05 05:48:22,351 INFO L226 Difference]: Without dead ends: 1806 [2021-06-05 05:48:22,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 1471.2ms TimeCoverageRelationStatistics Valid=283, Invalid=3749, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:48:22,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-06-05 05:48:22,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1657. [2021-06-05 05:48:22,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1656 states have (on average 2.0356280193236715) internal successors, (3371), 1656 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:22,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 3371 transitions. [2021-06-05 05:48:22,363 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 3371 transitions. Word has length 40 [2021-06-05 05:48:22,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:22,363 INFO L482 AbstractCegarLoop]: Abstraction has 1657 states and 3371 transitions. [2021-06-05 05:48:22,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:22,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 3371 transitions. [2021-06-05 05:48:22,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:48:22,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:22,365 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:22,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:22,565 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:22,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:22,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1105661727, now seen corresponding path program 156 times [2021-06-05 05:48:22,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:22,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98259163] [2021-06-05 05:48:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:22,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:22,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98259163] [2021-06-05 05:48:22,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98259163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:22,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182683508] [2021-06-05 05:48:22,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:22,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:48:22,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:22,922 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:48:22,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:23,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:23,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:23,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:23,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:23,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:23,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:23,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:48:23,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:23,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:23,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:23,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:48:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:23,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182683508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:23,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:23,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-06-05 05:48:23,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35002908] [2021-06-05 05:48:23,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:48:23,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:23,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:48:23,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:48:23,456 INFO L87 Difference]: Start difference. First operand 1657 states and 3371 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:25,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:25,218 INFO L93 Difference]: Finished difference Result 1870 states and 3754 transitions. [2021-06-05 05:48:25,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:48:25,219 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:48:25,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:25,220 INFO L225 Difference]: With dead ends: 1870 [2021-06-05 05:48:25,220 INFO L226 Difference]: Without dead ends: 1810 [2021-06-05 05:48:25,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1700.9ms TimeCoverageRelationStatistics Valid=332, Invalid=4360, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:48:25,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-06-05 05:48:25,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1666. [2021-06-05 05:48:25,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 2.0354354354354354) internal successors, (3389), 1665 states have internal predecessors, (3389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 3389 transitions. [2021-06-05 05:48:25,233 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 3389 transitions. Word has length 40 [2021-06-05 05:48:25,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:25,233 INFO L482 AbstractCegarLoop]: Abstraction has 1666 states and 3389 transitions. [2021-06-05 05:48:25,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:25,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 3389 transitions. [2021-06-05 05:48:25,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:48:25,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:25,234 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:25,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:25,435 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:25,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:25,435 INFO L82 PathProgramCache]: Analyzing trace with hash 434097121, now seen corresponding path program 157 times [2021-06-05 05:48:25,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:25,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899474782] [2021-06-05 05:48:25,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:25,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:25,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:25,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899474782] [2021-06-05 05:48:25,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899474782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:25,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940189531] [2021-06-05 05:48:25,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:25,788 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:48:25,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:26,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:26,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:26,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:26,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:26,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:26,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:26,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:48:26,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:26,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:26,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:26,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:48:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:26,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940189531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:26,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:26,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:48:26,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275339847] [2021-06-05 05:48:26,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:48:26,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:26,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:48:26,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:48:26,296 INFO L87 Difference]: Start difference. First operand 1666 states and 3389 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:28,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:28,038 INFO L93 Difference]: Finished difference Result 1953 states and 3910 transitions. [2021-06-05 05:48:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:48:28,039 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:48:28,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:28,040 INFO L225 Difference]: With dead ends: 1953 [2021-06-05 05:48:28,040 INFO L226 Difference]: Without dead ends: 1892 [2021-06-05 05:48:28,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1382.7ms TimeCoverageRelationStatistics Valid=271, Invalid=3389, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:48:28,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-06-05 05:48:28,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1668. [2021-06-05 05:48:28,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1667 states have (on average 2.035392921415717) internal successors, (3393), 1667 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:28,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 3393 transitions. [2021-06-05 05:48:28,053 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 3393 transitions. Word has length 40 [2021-06-05 05:48:28,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:28,053 INFO L482 AbstractCegarLoop]: Abstraction has 1668 states and 3393 transitions. [2021-06-05 05:48:28,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:28,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 3393 transitions. [2021-06-05 05:48:28,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:48:28,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:28,055 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:28,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:28,255 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:28,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:28,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1819719711, now seen corresponding path program 158 times [2021-06-05 05:48:28,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:28,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113724340] [2021-06-05 05:48:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:28,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:28,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113724340] [2021-06-05 05:48:28,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113724340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:28,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215428434] [2021-06-05 05:48:28,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:28,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:48:28,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:28,605 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:48:28,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:29,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:29,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:29,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:29,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:29,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:29,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:29,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:48:29,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:29,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:29,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:29,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:48:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:29,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215428434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:29,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:29,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:48:29,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223294275] [2021-06-05 05:48:29,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:48:29,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:29,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:48:29,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:48:29,132 INFO L87 Difference]: Start difference. First operand 1668 states and 3393 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:31,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:31,052 INFO L93 Difference]: Finished difference Result 1992 states and 3993 transitions. [2021-06-05 05:48:31,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:48:31,052 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:48:31,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:31,054 INFO L225 Difference]: With dead ends: 1992 [2021-06-05 05:48:31,054 INFO L226 Difference]: Without dead ends: 1944 [2021-06-05 05:48:31,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1536.6ms TimeCoverageRelationStatistics Valid=301, Invalid=3859, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:48:31,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-06-05 05:48:31,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1669. [2021-06-05 05:48:31,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 2.0353717026378897) internal successors, (3395), 1668 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:31,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 3395 transitions. [2021-06-05 05:48:31,067 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 3395 transitions. Word has length 40 [2021-06-05 05:48:31,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:31,067 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 3395 transitions. [2021-06-05 05:48:31,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:31,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 3395 transitions. [2021-06-05 05:48:31,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:48:31,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:31,068 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:31,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:31,269 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:31,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:31,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1178609121, now seen corresponding path program 159 times [2021-06-05 05:48:31,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:31,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648054132] [2021-06-05 05:48:31,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:31,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:31,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648054132] [2021-06-05 05:48:31,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648054132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:31,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554627337] [2021-06-05 05:48:31,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:31,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:48:31,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:31,618 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:48:31,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:31,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:31,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:31,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:31,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:31,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:31,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:31,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:48:31,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:31,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:31,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:31,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:48:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:32,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554627337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:32,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:32,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:48:32,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2184495] [2021-06-05 05:48:32,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:48:32,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:32,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:48:32,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:48:32,110 INFO L87 Difference]: Start difference. First operand 1669 states and 3395 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:33,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:33,915 INFO L93 Difference]: Finished difference Result 2019 states and 4049 transitions. [2021-06-05 05:48:33,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:48:33,915 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:48:33,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:33,916 INFO L225 Difference]: With dead ends: 2019 [2021-06-05 05:48:33,916 INFO L226 Difference]: Without dead ends: 1987 [2021-06-05 05:48:33,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1526.8ms TimeCoverageRelationStatistics Valid=332, Invalid=4090, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:48:33,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-06-05 05:48:33,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1670. [2021-06-05 05:48:33,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 2.035350509286998) internal successors, (3397), 1669 states have internal predecessors, (3397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:33,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 3397 transitions. [2021-06-05 05:48:33,929 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 3397 transitions. Word has length 40 [2021-06-05 05:48:33,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:33,929 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 3397 transitions. [2021-06-05 05:48:33,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:33,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 3397 transitions. [2021-06-05 05:48:33,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:48:33,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:33,931 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:34,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-06-05 05:48:34,131 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:34,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:34,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1690115809, now seen corresponding path program 160 times [2021-06-05 05:48:34,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:34,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768125348] [2021-06-05 05:48:34,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:34,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:34,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768125348] [2021-06-05 05:48:34,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768125348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:34,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112291083] [2021-06-05 05:48:34,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:34,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:48:34,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:34,492 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:48:34,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:34,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:34,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:34,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:34,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:34,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:34,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:48:34,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:34,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:34,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:34,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:48:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:34,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112291083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:34,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:34,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:48:34,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027308095] [2021-06-05 05:48:34,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:48:34,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:34,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:48:34,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:48:34,988 INFO L87 Difference]: Start difference. First operand 1670 states and 3397 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:37,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:37,109 INFO L93 Difference]: Finished difference Result 2095 states and 4196 transitions. [2021-06-05 05:48:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:48:37,109 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:48:37,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:37,111 INFO L225 Difference]: With dead ends: 2095 [2021-06-05 05:48:37,111 INFO L226 Difference]: Without dead ends: 2051 [2021-06-05 05:48:37,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 1754.4ms TimeCoverageRelationStatistics Valid=380, Invalid=4876, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:48:37,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-06-05 05:48:37,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1662. [2021-06-05 05:48:37,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 2.03371462974112) internal successors, (3378), 1661 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:37,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 3378 transitions. [2021-06-05 05:48:37,124 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 3378 transitions. Word has length 40 [2021-06-05 05:48:37,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:37,124 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 3378 transitions. [2021-06-05 05:48:37,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:37,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 3378 transitions. [2021-06-05 05:48:37,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:48:37,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:37,126 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:37,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 05:48:37,333 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:37,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:37,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1743439621, now seen corresponding path program 161 times [2021-06-05 05:48:37,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:37,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178672498] [2021-06-05 05:48:37,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:37,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:37,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178672498] [2021-06-05 05:48:37,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178672498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:37,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053873981] [2021-06-05 05:48:37,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:37,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:48:37,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:37,689 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:48:37,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:38,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:38,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:38,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:38,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:38,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-06-05 05:48:38,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:38,057 INFO L628 ElimStorePlain]: treesize reduction 5, result has 85.3 percent of original size [2021-06-05 05:48:38,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:38,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:63, output treesize:16 [2021-06-05 05:48:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:38,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053873981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:38,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:38,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 38 [2021-06-05 05:48:38,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254149302] [2021-06-05 05:48:38,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:48:38,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:38,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:48:38,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:48:38,299 INFO L87 Difference]: Start difference. First operand 1662 states and 3378 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:39,785 INFO L93 Difference]: Finished difference Result 1882 states and 3797 transitions. [2021-06-05 05:48:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:48:39,786 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:48:39,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:39,787 INFO L225 Difference]: With dead ends: 1882 [2021-06-05 05:48:39,787 INFO L226 Difference]: Without dead ends: 1840 [2021-06-05 05:48:39,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1454.6ms TimeCoverageRelationStatistics Valid=324, Invalid=3582, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:48:39,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-06-05 05:48:39,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1650. [2021-06-05 05:48:39,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 2.0339599757428743) internal successors, (3354), 1649 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:39,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 3354 transitions. [2021-06-05 05:48:39,801 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 3354 transitions. Word has length 40 [2021-06-05 05:48:39,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:39,801 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 3354 transitions. [2021-06-05 05:48:39,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:39,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 3354 transitions. [2021-06-05 05:48:39,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:48:39,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:39,803 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:40,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:40,003 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:40,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:40,003 INFO L82 PathProgramCache]: Analyzing trace with hash -956912675, now seen corresponding path program 162 times [2021-06-05 05:48:40,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:40,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28047130] [2021-06-05 05:48:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:40,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:40,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28047130] [2021-06-05 05:48:40,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28047130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:40,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754951995] [2021-06-05 05:48:40,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:40,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:48:40,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:40,394 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:48:40,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:40,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:40,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:48:40,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:40,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:40,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:40,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:48:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:40,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754951995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:40,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:40,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:48:40,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23482244] [2021-06-05 05:48:40,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:48:40,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:40,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:48:40,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:48:40,925 INFO L87 Difference]: Start difference. First operand 1650 states and 3354 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:42,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:42,192 INFO L93 Difference]: Finished difference Result 1785 states and 3597 transitions. [2021-06-05 05:48:42,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:48:42,193 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:48:42,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:42,194 INFO L225 Difference]: With dead ends: 1785 [2021-06-05 05:48:42,194 INFO L226 Difference]: Without dead ends: 1721 [2021-06-05 05:48:42,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1261.8ms TimeCoverageRelationStatistics Valid=233, Invalid=2847, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:48:42,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-06-05 05:48:42,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1653. [2021-06-05 05:48:42,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 2.0338983050847457) internal successors, (3360), 1652 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 3360 transitions. [2021-06-05 05:48:42,207 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 3360 transitions. Word has length 40 [2021-06-05 05:48:42,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:42,207 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 3360 transitions. [2021-06-05 05:48:42,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:42,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 3360 transitions. [2021-06-05 05:48:42,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:48:42,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:42,209 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:42,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 05:48:42,417 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:42,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:42,417 INFO L82 PathProgramCache]: Analyzing trace with hash -543078117, now seen corresponding path program 163 times [2021-06-05 05:48:42,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:42,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739422152] [2021-06-05 05:48:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:42,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:42,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739422152] [2021-06-05 05:48:42,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739422152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:42,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278644699] [2021-06-05 05:48:42,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:42,767 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:48:42,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:43,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:43,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:48:43,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:43,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:43,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:43,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:48:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:43,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278644699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:43,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:43,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:48:43,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226238211] [2021-06-05 05:48:43,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:48:43,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:43,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:48:43,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:48:43,272 INFO L87 Difference]: Start difference. First operand 1653 states and 3360 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:44,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:44,574 INFO L93 Difference]: Finished difference Result 1790 states and 3610 transitions. [2021-06-05 05:48:44,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:48:44,574 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:48:44,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:44,576 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 05:48:44,576 INFO L226 Difference]: Without dead ends: 1730 [2021-06-05 05:48:44,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1260.6ms TimeCoverageRelationStatistics Valid=245, Invalid=2947, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:48:44,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-06-05 05:48:44,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1659. [2021-06-05 05:48:44,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1658 states have (on average 2.033775633293124) internal successors, (3372), 1658 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:44,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 3372 transitions. [2021-06-05 05:48:44,588 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 3372 transitions. Word has length 40 [2021-06-05 05:48:44,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:44,588 INFO L482 AbstractCegarLoop]: Abstraction has 1659 states and 3372 transitions. [2021-06-05 05:48:44,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:44,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 3372 transitions. [2021-06-05 05:48:44,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:48:44,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:44,589 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:44,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 05:48:44,790 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:44,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:44,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1214642723, now seen corresponding path program 164 times [2021-06-05 05:48:44,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:44,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300454485] [2021-06-05 05:48:44,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:45,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:45,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300454485] [2021-06-05 05:48:45,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300454485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:45,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127047674] [2021-06-05 05:48:45,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:45,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:48:45,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:45,136 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:48:45,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:45,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:45,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:45,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:45,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:45,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:45,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:48:45,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:45,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:45,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:45,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:48:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:45,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127047674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:45,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:45,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:48:45,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101579574] [2021-06-05 05:48:45,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:48:45,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:45,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:48:45,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:48:45,628 INFO L87 Difference]: Start difference. First operand 1659 states and 3372 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:46,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:46,958 INFO L93 Difference]: Finished difference Result 1821 states and 3675 transitions. [2021-06-05 05:48:46,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:48:46,958 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:48:46,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:46,959 INFO L225 Difference]: With dead ends: 1821 [2021-06-05 05:48:46,959 INFO L226 Difference]: Without dead ends: 1773 [2021-06-05 05:48:46,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1285.9ms TimeCoverageRelationStatistics Valid=277, Invalid=3145, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:48:46,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2021-06-05 05:48:46,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1660. [2021-06-05 05:48:46,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1659 states have (on average 2.0337552742616034) internal successors, (3374), 1659 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:46,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 3374 transitions. [2021-06-05 05:48:46,972 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 3374 transitions. Word has length 40 [2021-06-05 05:48:46,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:46,972 INFO L482 AbstractCegarLoop]: Abstraction has 1660 states and 3374 transitions. [2021-06-05 05:48:46,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:46,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 3374 transitions. [2021-06-05 05:48:46,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:48:46,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:46,973 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:47,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 05:48:47,174 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:47,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:47,174 INFO L82 PathProgramCache]: Analyzing trace with hash 170979867, now seen corresponding path program 165 times [2021-06-05 05:48:47,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:47,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678627454] [2021-06-05 05:48:47,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:47,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:47,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678627454] [2021-06-05 05:48:47,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678627454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:47,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651130694] [2021-06-05 05:48:47,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:47,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:48:47,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:47,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:48:47,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:47,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:47,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:47,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:47,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:47,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:47,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:47,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:48:47,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:47,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:47,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:47,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:48:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:48,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651130694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:48,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:48,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:48:48,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180338194] [2021-06-05 05:48:48,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:48:48,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:48,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:48:48,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:48:48,044 INFO L87 Difference]: Start difference. First operand 1660 states and 3374 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:49,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:49,745 INFO L93 Difference]: Finished difference Result 1879 states and 3796 transitions. [2021-06-05 05:48:49,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:48:49,745 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:48:49,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:49,747 INFO L225 Difference]: With dead ends: 1879 [2021-06-05 05:48:49,747 INFO L226 Difference]: Without dead ends: 1831 [2021-06-05 05:48:49,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1453.4ms TimeCoverageRelationStatistics Valid=308, Invalid=3598, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:48:49,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-06-05 05:48:49,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1664. [2021-06-05 05:48:49,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 2.0336740829825617) internal successors, (3382), 1663 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:49,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 3382 transitions. [2021-06-05 05:48:49,759 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 3382 transitions. Word has length 40 [2021-06-05 05:48:49,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:49,759 INFO L482 AbstractCegarLoop]: Abstraction has 1664 states and 3382 transitions. [2021-06-05 05:48:49,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:49,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 3382 transitions. [2021-06-05 05:48:49,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:48:49,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:49,761 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:49,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:49,961 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:49,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:49,961 INFO L82 PathProgramCache]: Analyzing trace with hash -470130723, now seen corresponding path program 166 times [2021-06-05 05:48:49,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:49,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472582506] [2021-06-05 05:48:49,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:50,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:50,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472582506] [2021-06-05 05:48:50,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472582506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:50,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266103763] [2021-06-05 05:48:50,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:50,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:48:50,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:50,303 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:48:50,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:50,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:50,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:50,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:50,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:50,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:48:50,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:50,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:50,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:50,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:48:50,787 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:50,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266103763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:50,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:50,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:48:50,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838377331] [2021-06-05 05:48:50,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:48:50,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:50,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:48:50,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:48:50,788 INFO L87 Difference]: Start difference. First operand 1664 states and 3382 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:52,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:52,293 INFO L93 Difference]: Finished difference Result 1901 states and 3843 transitions. [2021-06-05 05:48:52,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:48:52,293 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:48:52,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:52,294 INFO L225 Difference]: With dead ends: 1901 [2021-06-05 05:48:52,294 INFO L226 Difference]: Without dead ends: 1869 [2021-06-05 05:48:52,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1396.6ms TimeCoverageRelationStatistics Valid=318, Invalid=3588, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:48:52,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-06-05 05:48:52,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1665. [2021-06-05 05:48:52,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1664 states have (on average 2.0336538461538463) internal successors, (3384), 1664 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:52,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 3384 transitions. [2021-06-05 05:48:52,307 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 3384 transitions. Word has length 40 [2021-06-05 05:48:52,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:52,307 INFO L482 AbstractCegarLoop]: Abstraction has 1665 states and 3384 transitions. [2021-06-05 05:48:52,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:52,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 3384 transitions. [2021-06-05 05:48:52,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:48:52,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:52,308 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:52,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 05:48:52,509 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:52,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:52,509 INFO L82 PathProgramCache]: Analyzing trace with hash 956111643, now seen corresponding path program 167 times [2021-06-05 05:48:52,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:52,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141029629] [2021-06-05 05:48:52,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:52,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:52,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141029629] [2021-06-05 05:48:52,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141029629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:52,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313339288] [2021-06-05 05:48:52,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:52,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:48:52,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:52,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:48:52,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:53,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:53,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:53,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:53,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:53,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:48:53,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:53,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:53,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:53,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:48:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:53,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313339288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:53,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:53,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:48:53,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66713344] [2021-06-05 05:48:53,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:48:53,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:53,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:48:53,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:48:53,316 INFO L87 Difference]: Start difference. First operand 1665 states and 3384 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:55,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:55,169 INFO L93 Difference]: Finished difference Result 1968 states and 3978 transitions. [2021-06-05 05:48:55,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:48:55,169 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:48:55,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:55,171 INFO L225 Difference]: With dead ends: 1968 [2021-06-05 05:48:55,171 INFO L226 Difference]: Without dead ends: 1924 [2021-06-05 05:48:55,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1557.7ms TimeCoverageRelationStatistics Valid=382, Invalid=4448, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:48:55,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2021-06-05 05:48:55,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1662. [2021-06-05 05:48:55,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 2.03371462974112) internal successors, (3378), 1661 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:55,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 3378 transitions. [2021-06-05 05:48:55,183 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 3378 transitions. Word has length 40 [2021-06-05 05:48:55,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:55,184 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 3378 transitions. [2021-06-05 05:48:55,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:55,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 3378 transitions. [2021-06-05 05:48:55,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:48:55,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:55,185 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:55,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:55,385 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:55,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:55,386 INFO L82 PathProgramCache]: Analyzing trace with hash 931216087, now seen corresponding path program 168 times [2021-06-05 05:48:55,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:55,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748706635] [2021-06-05 05:48:55,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:55,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:55,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748706635] [2021-06-05 05:48:55,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748706635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:55,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467647574] [2021-06-05 05:48:55,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:55,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:48:55,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:55,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:48:55,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:56,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:56,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:48:56,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:56,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:56,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:56,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:16 [2021-06-05 05:48:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:56,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467647574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:56,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:56,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:48:56,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190601560] [2021-06-05 05:48:56,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:48:56,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:56,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:48:56,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:48:56,201 INFO L87 Difference]: Start difference. First operand 1662 states and 3378 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:57,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:57,536 INFO L93 Difference]: Finished difference Result 1796 states and 3627 transitions. [2021-06-05 05:48:57,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:48:57,536 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:48:57,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:57,538 INFO L225 Difference]: With dead ends: 1796 [2021-06-05 05:48:57,538 INFO L226 Difference]: Without dead ends: 1768 [2021-06-05 05:48:57,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1253.6ms TimeCoverageRelationStatistics Valid=257, Invalid=3165, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:48:57,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-06-05 05:48:57,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1655. [2021-06-05 05:48:57,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1654 states have (on average 2.033857315598549) internal successors, (3364), 1654 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:57,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 3364 transitions. [2021-06-05 05:48:57,551 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 3364 transitions. Word has length 40 [2021-06-05 05:48:57,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:57,551 INFO L482 AbstractCegarLoop]: Abstraction has 1655 states and 3364 transitions. [2021-06-05 05:48:57,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:57,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 3364 transitions. [2021-06-05 05:48:57,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:48:57,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:57,552 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:57,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:57,753 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:57,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:57,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1074502817, now seen corresponding path program 169 times [2021-06-05 05:48:57,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:57,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591501158] [2021-06-05 05:48:57,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:58,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:58,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591501158] [2021-06-05 05:48:58,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591501158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:58,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606028821] [2021-06-05 05:48:58,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:58,103 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:48:58,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:58,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:58,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:48:58,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:58,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:58,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:58,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:48:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:58,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606028821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:58,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:58,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:48:58,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827967250] [2021-06-05 05:48:58,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:48:58,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:58,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:48:58,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1233, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:48:58,608 INFO L87 Difference]: Start difference. First operand 1655 states and 3364 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:00,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:00,182 INFO L93 Difference]: Finished difference Result 1816 states and 3662 transitions. [2021-06-05 05:49:00,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:49:00,182 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:49:00,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:00,184 INFO L225 Difference]: With dead ends: 1816 [2021-06-05 05:49:00,184 INFO L226 Difference]: Without dead ends: 1756 [2021-06-05 05:49:00,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1391.6ms TimeCoverageRelationStatistics Valid=262, Invalid=3278, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:49:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-06-05 05:49:00,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1664. [2021-06-05 05:49:00,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 2.0336740829825617) internal successors, (3382), 1663 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:00,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 3382 transitions. [2021-06-05 05:49:00,196 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 3382 transitions. Word has length 40 [2021-06-05 05:49:00,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:00,196 INFO L482 AbstractCegarLoop]: Abstraction has 1664 states and 3382 transitions. [2021-06-05 05:49:00,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:00,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 3382 transitions. [2021-06-05 05:49:00,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:49:00,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:00,197 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:00,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:00,397 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:00,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:00,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1746067423, now seen corresponding path program 170 times [2021-06-05 05:49:00,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:00,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929706393] [2021-06-05 05:49:00,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:00,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:00,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929706393] [2021-06-05 05:49:00,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929706393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:00,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617675048] [2021-06-05 05:49:00,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:49:00,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:49:00,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:00,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:49:00,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:01,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:01,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:49:01,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:01,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:01,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:01,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:49:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:01,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617675048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:01,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:01,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:49:01,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842533356] [2021-06-05 05:49:01,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:49:01,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:01,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:49:01,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:49:01,293 INFO L87 Difference]: Start difference. First operand 1664 states and 3382 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:03,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:03,070 INFO L93 Difference]: Finished difference Result 1832 states and 3697 transitions. [2021-06-05 05:49:03,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:49:03,071 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:49:03,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:03,072 INFO L225 Difference]: With dead ends: 1832 [2021-06-05 05:49:03,072 INFO L226 Difference]: Without dead ends: 1784 [2021-06-05 05:49:03,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1518.8ms TimeCoverageRelationStatistics Valid=316, Invalid=3590, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:49:03,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-05 05:49:03,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1666. [2021-06-05 05:49:03,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 2.0336336336336336) internal successors, (3386), 1665 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 3386 transitions. [2021-06-05 05:49:03,085 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 3386 transitions. Word has length 40 [2021-06-05 05:49:03,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:03,085 INFO L482 AbstractCegarLoop]: Abstraction has 1666 states and 3386 transitions. [2021-06-05 05:49:03,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:03,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 3386 transitions. [2021-06-05 05:49:03,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:49:03,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:03,086 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:03,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-05 05:49:03,287 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:03,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:03,287 INFO L82 PathProgramCache]: Analyzing trace with hash -360444833, now seen corresponding path program 171 times [2021-06-05 05:49:03,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:03,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865529611] [2021-06-05 05:49:03,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:03,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:03,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865529611] [2021-06-05 05:49:03,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865529611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:03,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856588385] [2021-06-05 05:49:03,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:03,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:49:03,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:03,672 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:49:03,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:04,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:04,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:04,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:04,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:04,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:04,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:49:04,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:04,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:04,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:04,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:49:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:04,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856588385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:04,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:04,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 40 [2021-06-05 05:49:04,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744003367] [2021-06-05 05:49:04,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 05:49:04,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:04,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 05:49:04,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1504, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:49:04,313 INFO L87 Difference]: Start difference. First operand 1666 states and 3386 transitions. Second operand has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:06,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:06,310 INFO L93 Difference]: Finished difference Result 1885 states and 3808 transitions. [2021-06-05 05:49:06,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:49:06,311 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:49:06,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:06,312 INFO L225 Difference]: With dead ends: 1885 [2021-06-05 05:49:06,312 INFO L226 Difference]: Without dead ends: 1841 [2021-06-05 05:49:06,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1672.3ms TimeCoverageRelationStatistics Valid=369, Invalid=4323, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:49:06,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-06-05 05:49:06,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1669. [2021-06-05 05:49:06,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 2.0335731414868103) internal successors, (3392), 1668 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:06,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 3392 transitions. [2021-06-05 05:49:06,324 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 3392 transitions. Word has length 40 [2021-06-05 05:49:06,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:06,325 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 3392 transitions. [2021-06-05 05:49:06,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:06,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 3392 transitions. [2021-06-05 05:49:06,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:49:06,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:06,326 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:06,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 05:49:06,526 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:06,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:06,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1001555423, now seen corresponding path program 172 times [2021-06-05 05:49:06,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:06,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756444365] [2021-06-05 05:49:06,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:06,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:06,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756444365] [2021-06-05 05:49:06,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756444365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:06,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729042104] [2021-06-05 05:49:06,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:06,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:49:06,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:06,878 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:49:06,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:07,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:07,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:07,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:07,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:07,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:49:07,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:07,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:07,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:07,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:49:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:07,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729042104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:07,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:07,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:49:07,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145491948] [2021-06-05 05:49:07,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:49:07,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:07,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:49:07,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:49:07,353 INFO L87 Difference]: Start difference. First operand 1669 states and 3392 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:09,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:09,025 INFO L93 Difference]: Finished difference Result 1920 states and 3881 transitions. [2021-06-05 05:49:09,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:49:09,025 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:49:09,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:09,027 INFO L225 Difference]: With dead ends: 1920 [2021-06-05 05:49:09,027 INFO L226 Difference]: Without dead ends: 1888 [2021-06-05 05:49:09,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 1490.2ms TimeCoverageRelationStatistics Valid=368, Invalid=3922, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:49:09,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-06-05 05:49:09,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1670. [2021-06-05 05:49:09,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 2.0335530257639305) internal successors, (3394), 1669 states have internal predecessors, (3394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:09,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 3394 transitions. [2021-06-05 05:49:09,039 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 3394 transitions. Word has length 40 [2021-06-05 05:49:09,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:09,039 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 3394 transitions. [2021-06-05 05:49:09,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:09,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 3394 transitions. [2021-06-05 05:49:09,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:49:09,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:09,041 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:09,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 05:49:09,241 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:09,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:09,241 INFO L82 PathProgramCache]: Analyzing trace with hash 424686943, now seen corresponding path program 173 times [2021-06-05 05:49:09,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:09,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812478533] [2021-06-05 05:49:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:09,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:09,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812478533] [2021-06-05 05:49:09,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812478533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:09,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171348883] [2021-06-05 05:49:09,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:09,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:49:09,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:09,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:49:09,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:09,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:09,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:09,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:09,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:09,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:49:09,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:09,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:09,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:09,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:49:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:10,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171348883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:10,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:10,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:49:10,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745714728] [2021-06-05 05:49:10,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:49:10,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:10,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:49:10,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:49:10,044 INFO L87 Difference]: Start difference. First operand 1670 states and 3394 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:12,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:12,283 INFO L93 Difference]: Finished difference Result 1996 states and 4031 transitions. [2021-06-05 05:49:12,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:49:12,284 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:49:12,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:12,285 INFO L225 Difference]: With dead ends: 1996 [2021-06-05 05:49:12,285 INFO L226 Difference]: Without dead ends: 1952 [2021-06-05 05:49:12,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 1752.2ms TimeCoverageRelationStatistics Valid=460, Invalid=5240, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 05:49:12,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1952 states. [2021-06-05 05:49:12,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1952 to 1666. [2021-06-05 05:49:12,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 2.0336336336336336) internal successors, (3386), 1665 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 3386 transitions. [2021-06-05 05:49:12,298 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 3386 transitions. Word has length 40 [2021-06-05 05:49:12,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:12,298 INFO L482 AbstractCegarLoop]: Abstraction has 1666 states and 3386 transitions. [2021-06-05 05:49:12,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:12,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 3386 transitions. [2021-06-05 05:49:12,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:49:12,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:12,300 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:12,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 05:49:12,500 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:12,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:12,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1990940629, now seen corresponding path program 174 times [2021-06-05 05:49:12,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:12,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346071362] [2021-06-05 05:49:12,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:12,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:12,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346071362] [2021-06-05 05:49:12,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346071362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:12,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964008976] [2021-06-05 05:49:12,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:12,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:49:12,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:12,841 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:49:12,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:13,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:13,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2021-06-05 05:49:13,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:13,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:13,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:13,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:28 [2021-06-05 05:49:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:13,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964008976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:13,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:13,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 40 [2021-06-05 05:49:13,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088711753] [2021-06-05 05:49:13,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 05:49:13,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:13,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 05:49:13,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1529, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:49:13,533 INFO L87 Difference]: Start difference. First operand 1666 states and 3386 transitions. Second operand has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:15,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:15,497 INFO L93 Difference]: Finished difference Result 1809 states and 3648 transitions. [2021-06-05 05:49:15,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:49:15,497 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:49:15,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:15,498 INFO L225 Difference]: With dead ends: 1809 [2021-06-05 05:49:15,498 INFO L226 Difference]: Without dead ends: 1767 [2021-06-05 05:49:15,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1799.5ms TimeCoverageRelationStatistics Valid=349, Invalid=4207, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:49:15,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-06-05 05:49:15,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1658. [2021-06-05 05:49:15,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 2.0337960168980085) internal successors, (3370), 1657 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:15,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 3370 transitions. [2021-06-05 05:49:15,511 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 3370 transitions. Word has length 40 [2021-06-05 05:49:15,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:15,511 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 3370 transitions. [2021-06-05 05:49:15,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:15,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 3370 transitions. [2021-06-05 05:49:15,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:49:15,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:15,512 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:15,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 05:49:15,713 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:15,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:15,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1204990365, now seen corresponding path program 175 times [2021-06-05 05:49:15,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:15,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987544821] [2021-06-05 05:49:15,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:16,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:16,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987544821] [2021-06-05 05:49:16,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987544821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:16,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706471442] [2021-06-05 05:49:16,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:16,067 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:49:16,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:16,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:16,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:16,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:16,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:16,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:16,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:16,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:49:16,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:16,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:16,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:16,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:49:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:16,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706471442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:16,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:16,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:49:16,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090345190] [2021-06-05 05:49:16,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:49:16,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:16,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:49:16,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:49:16,555 INFO L87 Difference]: Start difference. First operand 1658 states and 3370 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:17,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:17,905 INFO L93 Difference]: Finished difference Result 1800 states and 3631 transitions. [2021-06-05 05:49:17,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:49:17,905 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:49:17,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:17,907 INFO L225 Difference]: With dead ends: 1800 [2021-06-05 05:49:17,907 INFO L226 Difference]: Without dead ends: 1752 [2021-06-05 05:49:17,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1332.8ms TimeCoverageRelationStatistics Valid=279, Invalid=3261, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:49:17,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-06-05 05:49:17,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1661. [2021-06-05 05:49:17,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 2.0337349397590363) internal successors, (3376), 1660 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:17,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 3376 transitions. [2021-06-05 05:49:17,919 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 3376 transitions. Word has length 40 [2021-06-05 05:49:17,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:17,919 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 3376 transitions. [2021-06-05 05:49:17,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:17,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 3376 transitions. [2021-06-05 05:49:17,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:49:17,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:17,920 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:18,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:18,121 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:18,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1704354341, now seen corresponding path program 176 times [2021-06-05 05:49:18,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:18,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121370312] [2021-06-05 05:49:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:18,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:18,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121370312] [2021-06-05 05:49:18,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121370312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:18,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993849009] [2021-06-05 05:49:18,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:18,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:49:18,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:18,470 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:49:18,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:18,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:18,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:18,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:18,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:18,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:18,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:18,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:49:18,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:18,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:18,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:18,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:49:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:18,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993849009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:18,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:18,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:49:18,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922853359] [2021-06-05 05:49:18,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:49:18,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:18,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:49:18,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:49:18,951 INFO L87 Difference]: Start difference. First operand 1661 states and 3376 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:20,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:20,332 INFO L93 Difference]: Finished difference Result 1833 states and 3700 transitions. [2021-06-05 05:49:20,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:49:20,333 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:49:20,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:20,334 INFO L225 Difference]: With dead ends: 1833 [2021-06-05 05:49:20,334 INFO L226 Difference]: Without dead ends: 1789 [2021-06-05 05:49:20,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1368.3ms TimeCoverageRelationStatistics Valid=293, Invalid=3367, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:49:20,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2021-06-05 05:49:20,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1664. [2021-06-05 05:49:20,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 2.0336740829825617) internal successors, (3382), 1663 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:20,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 3382 transitions. [2021-06-05 05:49:20,347 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 3382 transitions. Word has length 40 [2021-06-05 05:49:20,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:20,347 INFO L482 AbstractCegarLoop]: Abstraction has 1664 states and 3382 transitions. [2021-06-05 05:49:20,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:20,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 3382 transitions. [2021-06-05 05:49:20,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:49:20,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:20,348 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:20,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 05:49:20,549 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:20,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:20,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1949502365, now seen corresponding path program 177 times [2021-06-05 05:49:20,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:20,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947243164] [2021-06-05 05:49:20,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:20,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:20,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947243164] [2021-06-05 05:49:20,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947243164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:20,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895528538] [2021-06-05 05:49:20,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:20,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:49:20,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:20,914 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:49:20,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:21,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:21,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:21,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:21,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:21,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:21,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:21,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:49:21,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:21,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:21,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:21,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:49:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:21,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895528538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:21,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:21,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:49:21,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830706811] [2021-06-05 05:49:21,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:49:21,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:21,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:49:21,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:49:21,477 INFO L87 Difference]: Start difference. First operand 1664 states and 3382 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:22,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:22,809 INFO L93 Difference]: Finished difference Result 1843 states and 3720 transitions. [2021-06-05 05:49:22,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:49:22,809 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:49:22,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:22,810 INFO L225 Difference]: With dead ends: 1843 [2021-06-05 05:49:22,810 INFO L226 Difference]: Without dead ends: 1811 [2021-06-05 05:49:22,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1501.7ms TimeCoverageRelationStatistics Valid=346, Invalid=3686, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:49:22,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2021-06-05 05:49:22,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1665. [2021-06-05 05:49:22,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1664 states have (on average 2.0336538461538463) internal successors, (3384), 1664 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:22,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 3384 transitions. [2021-06-05 05:49:22,823 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 3384 transitions. Word has length 40 [2021-06-05 05:49:22,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:22,823 INFO L482 AbstractCegarLoop]: Abstraction has 1665 states and 3384 transitions. [2021-06-05 05:49:22,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:22,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 3384 transitions. [2021-06-05 05:49:22,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:49:22,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:22,824 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:23,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:23,025 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:23,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:23,025 INFO L82 PathProgramCache]: Analyzing trace with hash -919222565, now seen corresponding path program 178 times [2021-06-05 05:49:23,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:23,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405763349] [2021-06-05 05:49:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:23,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:23,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405763349] [2021-06-05 05:49:23,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405763349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:23,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519972246] [2021-06-05 05:49:23,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:23,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:49:23,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:23,408 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:49:23,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:23,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:23,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:23,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:23,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:23,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:49:23,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:23,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:23,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:23,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:49:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:23,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519972246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:23,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:23,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:49:23,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517513847] [2021-06-05 05:49:23,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:49:23,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:23,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:49:23,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:49:23,870 INFO L87 Difference]: Start difference. First operand 1665 states and 3384 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:25,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:25,786 INFO L93 Difference]: Finished difference Result 1909 states and 3849 transitions. [2021-06-05 05:49:25,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:49:25,786 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:49:25,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:25,788 INFO L225 Difference]: With dead ends: 1909 [2021-06-05 05:49:25,788 INFO L226 Difference]: Without dead ends: 1853 [2021-06-05 05:49:25,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 1731.6ms TimeCoverageRelationStatistics Valid=468, Invalid=5082, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:49:25,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-06-05 05:49:25,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1667. [2021-06-05 05:49:25,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 2.033013205282113) internal successors, (3387), 1666 states have internal predecessors, (3387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:25,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 3387 transitions. [2021-06-05 05:49:25,801 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 3387 transitions. Word has length 40 [2021-06-05 05:49:25,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:25,801 INFO L482 AbstractCegarLoop]: Abstraction has 1667 states and 3387 transitions. [2021-06-05 05:49:25,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:25,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 3387 transitions. [2021-06-05 05:49:25,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:49:25,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:25,802 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:26,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-06-05 05:49:26,002 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:26,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:26,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1833855311, now seen corresponding path program 179 times [2021-06-05 05:49:26,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:26,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063353308] [2021-06-05 05:49:26,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:26,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:26,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063353308] [2021-06-05 05:49:26,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063353308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:26,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018512707] [2021-06-05 05:49:26,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:26,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:49:26,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:26,352 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 05:49:26,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:26,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:26,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:49:26,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:26,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:26,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:26,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:16 [2021-06-05 05:49:26,931 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:26,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018512707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:26,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:26,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 38 [2021-06-05 05:49:26,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124024877] [2021-06-05 05:49:26,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:49:26,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:26,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:49:26,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:49:26,932 INFO L87 Difference]: Start difference. First operand 1667 states and 3387 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:28,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:28,746 INFO L93 Difference]: Finished difference Result 1820 states and 3671 transitions. [2021-06-05 05:49:28,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:49:28,746 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:49:28,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:28,747 INFO L225 Difference]: With dead ends: 1820 [2021-06-05 05:49:28,747 INFO L226 Difference]: Without dead ends: 1792 [2021-06-05 05:49:28,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1522.5ms TimeCoverageRelationStatistics Valid=336, Invalid=4220, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:49:28,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-06-05 05:49:28,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1656. [2021-06-05 05:49:28,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 2.033836858006042) internal successors, (3366), 1655 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:28,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 3366 transitions. [2021-06-05 05:49:28,759 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 3366 transitions. Word has length 40 [2021-06-05 05:49:28,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:28,759 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 3366 transitions. [2021-06-05 05:49:28,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:28,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 3366 transitions. [2021-06-05 05:49:28,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:49:28,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:28,761 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:28,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:28,961 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:28,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:28,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1720310829, now seen corresponding path program 180 times [2021-06-05 05:49:28,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:28,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686765239] [2021-06-05 05:49:28,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:29,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:29,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686765239] [2021-06-05 05:49:29,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686765239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:29,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276178269] [2021-06-05 05:49:29,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:29,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:49:29,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:29,335 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:49:29,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:29,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:29,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:29,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:29,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:29,985 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-06-05 05:49:29,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 26 [2021-06-05 05:49:29,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:29,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:30,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:30,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:66, output treesize:25 [2021-06-05 05:49:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:30,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276178269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:30,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:30,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 40 [2021-06-05 05:49:30,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326106505] [2021-06-05 05:49:30,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 05:49:30,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:30,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 05:49:30,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:49:30,189 INFO L87 Difference]: Start difference. First operand 1656 states and 3366 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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) [2021-06-05 05:49:33,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:33,474 INFO L93 Difference]: Finished difference Result 1886 states and 3775 transitions. [2021-06-05 05:49:33,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:49:33,474 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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 40 [2021-06-05 05:49:33,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:33,476 INFO L225 Difference]: With dead ends: 1886 [2021-06-05 05:49:33,476 INFO L226 Difference]: Without dead ends: 1755 [2021-06-05 05:49:33,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 2796.6ms TimeCoverageRelationStatistics Valid=452, Invalid=6520, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 05:49:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2021-06-05 05:49:33,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 1668. [2021-06-05 05:49:33,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1667 states have (on average 2.033593281343731) internal successors, (3390), 1667 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:33,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 3390 transitions. [2021-06-05 05:49:33,489 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 3390 transitions. Word has length 40 [2021-06-05 05:49:33,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:33,489 INFO L482 AbstractCegarLoop]: Abstraction has 1668 states and 3390 transitions. [2021-06-05 05:49:33,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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) [2021-06-05 05:49:33,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 3390 transitions. [2021-06-05 05:49:33,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:49:33,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:33,490 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:33,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 05:49:33,691 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:33,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:33,692 INFO L82 PathProgramCache]: Analyzing trace with hash 896081045, now seen corresponding path program 181 times [2021-06-05 05:49:33,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:33,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803253778] [2021-06-05 05:49:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:34,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:34,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803253778] [2021-06-05 05:49:34,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803253778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:34,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310353422] [2021-06-05 05:49:34,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:34,044 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:49:34,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:34,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:34,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:34,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:34,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:34,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:34,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:34,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:49:34,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:34,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:34,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:34,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:49:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:34,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310353422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:34,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:34,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:49:34,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114269459] [2021-06-05 05:49:34,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:49:34,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:34,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:49:34,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:49:34,552 INFO L87 Difference]: Start difference. First operand 1668 states and 3390 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:35,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:35,952 INFO L93 Difference]: Finished difference Result 1815 states and 3656 transitions. [2021-06-05 05:49:35,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:49:35,952 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:49:35,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:35,953 INFO L225 Difference]: With dead ends: 1815 [2021-06-05 05:49:35,953 INFO L226 Difference]: Without dead ends: 1751 [2021-06-05 05:49:35,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1195.3ms TimeCoverageRelationStatistics Valid=225, Invalid=2855, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:49:35,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2021-06-05 05:49:35,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1669. [2021-06-05 05:49:35,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 2.0335731414868103) internal successors, (3392), 1668 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:35,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 3392 transitions. [2021-06-05 05:49:35,966 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 3392 transitions. Word has length 40 [2021-06-05 05:49:35,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:35,966 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 3392 transitions. [2021-06-05 05:49:35,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:35,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 3392 transitions. [2021-06-05 05:49:35,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:49:35,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:35,967 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:36,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:36,168 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:36,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:36,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1309915603, now seen corresponding path program 182 times [2021-06-05 05:49:36,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:36,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356204971] [2021-06-05 05:49:36,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:36,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:36,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356204971] [2021-06-05 05:49:36,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356204971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:36,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874351987] [2021-06-05 05:49:36,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:36,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:49:36,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:36,526 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:49:36,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:36,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:36,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:36,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:36,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:36,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:36,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:36,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:49:36,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:36,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:36,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:36,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:49:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:37,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874351987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:37,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:37,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:49:37,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633124747] [2021-06-05 05:49:37,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:49:37,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:37,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:49:37,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:49:37,061 INFO L87 Difference]: Start difference. First operand 1669 states and 3392 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:38,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:38,421 INFO L93 Difference]: Finished difference Result 1847 states and 3724 transitions. [2021-06-05 05:49:38,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:49:38,421 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:49:38,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:38,423 INFO L225 Difference]: With dead ends: 1847 [2021-06-05 05:49:38,423 INFO L226 Difference]: Without dead ends: 1783 [2021-06-05 05:49:38,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1318.3ms TimeCoverageRelationStatistics Valid=237, Invalid=3069, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:49:38,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2021-06-05 05:49:38,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1673. [2021-06-05 05:49:38,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 2.0334928229665072) internal successors, (3400), 1672 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:38,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 3400 transitions. [2021-06-05 05:49:38,437 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 3400 transitions. Word has length 40 [2021-06-05 05:49:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:38,437 INFO L482 AbstractCegarLoop]: Abstraction has 1673 states and 3400 transitions. [2021-06-05 05:49:38,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 3400 transitions. [2021-06-05 05:49:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:49:38,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:38,438 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:38,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:38,653 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:38,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:38,653 INFO L82 PathProgramCache]: Analyzing trace with hash 638350997, now seen corresponding path program 183 times [2021-06-05 05:49:38,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:38,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776056275] [2021-06-05 05:49:38,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:39,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:39,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776056275] [2021-06-05 05:49:39,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776056275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:39,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383657480] [2021-06-05 05:49:39,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:39,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:49:39,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:39,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:49:39,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:39,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:39,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:39,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:39,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:39,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:49:39,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:39,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:39,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:39,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:49:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:39,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383657480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:39,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:39,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:49:39,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970507417] [2021-06-05 05:49:39,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:49:39,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:39,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:49:39,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:49:39,599 INFO L87 Difference]: Start difference. First operand 1673 states and 3400 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:41,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:41,012 INFO L93 Difference]: Finished difference Result 1877 states and 3788 transitions. [2021-06-05 05:49:41,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:49:41,012 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:49:41,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:41,014 INFO L225 Difference]: With dead ends: 1877 [2021-06-05 05:49:41,014 INFO L226 Difference]: Without dead ends: 1829 [2021-06-05 05:49:41,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1335.2ms TimeCoverageRelationStatistics Valid=246, Invalid=3060, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:49:41,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-06-05 05:49:41,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1674. [2021-06-05 05:49:41,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 2.0334728033472804) internal successors, (3402), 1673 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:41,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 3402 transitions. [2021-06-05 05:49:41,026 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 3402 transitions. Word has length 40 [2021-06-05 05:49:41,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:41,026 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 3402 transitions. [2021-06-05 05:49:41,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:41,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 3402 transitions. [2021-06-05 05:49:41,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:49:41,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:41,027 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:41,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 05:49:41,228 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:41,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:41,228 INFO L82 PathProgramCache]: Analyzing trace with hash 2023973587, now seen corresponding path program 184 times [2021-06-05 05:49:41,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:41,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950359207] [2021-06-05 05:49:41,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:41,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:41,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950359207] [2021-06-05 05:49:41,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950359207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:41,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163665004] [2021-06-05 05:49:41,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:41,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:49:41,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:41,602 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:49:41,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:41,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:41,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:49:41,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:41,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:41,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:41,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:49:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:42,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163665004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:42,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:42,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:49:42,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264520639] [2021-06-05 05:49:42,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:49:42,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:42,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:49:42,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:49:42,117 INFO L87 Difference]: Start difference. First operand 1674 states and 3402 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:43,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:43,776 INFO L93 Difference]: Finished difference Result 1931 states and 3899 transitions. [2021-06-05 05:49:43,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:49:43,776 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:49:43,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:43,778 INFO L225 Difference]: With dead ends: 1931 [2021-06-05 05:49:43,778 INFO L226 Difference]: Without dead ends: 1871 [2021-06-05 05:49:43,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1514.6ms TimeCoverageRelationStatistics Valid=287, Invalid=3619, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:49:43,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-06-05 05:49:43,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1681. [2021-06-05 05:49:43,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1681 states, 1680 states have (on average 2.033333333333333) internal successors, (3416), 1680 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:43,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1681 states to 1681 states and 3416 transitions. [2021-06-05 05:49:43,791 INFO L78 Accepts]: Start accepts. Automaton has 1681 states and 3416 transitions. Word has length 40 [2021-06-05 05:49:43,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:43,791 INFO L482 AbstractCegarLoop]: Abstraction has 1681 states and 3416 transitions. [2021-06-05 05:49:43,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1681 states and 3416 transitions. [2021-06-05 05:49:43,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:49:43,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:43,793 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:44,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:44,001 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:44,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:44,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1382862997, now seen corresponding path program 185 times [2021-06-05 05:49:44,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:44,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774791041] [2021-06-05 05:49:44,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:44,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:44,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774791041] [2021-06-05 05:49:44,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774791041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:44,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923465047] [2021-06-05 05:49:44,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:44,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:49:44,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:44,436 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:49:44,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:44,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:44,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:44,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:44,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:44,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:44,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-06-05 05:49:44,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:44,811 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-06-05 05:49:44,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:44,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:13 [2021-06-05 05:49:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:45,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923465047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:45,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:45,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 38 [2021-06-05 05:49:45,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016831607] [2021-06-05 05:49:45,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:49:45,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:45,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:49:45,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:49:45,029 INFO L87 Difference]: Start difference. First operand 1681 states and 3416 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:47,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:47,619 INFO L93 Difference]: Finished difference Result 2209 states and 4431 transitions. [2021-06-05 05:49:47,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:49:47,619 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:49:47,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:47,620 INFO L225 Difference]: With dead ends: 2209 [2021-06-05 05:49:47,620 INFO L226 Difference]: Without dead ends: 2124 [2021-06-05 05:49:47,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 2193.6ms TimeCoverageRelationStatistics Valid=513, Invalid=6293, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 05:49:47,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2021-06-05 05:49:47,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1708. [2021-06-05 05:49:47,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 2.0374926772114823) internal successors, (3478), 1707 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:47,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 3478 transitions. [2021-06-05 05:49:47,633 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 3478 transitions. Word has length 40 [2021-06-05 05:49:47,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:47,633 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 3478 transitions. [2021-06-05 05:49:47,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:47,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 3478 transitions. [2021-06-05 05:49:47,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:49:47,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:47,635 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:47,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2021-06-05 05:49:47,841 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:47,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:47,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1485861933, now seen corresponding path program 186 times [2021-06-05 05:49:47,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:47,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130516883] [2021-06-05 05:49:47,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:48,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:48,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130516883] [2021-06-05 05:49:48,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130516883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:48,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119063152] [2021-06-05 05:49:48,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:48,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:49:48,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:48,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:49:48,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:48,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:48,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:49:48,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:48,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:48,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:48,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:49:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:48,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119063152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:48,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:48,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:49:48,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232762576] [2021-06-05 05:49:48,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:49:48,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:48,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:49:48,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:49:48,700 INFO L87 Difference]: Start difference. First operand 1708 states and 3478 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:50,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:50,630 INFO L93 Difference]: Finished difference Result 2036 states and 4122 transitions. [2021-06-05 05:49:50,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:49:50,631 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:49:50,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:50,632 INFO L225 Difference]: With dead ends: 2036 [2021-06-05 05:49:50,632 INFO L226 Difference]: Without dead ends: 1992 [2021-06-05 05:49:50,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 1585.1ms TimeCoverageRelationStatistics Valid=348, Invalid=4344, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:49:50,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-06-05 05:49:50,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1703. [2021-06-05 05:49:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 2.0376028202115157) internal successors, (3468), 1702 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) [2021-06-05 05:49:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 3468 transitions. [2021-06-05 05:49:50,645 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 3468 transitions. Word has length 40 [2021-06-05 05:49:50,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:50,646 INFO L482 AbstractCegarLoop]: Abstraction has 1703 states and 3468 transitions. [2021-06-05 05:49:50,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:50,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 3468 transitions. [2021-06-05 05:49:50,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:49:50,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:50,647 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:50,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:50,849 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:50,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:50,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1947693497, now seen corresponding path program 187 times [2021-06-05 05:49:50,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:50,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868051590] [2021-06-05 05:49:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:51,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:51,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868051590] [2021-06-05 05:49:51,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868051590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:51,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255299144] [2021-06-05 05:49:51,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:51,203 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:49:51,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:51,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:51,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:51,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:51,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:51,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:49:51,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:51,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:51,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:51,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-06-05 05:49:51,701 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:51,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255299144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:51,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:51,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:49:51,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925685790] [2021-06-05 05:49:51,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:49:51,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:51,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:49:51,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:49:51,702 INFO L87 Difference]: Start difference. First operand 1703 states and 3468 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:52,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:52,868 INFO L93 Difference]: Finished difference Result 1908 states and 3862 transitions. [2021-06-05 05:49:52,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:49:52,868 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:49:52,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:52,870 INFO L225 Difference]: With dead ends: 1908 [2021-06-05 05:49:52,870 INFO L226 Difference]: Without dead ends: 1880 [2021-06-05 05:49:52,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1240.7ms TimeCoverageRelationStatistics Valid=238, Invalid=3068, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:49:52,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-06-05 05:49:52,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1698. [2021-06-05 05:49:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 2.037713612256924) internal successors, (3458), 1697 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 3458 transitions. [2021-06-05 05:49:52,883 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 3458 transitions. Word has length 40 [2021-06-05 05:49:52,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:52,883 INFO L482 AbstractCegarLoop]: Abstraction has 1698 states and 3458 transitions. [2021-06-05 05:49:52,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:52,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 3458 transitions. [2021-06-05 05:49:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:49:52,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:52,884 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:53,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:53,084 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:53,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:53,085 INFO L82 PathProgramCache]: Analyzing trace with hash -752658799, now seen corresponding path program 188 times [2021-06-05 05:49:53,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:53,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026737694] [2021-06-05 05:49:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:53,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:53,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026737694] [2021-06-05 05:49:53,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026737694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:53,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213396585] [2021-06-05 05:49:53,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:49:53,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:49:53,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:53,482 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:49:53,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:53,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:53,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:53,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:53,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:53,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:53,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:53,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:49:53,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:53,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:53,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:53,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:49:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:53,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213396585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:53,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:53,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:49:53,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818815375] [2021-06-05 05:49:53,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:49:53,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:53,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:49:53,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:49:53,986 INFO L87 Difference]: Start difference. First operand 1698 states and 3458 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:55,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:55,124 INFO L93 Difference]: Finished difference Result 1843 states and 3720 transitions. [2021-06-05 05:49:55,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:49:55,125 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:49:55,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:55,126 INFO L225 Difference]: With dead ends: 1843 [2021-06-05 05:49:55,126 INFO L226 Difference]: Without dead ends: 1779 [2021-06-05 05:49:55,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1240.6ms TimeCoverageRelationStatistics Valid=233, Invalid=2847, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:49:55,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2021-06-05 05:49:55,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1701. [2021-06-05 05:49:55,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 2.0376470588235294) internal successors, (3464), 1700 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:55,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 3464 transitions. [2021-06-05 05:49:55,139 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 3464 transitions. Word has length 40 [2021-06-05 05:49:55,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:55,139 INFO L482 AbstractCegarLoop]: Abstraction has 1701 states and 3464 transitions. [2021-06-05 05:49:55,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:55,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 3464 transitions. [2021-06-05 05:49:55,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:49:55,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:55,140 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:55,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 05:49:55,341 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:55,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:55,341 INFO L82 PathProgramCache]: Analyzing trace with hash -338824241, now seen corresponding path program 189 times [2021-06-05 05:49:55,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:55,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645439006] [2021-06-05 05:49:55,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:55,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:55,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645439006] [2021-06-05 05:49:55,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645439006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:55,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709198030] [2021-06-05 05:49:55,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:55,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:49:55,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:55,693 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:49:55,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:56,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:56,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:56,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:56,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:56,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:56,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:49:56,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:56,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:56,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:56,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:49:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:56,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709198030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:56,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:56,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-06-05 05:49:56,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151656544] [2021-06-05 05:49:56,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:49:56,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:56,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:49:56,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1293, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:49:56,207 INFO L87 Difference]: Start difference. First operand 1701 states and 3464 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:58,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:58,080 INFO L93 Difference]: Finished difference Result 1973 states and 3965 transitions. [2021-06-05 05:49:58,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:49:58,080 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:49:58,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:58,082 INFO L225 Difference]: With dead ends: 1973 [2021-06-05 05:49:58,082 INFO L226 Difference]: Without dead ends: 1853 [2021-06-05 05:49:58,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 1718.4ms TimeCoverageRelationStatistics Valid=369, Invalid=4601, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:49:58,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-06-05 05:49:58,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1716. [2021-06-05 05:49:58,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 2.0379008746355685) internal successors, (3495), 1715 states have internal predecessors, (3495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:58,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 3495 transitions. [2021-06-05 05:49:58,096 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 3495 transitions. Word has length 40 [2021-06-05 05:49:58,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:58,096 INFO L482 AbstractCegarLoop]: Abstraction has 1716 states and 3495 transitions. [2021-06-05 05:49:58,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:58,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 3495 transitions. [2021-06-05 05:49:58,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:49:58,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:58,098 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:58,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 05:49:58,298 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:58,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:58,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1010388847, now seen corresponding path program 190 times [2021-06-05 05:49:58,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:58,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652460408] [2021-06-05 05:49:58,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:58,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:58,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652460408] [2021-06-05 05:49:58,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652460408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:58,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328991601] [2021-06-05 05:49:58,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:58,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:49:58,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:58,642 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:49:58,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:59,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:59,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:59,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:59,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:59,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:59,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:59,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:49:59,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:59,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:59,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:59,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:49:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:59,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328991601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:59,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:59,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:49:59,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808904899] [2021-06-05 05:49:59,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:49:59,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:59,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:49:59,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:49:59,155 INFO L87 Difference]: Start difference. First operand 1716 states and 3495 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:01,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:01,122 INFO L93 Difference]: Finished difference Result 1993 states and 4005 transitions. [2021-06-05 05:50:01,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:50:01,122 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:50:01,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:01,123 INFO L225 Difference]: With dead ends: 1993 [2021-06-05 05:50:01,123 INFO L226 Difference]: Without dead ends: 1897 [2021-06-05 05:50:01,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1664.4ms TimeCoverageRelationStatistics Valid=392, Invalid=4438, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:50:01,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1897 states. [2021-06-05 05:50:01,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1897 to 1717. [2021-06-05 05:50:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 2.037878787878788) internal successors, (3497), 1716 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:01,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 3497 transitions. [2021-06-05 05:50:01,136 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 3497 transitions. Word has length 40 [2021-06-05 05:50:01,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:01,136 INFO L482 AbstractCegarLoop]: Abstraction has 1717 states and 3497 transitions. [2021-06-05 05:50:01,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:01,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 3497 transitions. [2021-06-05 05:50:01,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:50:01,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:01,138 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:01,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 05:50:01,338 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:01,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:01,338 INFO L82 PathProgramCache]: Analyzing trace with hash 375233743, now seen corresponding path program 191 times [2021-06-05 05:50:01,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:01,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394196113] [2021-06-05 05:50:01,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:01,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:01,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394196113] [2021-06-05 05:50:01,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394196113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:01,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177633748] [2021-06-05 05:50:01,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:01,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:50:01,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:01,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:50:01,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:02,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:02,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:50:02,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:02,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:02,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:02,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:50:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:02,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177633748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:02,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:02,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:50:02,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424325192] [2021-06-05 05:50:02,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:50:02,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:02,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:50:02,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:50:02,193 INFO L87 Difference]: Start difference. First operand 1717 states and 3497 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:04,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:04,581 INFO L93 Difference]: Finished difference Result 2085 states and 4199 transitions. [2021-06-05 05:50:04,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:50:04,581 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:50:04,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:04,583 INFO L225 Difference]: With dead ends: 2085 [2021-06-05 05:50:04,583 INFO L226 Difference]: Without dead ends: 1993 [2021-06-05 05:50:04,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 1994.1ms TimeCoverageRelationStatistics Valid=443, Invalid=5107, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:50:04,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-06-05 05:50:04,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1729. [2021-06-05 05:50:04,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 2.0399305555555554) internal successors, (3525), 1728 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 3525 transitions. [2021-06-05 05:50:04,596 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 3525 transitions. Word has length 40 [2021-06-05 05:50:04,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:04,596 INFO L482 AbstractCegarLoop]: Abstraction has 1729 states and 3525 transitions. [2021-06-05 05:50:04,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:04,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 3525 transitions. [2021-06-05 05:50:04,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:50:04,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:04,597 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:04,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 05:50:04,798 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:04,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:04,798 INFO L82 PathProgramCache]: Analyzing trace with hash -265876847, now seen corresponding path program 192 times [2021-06-05 05:50:04,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:04,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741681081] [2021-06-05 05:50:04,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:05,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:05,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741681081] [2021-06-05 05:50:05,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741681081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:05,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376015984] [2021-06-05 05:50:05,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:05,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:50:05,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:05,167 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:50:05,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:05,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:05,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:05,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:05,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:05,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:05,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:50:05,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:05,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:05,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:05,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:50:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:05,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376015984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:05,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:05,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:50:05,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682685145] [2021-06-05 05:50:05,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:50:05,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:05,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:50:05,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:50:05,712 INFO L87 Difference]: Start difference. First operand 1729 states and 3525 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:07,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:07,934 INFO L93 Difference]: Finished difference Result 2102 states and 4236 transitions. [2021-06-05 05:50:07,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:50:07,934 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:50:07,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:07,936 INFO L225 Difference]: With dead ends: 2102 [2021-06-05 05:50:07,936 INFO L226 Difference]: Without dead ends: 2038 [2021-06-05 05:50:07,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 1907.1ms TimeCoverageRelationStatistics Valid=454, Invalid=4948, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:50:07,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-06-05 05:50:07,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1730. [2021-06-05 05:50:07,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.0399074609600927) internal successors, (3527), 1729 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:07,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 3527 transitions. [2021-06-05 05:50:07,950 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 3527 transitions. Word has length 40 [2021-06-05 05:50:07,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:07,950 INFO L482 AbstractCegarLoop]: Abstraction has 1730 states and 3527 transitions. [2021-06-05 05:50:07,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:07,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 3527 transitions. [2021-06-05 05:50:07,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:50:07,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:07,952 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:08,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 05:50:08,152 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:08,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:08,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1160365519, now seen corresponding path program 193 times [2021-06-05 05:50:08,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:08,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102589878] [2021-06-05 05:50:08,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:08,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:08,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102589878] [2021-06-05 05:50:08,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102589878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:08,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786217543] [2021-06-05 05:50:08,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:08,505 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:50:08,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:08,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:08,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:08,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:08,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:08,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:50:08,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:08,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:08,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:08,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:50:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:08,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786217543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:08,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:08,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:50:08,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792959191] [2021-06-05 05:50:08,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:50:08,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:08,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:50:08,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:50:08,982 INFO L87 Difference]: Start difference. First operand 1730 states and 3527 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:11,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:11,858 INFO L93 Difference]: Finished difference Result 2190 states and 4414 transitions. [2021-06-05 05:50:11,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 05:50:11,859 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:50:11,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:11,861 INFO L225 Difference]: With dead ends: 2190 [2021-06-05 05:50:11,861 INFO L226 Difference]: Without dead ends: 2118 [2021-06-05 05:50:11,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 2106.4ms TimeCoverageRelationStatistics Valid=546, Invalid=6260, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 05:50:11,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2021-06-05 05:50:11,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1723. [2021-06-05 05:50:11,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 2.0394889663182347) internal successors, (3512), 1722 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:11,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 3512 transitions. [2021-06-05 05:50:11,875 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 3512 transitions. Word has length 40 [2021-06-05 05:50:11,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:11,875 INFO L482 AbstractCegarLoop]: Abstraction has 1723 states and 3512 transitions. [2021-06-05 05:50:11,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:11,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 3512 transitions. [2021-06-05 05:50:11,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:50:11,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:11,876 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:12,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-05 05:50:12,077 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:12,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:12,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1135469963, now seen corresponding path program 194 times [2021-06-05 05:50:12,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:12,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196842343] [2021-06-05 05:50:12,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:12,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:12,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:12,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196842343] [2021-06-05 05:50:12,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196842343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:12,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711251762] [2021-06-05 05:50:12,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:12,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:50:12,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:12,454 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:50:12,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:12,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:12,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:12,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:12,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:12,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:12,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:12,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:50:12,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:12,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:12,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:12,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-06-05 05:50:12,962 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:12,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711251762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:12,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:12,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:50:12,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179669310] [2021-06-05 05:50:12,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:50:12,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:12,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:50:12,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:50:12,963 INFO L87 Difference]: Start difference. First operand 1723 states and 3512 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:14,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:14,865 INFO L93 Difference]: Finished difference Result 1913 states and 3862 transitions. [2021-06-05 05:50:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:50:14,865 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:50:14,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:14,867 INFO L225 Difference]: With dead ends: 1913 [2021-06-05 05:50:14,867 INFO L226 Difference]: Without dead ends: 1857 [2021-06-05 05:50:14,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1682.0ms TimeCoverageRelationStatistics Valid=351, Invalid=4619, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:50:14,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2021-06-05 05:50:14,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1718. [2021-06-05 05:50:14,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 2.0396039603960396) internal successors, (3502), 1717 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:14,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 3502 transitions. [2021-06-05 05:50:14,880 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 3502 transitions. Word has length 40 [2021-06-05 05:50:14,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:14,880 INFO L482 AbstractCegarLoop]: Abstraction has 1718 states and 3502 transitions. [2021-06-05 05:50:14,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:14,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 3502 transitions. [2021-06-05 05:50:14,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:50:14,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:14,882 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:15,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:15,082 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:15,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:15,082 INFO L82 PathProgramCache]: Analyzing trace with hash -870248941, now seen corresponding path program 195 times [2021-06-05 05:50:15,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:15,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62861682] [2021-06-05 05:50:15,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:15,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:15,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62861682] [2021-06-05 05:50:15,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62861682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:15,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196853787] [2021-06-05 05:50:15,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:15,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:50:15,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:15,465 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:50:15,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:15,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:15,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:15,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:15,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:15,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:50:15,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:15,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:15,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:15,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:50:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:16,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196853787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:16,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:16,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-06-05 05:50:16,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083560515] [2021-06-05 05:50:16,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:50:16,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:16,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:50:16,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1302, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:50:16,026 INFO L87 Difference]: Start difference. First operand 1718 states and 3502 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:18,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:18,199 INFO L93 Difference]: Finished difference Result 1950 states and 3923 transitions. [2021-06-05 05:50:18,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:50:18,199 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:50:18,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:18,200 INFO L225 Difference]: With dead ends: 1950 [2021-06-05 05:50:18,200 INFO L226 Difference]: Without dead ends: 1830 [2021-06-05 05:50:18,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 1821.3ms TimeCoverageRelationStatistics Valid=346, Invalid=4624, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:50:18,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2021-06-05 05:50:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1741. [2021-06-05 05:50:18,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 2.039080459770115) internal successors, (3548), 1740 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:18,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 3548 transitions. [2021-06-05 05:50:18,214 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 3548 transitions. Word has length 40 [2021-06-05 05:50:18,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:18,214 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 3548 transitions. [2021-06-05 05:50:18,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:18,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 3548 transitions. [2021-06-05 05:50:18,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:50:18,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:18,215 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:18,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 05:50:18,416 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:18,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:18,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1541813547, now seen corresponding path program 196 times [2021-06-05 05:50:18,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:18,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976252886] [2021-06-05 05:50:18,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:18,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:18,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:18,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976252886] [2021-06-05 05:50:18,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976252886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:18,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621132732] [2021-06-05 05:50:18,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:18,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:50:18,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:18,826 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:50:18,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:19,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:19,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:19,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:19,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:19,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:19,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:19,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:50:19,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:19,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:19,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:19,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:50:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:19,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621132732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:19,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:19,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:50:19,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633056844] [2021-06-05 05:50:19,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:50:19,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:19,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:50:19,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:50:19,372 INFO L87 Difference]: Start difference. First operand 1741 states and 3548 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:21,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:21,313 INFO L93 Difference]: Finished difference Result 1953 states and 3933 transitions. [2021-06-05 05:50:21,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:50:21,313 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:50:21,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:21,315 INFO L225 Difference]: With dead ends: 1953 [2021-06-05 05:50:21,315 INFO L226 Difference]: Without dead ends: 1857 [2021-06-05 05:50:21,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 1891.4ms TimeCoverageRelationStatistics Valid=401, Invalid=4711, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:50:21,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2021-06-05 05:50:21,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1743. [2021-06-05 05:50:21,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1742 states have (on average 2.039035591274397) internal successors, (3552), 1742 states have internal predecessors, (3552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:21,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 3552 transitions. [2021-06-05 05:50:21,327 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 3552 transitions. Word has length 40 [2021-06-05 05:50:21,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:21,327 INFO L482 AbstractCegarLoop]: Abstraction has 1743 states and 3552 transitions. [2021-06-05 05:50:21,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:21,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 3552 transitions. [2021-06-05 05:50:21,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:50:21,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:21,329 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:21,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:21,529 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:21,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:21,529 INFO L82 PathProgramCache]: Analyzing trace with hash -156190957, now seen corresponding path program 197 times [2021-06-05 05:50:21,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:21,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202520510] [2021-06-05 05:50:21,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:21,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:21,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202520510] [2021-06-05 05:50:21,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202520510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:21,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195721013] [2021-06-05 05:50:21,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:21,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:50:21,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:21,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:50:21,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:22,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:22,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:22,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:22,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:22,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:22,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:22,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:50:22,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:22,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:22,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:22,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:50:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:22,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195721013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:22,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:22,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:50:22,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435662091] [2021-06-05 05:50:22,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:50:22,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:22,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:50:22,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:50:22,436 INFO L87 Difference]: Start difference. First operand 1743 states and 3552 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:24,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:24,863 INFO L93 Difference]: Finished difference Result 2027 states and 4088 transitions. [2021-06-05 05:50:24,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:50:24,863 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:50:24,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:24,865 INFO L225 Difference]: With dead ends: 2027 [2021-06-05 05:50:24,865 INFO L226 Difference]: Without dead ends: 1939 [2021-06-05 05:50:24,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 1975.5ms TimeCoverageRelationStatistics Valid=435, Invalid=4967, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:50:24,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2021-06-05 05:50:24,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1748. [2021-06-05 05:50:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 2.0394962793360047) internal successors, (3563), 1747 states have internal predecessors, (3563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:24,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 3563 transitions. [2021-06-05 05:50:24,879 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 3563 transitions. Word has length 40 [2021-06-05 05:50:24,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:24,879 INFO L482 AbstractCegarLoop]: Abstraction has 1748 states and 3563 transitions. [2021-06-05 05:50:24,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:24,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 3563 transitions. [2021-06-05 05:50:24,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:50:24,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:24,881 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:25,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:25,081 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:25,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:25,082 INFO L82 PathProgramCache]: Analyzing trace with hash -797301547, now seen corresponding path program 198 times [2021-06-05 05:50:25,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:25,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284846362] [2021-06-05 05:50:25,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:25,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:25,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284846362] [2021-06-05 05:50:25,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284846362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:25,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090178749] [2021-06-05 05:50:25,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:25,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:50:25,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:25,477 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:50:25,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:25,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:25,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:25,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:25,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:25,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:25,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:50:25,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:25,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:25,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:25,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:50:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:25,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090178749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:25,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:25,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:50:25,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720798968] [2021-06-05 05:50:25,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:50:25,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:25,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:50:25,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:50:25,991 INFO L87 Difference]: Start difference. First operand 1748 states and 3563 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:28,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:28,344 INFO L93 Difference]: Finished difference Result 2061 states and 4160 transitions. [2021-06-05 05:50:28,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:50:28,344 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:50:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:28,345 INFO L225 Difference]: With dead ends: 2061 [2021-06-05 05:50:28,345 INFO L226 Difference]: Without dead ends: 1997 [2021-06-05 05:50:28,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 2062.3ms TimeCoverageRelationStatistics Valid=502, Invalid=5350, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:50:28,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2021-06-05 05:50:28,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1749. [2021-06-05 05:50:28,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 2.039473684210526) internal successors, (3565), 1748 states have internal predecessors, (3565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:28,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 3565 transitions. [2021-06-05 05:50:28,359 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 3565 transitions. Word has length 40 [2021-06-05 05:50:28,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:28,359 INFO L482 AbstractCegarLoop]: Abstraction has 1749 states and 3565 transitions. [2021-06-05 05:50:28,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:28,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 3565 transitions. [2021-06-05 05:50:28,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:50:28,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:28,361 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:28,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:28,569 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:28,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:28,569 INFO L82 PathProgramCache]: Analyzing trace with hash 628940819, now seen corresponding path program 199 times [2021-06-05 05:50:28,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:28,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328208048] [2021-06-05 05:50:28,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:28,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:28,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328208048] [2021-06-05 05:50:28,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328208048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:28,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47819985] [2021-06-05 05:50:28,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:28,917 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:50:28,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:29,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:29,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:29,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:29,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:29,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:50:29,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:29,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:29,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:29,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:50:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:29,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47819985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:29,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:29,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:50:29,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727238317] [2021-06-05 05:50:29,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:50:29,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:29,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:50:29,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:50:29,430 INFO L87 Difference]: Start difference. First operand 1749 states and 3565 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:32,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:32,253 INFO L93 Difference]: Finished difference Result 2161 states and 4359 transitions. [2021-06-05 05:50:32,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 05:50:32,253 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:50:32,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:32,255 INFO L225 Difference]: With dead ends: 2161 [2021-06-05 05:50:32,255 INFO L226 Difference]: Without dead ends: 2089 [2021-06-05 05:50:32,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2116 ImplicationChecksByTransitivity, 2354.0ms TimeCoverageRelationStatistics Valid=638, Invalid=7372, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 05:50:32,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-06-05 05:50:32,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1743. [2021-06-05 05:50:32,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1742 states have (on average 2.039035591274397) internal successors, (3552), 1742 states have internal predecessors, (3552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:32,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 3552 transitions. [2021-06-05 05:50:32,269 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 3552 transitions. Word has length 40 [2021-06-05 05:50:32,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:32,269 INFO L482 AbstractCegarLoop]: Abstraction has 1743 states and 3552 transitions. [2021-06-05 05:50:32,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:32,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 3552 transitions. [2021-06-05 05:50:32,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:50:32,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:32,270 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:32,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 05:50:32,471 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:32,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:32,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1786686753, now seen corresponding path program 200 times [2021-06-05 05:50:32,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:32,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988500150] [2021-06-05 05:50:32,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:32,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:32,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:32,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988500150] [2021-06-05 05:50:32,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988500150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:32,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230082917] [2021-06-05 05:50:32,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:32,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:50:32,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:32,820 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:50:32,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:33,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:33,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:33,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:33,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:33,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:33,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:33,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:50:33,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:33,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:33,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:33,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-06-05 05:50:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:33,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230082917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:33,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:33,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:50:33,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721383287] [2021-06-05 05:50:33,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:50:33,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:33,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:50:33,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:50:33,286 INFO L87 Difference]: Start difference. First operand 1743 states and 3552 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:35,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:35,111 INFO L93 Difference]: Finished difference Result 1931 states and 3897 transitions. [2021-06-05 05:50:35,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:50:35,112 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:50:35,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:35,113 INFO L225 Difference]: With dead ends: 1931 [2021-06-05 05:50:35,113 INFO L226 Difference]: Without dead ends: 1875 [2021-06-05 05:50:35,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 1644.7ms TimeCoverageRelationStatistics Valid=353, Invalid=4759, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:50:35,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-06-05 05:50:35,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1741. [2021-06-05 05:50:35,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 2.039080459770115) internal successors, (3548), 1740 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:35,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 3548 transitions. [2021-06-05 05:50:35,126 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 3548 transitions. Word has length 40 [2021-06-05 05:50:35,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:35,126 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 3548 transitions. [2021-06-05 05:50:35,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:35,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 3548 transitions. [2021-06-05 05:50:35,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:50:35,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:35,127 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:35,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:35,328 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:35,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:35,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1409244241, now seen corresponding path program 201 times [2021-06-05 05:50:35,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:35,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898171029] [2021-06-05 05:50:35,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:35,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:35,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898171029] [2021-06-05 05:50:35,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898171029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:35,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973027930] [2021-06-05 05:50:35,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:35,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:50:35,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:35,720 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:50:35,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:36,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:36,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:36,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:36,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:36,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:50:36,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:36,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:36,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:36,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:50:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:36,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973027930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:36,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:36,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:50:36,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563708104] [2021-06-05 05:50:36,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:50:36,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:36,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:50:36,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:50:36,225 INFO L87 Difference]: Start difference. First operand 1741 states and 3548 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:37,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:37,517 INFO L93 Difference]: Finished difference Result 1883 states and 3808 transitions. [2021-06-05 05:50:37,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:50:37,517 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:50:37,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:37,519 INFO L225 Difference]: With dead ends: 1883 [2021-06-05 05:50:37,519 INFO L226 Difference]: Without dead ends: 1835 [2021-06-05 05:50:37,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1423.1ms TimeCoverageRelationStatistics Valid=276, Invalid=3264, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:50:37,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2021-06-05 05:50:37,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1744. [2021-06-05 05:50:37,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 2.0390131956397015) internal successors, (3554), 1743 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:37,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 3554 transitions. [2021-06-05 05:50:37,532 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 3554 transitions. Word has length 40 [2021-06-05 05:50:37,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:37,532 INFO L482 AbstractCegarLoop]: Abstraction has 1744 states and 3554 transitions. [2021-06-05 05:50:37,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:37,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 3554 transitions. [2021-06-05 05:50:37,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:50:37,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:37,533 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:37,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 05:50:37,734 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:37,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:37,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1500100465, now seen corresponding path program 202 times [2021-06-05 05:50:37,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:37,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841425036] [2021-06-05 05:50:37,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:37,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:38,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:38,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841425036] [2021-06-05 05:50:38,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841425036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:38,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524878276] [2021-06-05 05:50:38,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:38,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:50:38,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:38,117 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:50:38,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:38,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:38,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:38,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:38,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:38,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:38,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:50:38,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:38,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:38,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:38,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:50:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:38,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524878276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:38,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:38,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:50:38,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161544677] [2021-06-05 05:50:38,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:50:38,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:38,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:50:38,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:50:38,659 INFO L87 Difference]: Start difference. First operand 1744 states and 3554 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:40,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:40,148 INFO L93 Difference]: Finished difference Result 1916 states and 3877 transitions. [2021-06-05 05:50:40,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:50:40,148 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:50:40,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:40,149 INFO L225 Difference]: With dead ends: 1916 [2021-06-05 05:50:40,149 INFO L226 Difference]: Without dead ends: 1872 [2021-06-05 05:50:40,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1443.1ms TimeCoverageRelationStatistics Valid=290, Invalid=3370, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:50:40,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-06-05 05:50:40,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1747. [2021-06-05 05:50:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 2.0389461626575027) internal successors, (3560), 1746 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:40,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 3560 transitions. [2021-06-05 05:50:40,163 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 3560 transitions. Word has length 40 [2021-06-05 05:50:40,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:40,163 INFO L482 AbstractCegarLoop]: Abstraction has 1747 states and 3560 transitions. [2021-06-05 05:50:40,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:40,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 3560 transitions. [2021-06-05 05:50:40,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:50:40,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:40,164 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:40,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 05:50:40,364 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:40,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:40,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2141211055, now seen corresponding path program 203 times [2021-06-05 05:50:40,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:40,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785127773] [2021-06-05 05:50:40,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:40,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:40,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785127773] [2021-06-05 05:50:40,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785127773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:40,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752687343] [2021-06-05 05:50:40,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:40,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:50:40,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:40,728 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:50:40,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:41,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:41,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:41,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:41,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:41,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:41,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:50:41,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:41,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:41,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:41,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:50:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:41,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752687343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:41,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:41,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 40 [2021-06-05 05:50:41,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480138237] [2021-06-05 05:50:41,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 05:50:41,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:41,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 05:50:41,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1494, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:50:41,328 INFO L87 Difference]: Start difference. First operand 1747 states and 3560 transitions. Second operand has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:42,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:42,698 INFO L93 Difference]: Finished difference Result 1926 states and 3897 transitions. [2021-06-05 05:50:42,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:50:42,699 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:50:42,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:42,700 INFO L225 Difference]: With dead ends: 1926 [2021-06-05 05:50:42,700 INFO L226 Difference]: Without dead ends: 1894 [2021-06-05 05:50:42,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 1568.3ms TimeCoverageRelationStatistics Valid=379, Invalid=4313, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:50:42,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-06-05 05:50:42,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1748. [2021-06-05 05:50:42,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 2.038923869490555) internal successors, (3562), 1747 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:42,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 3562 transitions. [2021-06-05 05:50:42,713 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 3562 transitions. Word has length 40 [2021-06-05 05:50:42,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:42,713 INFO L482 AbstractCegarLoop]: Abstraction has 1748 states and 3562 transitions. [2021-06-05 05:50:42,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:42,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 3562 transitions. [2021-06-05 05:50:42,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:50:42,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:42,715 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:42,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:42,915 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:42,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:42,915 INFO L82 PathProgramCache]: Analyzing trace with hash -714968689, now seen corresponding path program 204 times [2021-06-05 05:50:42,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:42,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927951726] [2021-06-05 05:50:42,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:43,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:43,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927951726] [2021-06-05 05:50:43,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927951726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:43,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817760034] [2021-06-05 05:50:43,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:43,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:50:43,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:43,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:50:43,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:43,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:43,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:43,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:43,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:43,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:43,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:50:43,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:43,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:43,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:43,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:50:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:43,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817760034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:43,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:43,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:50:43,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602730954] [2021-06-05 05:50:43,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:50:43,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:43,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:50:43,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:50:43,772 INFO L87 Difference]: Start difference. First operand 1748 states and 3562 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:45,615 INFO L93 Difference]: Finished difference Result 1992 states and 4026 transitions. [2021-06-05 05:50:45,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:50:45,615 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:50:45,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:45,617 INFO L225 Difference]: With dead ends: 1992 [2021-06-05 05:50:45,617 INFO L226 Difference]: Without dead ends: 1936 [2021-06-05 05:50:45,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 1757.3ms TimeCoverageRelationStatistics Valid=465, Invalid=5085, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:50:45,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-06-05 05:50:45,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1750. [2021-06-05 05:50:45,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1749 states have (on average 2.03830760434534) internal successors, (3565), 1749 states have internal predecessors, (3565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:45,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 3565 transitions. [2021-06-05 05:50:45,639 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 3565 transitions. Word has length 40 [2021-06-05 05:50:45,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:45,639 INFO L482 AbstractCegarLoop]: Abstraction has 1750 states and 3565 transitions. [2021-06-05 05:50:45,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:45,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 3565 transitions. [2021-06-05 05:50:45,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:50:45,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:45,641 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:45,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 05:50:45,841 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:45,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:45,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1629601435, now seen corresponding path program 205 times [2021-06-05 05:50:45,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:45,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589090363] [2021-06-05 05:50:45,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:46,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:46,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589090363] [2021-06-05 05:50:46,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589090363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:46,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756414328] [2021-06-05 05:50:46,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:46,220 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:50:46,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:46,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:46,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:46,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:46,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:46,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:46,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:50:46,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:46,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:46,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:46,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-06-05 05:50:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:46,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756414328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:46,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:46,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:50:46,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065201143] [2021-06-05 05:50:46,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:50:46,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:46,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:50:46,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:50:46,683 INFO L87 Difference]: Start difference. First operand 1750 states and 3565 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:48,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:48,331 INFO L93 Difference]: Finished difference Result 1906 states and 3854 transitions. [2021-06-05 05:50:48,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:50:48,331 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:50:48,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:48,333 INFO L225 Difference]: With dead ends: 1906 [2021-06-05 05:50:48,333 INFO L226 Difference]: Without dead ends: 1878 [2021-06-05 05:50:48,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1467.3ms TimeCoverageRelationStatistics Valid=318, Invalid=3972, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:50:48,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2021-06-05 05:50:48,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1741. [2021-06-05 05:50:48,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 2.039080459770115) internal successors, (3548), 1740 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:48,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 3548 transitions. [2021-06-05 05:50:48,352 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 3548 transitions. Word has length 40 [2021-06-05 05:50:48,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:48,352 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 3548 transitions. [2021-06-05 05:50:48,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:48,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 3548 transitions. [2021-06-05 05:50:48,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:50:48,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:48,353 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:48,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 05:50:48,561 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:48,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:48,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1162379203, now seen corresponding path program 206 times [2021-06-05 05:50:48,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:48,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687593318] [2021-06-05 05:50:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:48,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:48,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687593318] [2021-06-05 05:50:48,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687593318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:48,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201197704] [2021-06-05 05:50:48,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:48,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:50:48,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:48,904 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:50:48,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:49,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:49,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:49,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:49,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:49,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:50:49,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:49,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:49,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:49,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:50:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:49,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201197704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:49,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:49,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:50:49,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611134821] [2021-06-05 05:50:49,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:50:49,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:49,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:50:49,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:50:49,401 INFO L87 Difference]: Start difference. First operand 1741 states and 3548 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:50,571 INFO L93 Difference]: Finished difference Result 1890 states and 3818 transitions. [2021-06-05 05:50:50,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:50:50,571 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:50:50,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:50,573 INFO L225 Difference]: With dead ends: 1890 [2021-06-05 05:50:50,573 INFO L226 Difference]: Without dead ends: 1826 [2021-06-05 05:50:50,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1200.3ms TimeCoverageRelationStatistics Valid=227, Invalid=2853, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:50:50,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2021-06-05 05:50:50,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 1745. [2021-06-05 05:50:50,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1744 states have (on average 2.0389908256880735) internal successors, (3556), 1744 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:50,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 3556 transitions. [2021-06-05 05:50:50,591 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 3556 transitions. Word has length 40 [2021-06-05 05:50:50,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:50,591 INFO L482 AbstractCegarLoop]: Abstraction has 1745 states and 3556 transitions. [2021-06-05 05:50:50,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:50,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 3556 transitions. [2021-06-05 05:50:50,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:50:50,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:50,592 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:50,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:50,793 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:50,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:50,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1576213761, now seen corresponding path program 207 times [2021-06-05 05:50:50,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:50,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967141791] [2021-06-05 05:50:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:51,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:51,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967141791] [2021-06-05 05:50:51,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967141791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:51,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622200441] [2021-06-05 05:50:51,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:51,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:50:51,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:51,188 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:50:51,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:51,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:51,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:51,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:51,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:51,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:50:51,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:51,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:51,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:51,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:50:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:51,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622200441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:51,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:51,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-06-05 05:50:51,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669481058] [2021-06-05 05:50:51,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:50:51,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:51,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:50:51,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1296, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:50:51,699 INFO L87 Difference]: Start difference. First operand 1745 states and 3556 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:53,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:53,596 INFO L93 Difference]: Finished difference Result 2022 states and 4068 transitions. [2021-06-05 05:50:53,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:50:53,597 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:50:53,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:53,598 INFO L225 Difference]: With dead ends: 2022 [2021-06-05 05:50:53,598 INFO L226 Difference]: Without dead ends: 1902 [2021-06-05 05:50:53,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 1776.7ms TimeCoverageRelationStatistics Valid=378, Invalid=4878, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:50:53,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2021-06-05 05:50:53,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1761. [2021-06-05 05:50:53,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1760 states have (on average 2.039772727272727) internal successors, (3590), 1760 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:53,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 3590 transitions. [2021-06-05 05:50:53,612 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 3590 transitions. Word has length 40 [2021-06-05 05:50:53,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:53,612 INFO L482 AbstractCegarLoop]: Abstraction has 1761 states and 3590 transitions. [2021-06-05 05:50:53,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:53,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 3590 transitions. [2021-06-05 05:50:53,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:50:53,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:53,613 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:53,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:53,814 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:53,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:53,814 INFO L82 PathProgramCache]: Analyzing trace with hash 904649155, now seen corresponding path program 208 times [2021-06-05 05:50:53,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:53,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269825527] [2021-06-05 05:50:53,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:54,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:54,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269825527] [2021-06-05 05:50:54,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269825527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:54,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006818419] [2021-06-05 05:50:54,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:54,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:50:54,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:54,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:50:54,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:54,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:54,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:54,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:54,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:54,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:54,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:54,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:50:54,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:54,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:54,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:54,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:50:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:54,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006818419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:54,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:54,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:50:54,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796281003] [2021-06-05 05:50:54,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:50:54,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:54,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:50:54,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:50:54,666 INFO L87 Difference]: Start difference. First operand 1761 states and 3590 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:56,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:56,809 INFO L93 Difference]: Finished difference Result 2042 states and 4108 transitions. [2021-06-05 05:50:56,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:50:56,810 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:50:56,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:56,811 INFO L225 Difference]: With dead ends: 2042 [2021-06-05 05:50:56,811 INFO L226 Difference]: Without dead ends: 1945 [2021-06-05 05:50:56,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 1936.9ms TimeCoverageRelationStatistics Valid=452, Invalid=5248, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 05:50:56,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-06-05 05:50:56,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1762. [2021-06-05 05:50:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 2.0391822827938673) internal successors, (3591), 1761 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 3591 transitions. [2021-06-05 05:50:56,825 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 3591 transitions. Word has length 40 [2021-06-05 05:50:56,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:56,825 INFO L482 AbstractCegarLoop]: Abstraction has 1762 states and 3591 transitions. [2021-06-05 05:50:56,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:56,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 3591 transitions. [2021-06-05 05:50:56,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:50:56,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:56,826 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:57,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:57,027 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:57,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:57,027 INFO L82 PathProgramCache]: Analyzing trace with hash -2004695551, now seen corresponding path program 209 times [2021-06-05 05:50:57,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:57,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003361509] [2021-06-05 05:50:57,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:57,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:57,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003361509] [2021-06-05 05:50:57,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003361509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:57,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175146320] [2021-06-05 05:50:57,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:57,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:50:57,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:57,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:50:57,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:57,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:57,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:57,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:57,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:57,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:57,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:50:57,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:57,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:57,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:57,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:50:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:57,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175146320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:57,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:57,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:50:57,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11151702] [2021-06-05 05:50:57,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:50:57,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:57,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:50:57,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:50:57,859 INFO L87 Difference]: Start difference. First operand 1762 states and 3591 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:00,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:00,755 INFO L93 Difference]: Finished difference Result 2140 states and 4313 transitions. [2021-06-05 05:51:00,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 05:51:00,755 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:51:00,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:00,757 INFO L225 Difference]: With dead ends: 2140 [2021-06-05 05:51:00,757 INFO L226 Difference]: Without dead ends: 2048 [2021-06-05 05:51:00,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 2124.6ms TimeCoverageRelationStatistics Valid=497, Invalid=5983, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 05:51:00,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-06-05 05:51:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1774. [2021-06-05 05:51:00,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 2.04117315284828) internal successors, (3619), 1773 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:00,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 3619 transitions. [2021-06-05 05:51:00,771 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 3619 transitions. Word has length 40 [2021-06-05 05:51:00,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:00,771 INFO L482 AbstractCegarLoop]: Abstraction has 1774 states and 3619 transitions. [2021-06-05 05:51:00,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:00,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 3619 transitions. [2021-06-05 05:51:00,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:51:00,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:00,772 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:00,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:00,972 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:00,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:00,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1649161155, now seen corresponding path program 210 times [2021-06-05 05:51:00,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:00,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200909326] [2021-06-05 05:51:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:01,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:01,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200909326] [2021-06-05 05:51:01,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200909326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:01,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177375852] [2021-06-05 05:51:01,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:01,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:51:01,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:01,310 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:51:01,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:01,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:01,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:01,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:01,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:01,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:51:01,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:01,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:01,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:01,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:51:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:01,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177375852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:01,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:01,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:51:01,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230787822] [2021-06-05 05:51:01,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:51:01,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:01,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:51:01,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:51:01,790 INFO L87 Difference]: Start difference. First operand 1774 states and 3619 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:04,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:04,405 INFO L93 Difference]: Finished difference Result 2160 states and 4356 transitions. [2021-06-05 05:51:04,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:51:04,405 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:51:04,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:04,407 INFO L225 Difference]: With dead ends: 2160 [2021-06-05 05:51:04,407 INFO L226 Difference]: Without dead ends: 2096 [2021-06-05 05:51:04,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 2051.8ms TimeCoverageRelationStatistics Valid=511, Invalid=5809, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 05:51:04,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2021-06-05 05:51:04,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 1775. [2021-06-05 05:51:04,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1775 states, 1774 states have (on average 2.0411499436302143) internal successors, (3621), 1774 states have internal predecessors, (3621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:04,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 3621 transitions. [2021-06-05 05:51:04,421 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 3621 transitions. Word has length 40 [2021-06-05 05:51:04,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:04,421 INFO L482 AbstractCegarLoop]: Abstraction has 1775 states and 3621 transitions. [2021-06-05 05:51:04,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:04,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 3621 transitions. [2021-06-05 05:51:04,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:51:04,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:04,423 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:04,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:04,623 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:04,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:04,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1219563775, now seen corresponding path program 211 times [2021-06-05 05:51:04,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:04,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335505776] [2021-06-05 05:51:04,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:04,941 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:04,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:04,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335505776] [2021-06-05 05:51:04,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335505776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:04,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715432183] [2021-06-05 05:51:04,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:04,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:04,963 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:51:04,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:05,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:05,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:05,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:05,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:05,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:51:05,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:05,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:05,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:05,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:51:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:05,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715432183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:05,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:05,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:51:05,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188299520] [2021-06-05 05:51:05,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:51:05,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:05,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:51:05,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:51:05,440 INFO L87 Difference]: Start difference. First operand 1775 states and 3621 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:08,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:08,758 INFO L93 Difference]: Finished difference Result 2253 states and 4543 transitions. [2021-06-05 05:51:08,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 05:51:08,758 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:51:08,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:08,760 INFO L225 Difference]: With dead ends: 2253 [2021-06-05 05:51:08,760 INFO L226 Difference]: Without dead ends: 2181 [2021-06-05 05:51:08,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2084 ImplicationChecksByTransitivity, 2317.2ms TimeCoverageRelationStatistics Valid=603, Invalid=7229, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 05:51:08,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-06-05 05:51:08,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 1764. [2021-06-05 05:51:08,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 2.0385706182643224) internal successors, (3594), 1763 states have internal predecessors, (3594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:08,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 3594 transitions. [2021-06-05 05:51:08,774 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 3594 transitions. Word has length 40 [2021-06-05 05:51:08,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:08,774 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 3594 transitions. [2021-06-05 05:51:08,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:08,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 3594 transitions. [2021-06-05 05:51:08,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:51:08,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:08,775 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:08,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 05:51:08,976 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:08,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:08,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1244459331, now seen corresponding path program 212 times [2021-06-05 05:51:08,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:08,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672375407] [2021-06-05 05:51:08,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:09,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:09,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672375407] [2021-06-05 05:51:09,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672375407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:09,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48975968] [2021-06-05 05:51:09,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:09,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:51:09,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:09,326 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:51:09,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:09,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:09,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:09,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:09,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:09,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:09,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:09,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:51:09,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:09,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:09,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:09,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-06-05 05:51:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:09,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48975968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:09,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:09,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:51:09,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447421354] [2021-06-05 05:51:09,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:51:09,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:09,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:51:09,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:51:09,799 INFO L87 Difference]: Start difference. First operand 1764 states and 3594 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:11,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:11,543 INFO L93 Difference]: Finished difference Result 1963 states and 3963 transitions. [2021-06-05 05:51:11,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:51:11,543 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:51:11,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:11,545 INFO L225 Difference]: With dead ends: 1963 [2021-06-05 05:51:11,545 INFO L226 Difference]: Without dead ends: 1907 [2021-06-05 05:51:11,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 1525.9ms TimeCoverageRelationStatistics Valid=337, Invalid=4493, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:51:11,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-06-05 05:51:11,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1759. [2021-06-05 05:51:11,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1758 states have (on average 2.0386803185437996) internal successors, (3584), 1758 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:11,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 3584 transitions. [2021-06-05 05:51:11,559 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 3584 transitions. Word has length 40 [2021-06-05 05:51:11,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:11,559 INFO L482 AbstractCegarLoop]: Abstraction has 1759 states and 3584 transitions. [2021-06-05 05:51:11,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:11,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 3584 transitions. [2021-06-05 05:51:11,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:51:11,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:11,560 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:11,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 05:51:11,760 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:11,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:11,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1044789061, now seen corresponding path program 213 times [2021-06-05 05:51:11,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:11,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070229671] [2021-06-05 05:51:11,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:12,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:12,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070229671] [2021-06-05 05:51:12,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070229671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:12,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764181247] [2021-06-05 05:51:12,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:12,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:51:12,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:12,118 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:51:12,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:12,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:12,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:12,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:12,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:12,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:51:12,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:12,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:12,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:12,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:51:12,639 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:12,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764181247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:12,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:12,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-06-05 05:51:12,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949662463] [2021-06-05 05:51:12,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:51:12,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:12,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:51:12,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:51:12,640 INFO L87 Difference]: Start difference. First operand 1759 states and 3584 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:14,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:14,643 INFO L93 Difference]: Finished difference Result 1995 states and 4014 transitions. [2021-06-05 05:51:14,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:51:14,643 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:51:14,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:14,645 INFO L225 Difference]: With dead ends: 1995 [2021-06-05 05:51:14,645 INFO L226 Difference]: Without dead ends: 1875 [2021-06-05 05:51:14,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 1761.9ms TimeCoverageRelationStatistics Valid=349, Invalid=4763, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:51:14,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-06-05 05:51:14,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1780. [2021-06-05 05:51:14,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 2.038785834738617) internal successors, (3627), 1779 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:14,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 3627 transitions. [2021-06-05 05:51:14,658 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 3627 transitions. Word has length 40 [2021-06-05 05:51:14,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:14,658 INFO L482 AbstractCegarLoop]: Abstraction has 1780 states and 3627 transitions. [2021-06-05 05:51:14,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:14,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 3627 transitions. [2021-06-05 05:51:14,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:51:14,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:14,659 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:14,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 05:51:14,860 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:14,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:14,860 INFO L82 PathProgramCache]: Analyzing trace with hash 373224455, now seen corresponding path program 214 times [2021-06-05 05:51:14,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:14,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241018980] [2021-06-05 05:51:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:15,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:15,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241018980] [2021-06-05 05:51:15,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241018980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:15,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525677506] [2021-06-05 05:51:15,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:15,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:51:15,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:15,229 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:51:15,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:15,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:15,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:15,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:15,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:15,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:15,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:15,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:51:15,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:15,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:15,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:15,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:51:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:15,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525677506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:15,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:15,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:51:15,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316475341] [2021-06-05 05:51:15,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:51:15,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:15,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:51:15,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:51:15,734 INFO L87 Difference]: Start difference. First operand 1780 states and 3627 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:17,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:17,759 INFO L93 Difference]: Finished difference Result 1992 states and 4011 transitions. [2021-06-05 05:51:17,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:51:17,759 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:51:17,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:17,760 INFO L225 Difference]: With dead ends: 1992 [2021-06-05 05:51:17,760 INFO L226 Difference]: Without dead ends: 1896 [2021-06-05 05:51:17,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 1917.8ms TimeCoverageRelationStatistics Valid=416, Invalid=5134, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:51:17,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-06-05 05:51:17,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1781. [2021-06-05 05:51:17,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1781 states, 1780 states have (on average 2.0382022471910113) internal successors, (3628), 1780 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:17,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 3628 transitions. [2021-06-05 05:51:17,774 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 3628 transitions. Word has length 40 [2021-06-05 05:51:17,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:17,774 INFO L482 AbstractCegarLoop]: Abstraction has 1781 states and 3628 transitions. [2021-06-05 05:51:17,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:17,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 3628 transitions. [2021-06-05 05:51:17,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:51:17,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:17,775 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:17,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-06-05 05:51:17,976 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:17,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:17,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1758847045, now seen corresponding path program 215 times [2021-06-05 05:51:17,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:17,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384212446] [2021-06-05 05:51:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:18,297 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:18,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:18,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384212446] [2021-06-05 05:51:18,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384212446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:18,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762473830] [2021-06-05 05:51:18,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:18,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:51:18,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:18,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:51:18,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:18,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:18,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:18,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:18,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:18,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:18,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:18,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:51:18,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:18,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:18,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:18,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:51:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:18,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762473830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:18,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:18,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:51:18,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105093801] [2021-06-05 05:51:18,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:51:18,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:18,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:51:18,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:51:18,840 INFO L87 Difference]: Start difference. First operand 1781 states and 3628 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:21,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:21,359 INFO L93 Difference]: Finished difference Result 2068 states and 4169 transitions. [2021-06-05 05:51:21,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:51:21,359 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:51:21,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:21,361 INFO L225 Difference]: With dead ends: 2068 [2021-06-05 05:51:21,361 INFO L226 Difference]: Without dead ends: 1980 [2021-06-05 05:51:21,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 2023.8ms TimeCoverageRelationStatistics Valid=432, Invalid=5268, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 05:51:21,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-06-05 05:51:21,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1786. [2021-06-05 05:51:21,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 2.038655462184874) internal successors, (3639), 1785 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:21,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 3639 transitions. [2021-06-05 05:51:21,374 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 3639 transitions. Word has length 40 [2021-06-05 05:51:21,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:21,374 INFO L482 AbstractCegarLoop]: Abstraction has 1786 states and 3639 transitions. [2021-06-05 05:51:21,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:21,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 3639 transitions. [2021-06-05 05:51:21,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:51:21,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:21,376 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:21,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-05 05:51:21,576 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:21,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:21,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1117736455, now seen corresponding path program 216 times [2021-06-05 05:51:21,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:21,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027389469] [2021-06-05 05:51:21,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:21,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:21,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027389469] [2021-06-05 05:51:21,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027389469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:21,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096538638] [2021-06-05 05:51:21,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:21,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:51:21,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:21,930 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:51:21,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:22,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:22,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:51:22,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:22,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:22,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:22,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:51:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:22,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096538638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:22,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:22,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:51:22,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370644871] [2021-06-05 05:51:22,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:51:22,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:22,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:51:22,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:51:22,394 INFO L87 Difference]: Start difference. First operand 1786 states and 3639 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:24,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:24,776 INFO L93 Difference]: Finished difference Result 2098 states and 4232 transitions. [2021-06-05 05:51:24,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:51:24,777 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:51:24,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:24,778 INFO L225 Difference]: With dead ends: 2098 [2021-06-05 05:51:24,778 INFO L226 Difference]: Without dead ends: 2034 [2021-06-05 05:51:24,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 2000.4ms TimeCoverageRelationStatistics Valid=496, Invalid=5666, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:51:24,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-06-05 05:51:24,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1787. [2021-06-05 05:51:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 2.038633818589026) internal successors, (3641), 1786 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:24,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 3641 transitions. [2021-06-05 05:51:24,792 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 3641 transitions. Word has length 40 [2021-06-05 05:51:24,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:24,792 INFO L482 AbstractCegarLoop]: Abstraction has 1787 states and 3641 transitions. [2021-06-05 05:51:24,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:24,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 3641 transitions. [2021-06-05 05:51:24,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:51:24,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:24,794 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:24,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:24,997 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:24,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:24,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1750988475, now seen corresponding path program 217 times [2021-06-05 05:51:24,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:24,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231771594] [2021-06-05 05:51:24,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:25,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:25,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231771594] [2021-06-05 05:51:25,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231771594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:25,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14602112] [2021-06-05 05:51:25,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:25,361 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:51:25,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:25,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:25,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:25,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:25,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:25,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:51:25,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:25,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:25,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:25,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:51:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:25,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14602112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:25,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:25,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:51:25,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040480123] [2021-06-05 05:51:25,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:51:25,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:25,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:51:25,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:51:25,823 INFO L87 Difference]: Start difference. First operand 1787 states and 3641 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:28,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:28,821 INFO L93 Difference]: Finished difference Result 2196 states and 4427 transitions. [2021-06-05 05:51:28,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 05:51:28,821 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:51:28,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:28,823 INFO L225 Difference]: With dead ends: 2196 [2021-06-05 05:51:28,823 INFO L226 Difference]: Without dead ends: 2124 [2021-06-05 05:51:28,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2132 ImplicationChecksByTransitivity, 2321.3ms TimeCoverageRelationStatistics Valid=608, Invalid=7402, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 05:51:28,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2021-06-05 05:51:28,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1778. [2021-06-05 05:51:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 2.0382667416994935) internal successors, (3622), 1777 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 3622 transitions. [2021-06-05 05:51:28,837 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 3622 transitions. Word has length 40 [2021-06-05 05:51:28,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:28,838 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 3622 transitions. [2021-06-05 05:51:28,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 3622 transitions. [2021-06-05 05:51:28,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:51:28,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:28,839 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:29,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:29,039 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:29,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:29,040 INFO L82 PathProgramCache]: Analyzing trace with hash 128351249, now seen corresponding path program 218 times [2021-06-05 05:51:29,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:29,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916342644] [2021-06-05 05:51:29,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:29,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:29,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916342644] [2021-06-05 05:51:29,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916342644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:29,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833614056] [2021-06-05 05:51:29,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:29,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:51:29,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:29,384 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:51:29,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:29,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:29,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:29,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:29,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:29,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:29,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:29,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:51:29,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:29,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:29,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:29,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-06-05 05:51:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:29,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833614056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:29,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:29,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:51:29,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479890353] [2021-06-05 05:51:29,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:51:29,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:29,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:51:29,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:51:29,853 INFO L87 Difference]: Start difference. First operand 1778 states and 3622 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:31,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:31,576 INFO L93 Difference]: Finished difference Result 1974 states and 3983 transitions. [2021-06-05 05:51:31,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:51:31,576 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:51:31,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:31,578 INFO L225 Difference]: With dead ends: 1974 [2021-06-05 05:51:31,578 INFO L226 Difference]: Without dead ends: 1918 [2021-06-05 05:51:31,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1545.7ms TimeCoverageRelationStatistics Valid=337, Invalid=4493, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:51:31,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-06-05 05:51:31,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1771. [2021-06-05 05:51:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1770 states have (on average 2.0384180790960453) internal successors, (3608), 1770 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 3608 transitions. [2021-06-05 05:51:31,591 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 3608 transitions. Word has length 40 [2021-06-05 05:51:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:31,591 INFO L482 AbstractCegarLoop]: Abstraction has 1771 states and 3608 transitions. [2021-06-05 05:51:31,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:31,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 3608 transitions. [2021-06-05 05:51:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:51:31,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:31,592 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:31,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:31,793 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:31,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:31,793 INFO L82 PathProgramCache]: Analyzing trace with hash -970685053, now seen corresponding path program 219 times [2021-06-05 05:51:31,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:31,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398199195] [2021-06-05 05:51:31,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:32,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:32,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398199195] [2021-06-05 05:51:32,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398199195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:32,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851717223] [2021-06-05 05:51:32,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:32,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:51:32,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:32,160 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:51:32,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:32,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:32,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:32,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:32,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:32,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:51:32,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:32,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:32,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:32,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:51:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:32,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851717223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:32,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:32,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:51:32,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800565566] [2021-06-05 05:51:32,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:51:32,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:32,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:51:32,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:51:32,735 INFO L87 Difference]: Start difference. First operand 1771 states and 3608 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:34,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:34,599 INFO L93 Difference]: Finished difference Result 1994 states and 4013 transitions. [2021-06-05 05:51:34,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:51:34,599 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:51:34,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:34,601 INFO L225 Difference]: With dead ends: 1994 [2021-06-05 05:51:34,601 INFO L226 Difference]: Without dead ends: 1898 [2021-06-05 05:51:34,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 1742.7ms TimeCoverageRelationStatistics Valid=346, Invalid=4346, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:51:34,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2021-06-05 05:51:34,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1781. [2021-06-05 05:51:34,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1781 states, 1780 states have (on average 2.0382022471910113) internal successors, (3628), 1780 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:34,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 3628 transitions. [2021-06-05 05:51:34,615 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 3628 transitions. Word has length 40 [2021-06-05 05:51:34,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:34,615 INFO L482 AbstractCegarLoop]: Abstraction has 1781 states and 3628 transitions. [2021-06-05 05:51:34,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:34,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 3628 transitions. [2021-06-05 05:51:34,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:51:34,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:34,616 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:34,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:34,817 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:34,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:34,817 INFO L82 PathProgramCache]: Analyzing trace with hash 414937537, now seen corresponding path program 220 times [2021-06-05 05:51:34,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:34,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329927838] [2021-06-05 05:51:34,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:35,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:35,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329927838] [2021-06-05 05:51:35,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329927838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:35,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974742968] [2021-06-05 05:51:35,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:35,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:51:35,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:35,169 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:51:35,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:35,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:35,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:35,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:35,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:35,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:35,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:35,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:51:35,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:35,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:35,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:35,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:51:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:35,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974742968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:35,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:35,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:51:35,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253280315] [2021-06-05 05:51:35,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:51:35,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:35,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:51:35,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:51:35,673 INFO L87 Difference]: Start difference. First operand 1781 states and 3628 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:37,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:37,716 INFO L93 Difference]: Finished difference Result 2038 states and 4107 transitions. [2021-06-05 05:51:37,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:51:37,717 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:51:37,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:37,718 INFO L225 Difference]: With dead ends: 2038 [2021-06-05 05:51:37,718 INFO L226 Difference]: Without dead ends: 1950 [2021-06-05 05:51:37,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 1730.6ms TimeCoverageRelationStatistics Valid=365, Invalid=4465, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:51:37,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2021-06-05 05:51:37,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1784. [2021-06-05 05:51:37,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 2.0381379697139654) internal successors, (3634), 1783 states have internal predecessors, (3634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 3634 transitions. [2021-06-05 05:51:37,732 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 3634 transitions. Word has length 40 [2021-06-05 05:51:37,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:37,732 INFO L482 AbstractCegarLoop]: Abstraction has 1784 states and 3634 transitions. [2021-06-05 05:51:37,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:37,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 3634 transitions. [2021-06-05 05:51:37,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:51:37,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:37,733 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:37,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:37,934 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:37,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:37,934 INFO L82 PathProgramCache]: Analyzing trace with hash -226173053, now seen corresponding path program 221 times [2021-06-05 05:51:37,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:37,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595248331] [2021-06-05 05:51:37,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:38,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:38,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595248331] [2021-06-05 05:51:38,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595248331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:38,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833955664] [2021-06-05 05:51:38,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:38,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:51:38,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:38,295 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:51:38,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:38,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:38,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:51:38,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:38,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:38,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:38,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:51:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:38,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833955664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:38,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:38,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 38 [2021-06-05 05:51:38,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113192001] [2021-06-05 05:51:38,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:51:38,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:38,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:51:38,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1350, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:51:38,845 INFO L87 Difference]: Start difference. First operand 1784 states and 3634 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:41,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:41,153 INFO L93 Difference]: Finished difference Result 2044 states and 4120 transitions. [2021-06-05 05:51:41,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:51:41,153 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:51:41,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:41,154 INFO L225 Difference]: With dead ends: 2044 [2021-06-05 05:51:41,154 INFO L226 Difference]: Without dead ends: 1980 [2021-06-05 05:51:41,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 1872.1ms TimeCoverageRelationStatistics Valid=474, Invalid=5226, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 05:51:41,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-06-05 05:51:41,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1785. [2021-06-05 05:51:41,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 2.0381165919282513) internal successors, (3636), 1784 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:41,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 3636 transitions. [2021-06-05 05:51:41,168 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 3636 transitions. Word has length 40 [2021-06-05 05:51:41,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:41,168 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 3636 transitions. [2021-06-05 05:51:41,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:41,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 3636 transitions. [2021-06-05 05:51:41,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:51:41,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:41,169 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:41,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 05:51:41,377 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:41,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:41,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1200069313, now seen corresponding path program 222 times [2021-06-05 05:51:41,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:41,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801575522] [2021-06-05 05:51:41,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:41,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:41,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801575522] [2021-06-05 05:51:41,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801575522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:41,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788607104] [2021-06-05 05:51:41,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:41,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:51:41,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:41,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:51:41,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:42,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:42,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:51:42,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:42,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:42,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:42,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:51:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:42,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788607104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:42,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:42,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:51:42,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349594168] [2021-06-05 05:51:42,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:51:42,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:42,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:51:42,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:51:42,210 INFO L87 Difference]: Start difference. First operand 1785 states and 3636 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:44,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:44,981 INFO L93 Difference]: Finished difference Result 2151 states and 4329 transitions. [2021-06-05 05:51:44,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 05:51:44,982 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:51:44,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:44,983 INFO L225 Difference]: With dead ends: 2151 [2021-06-05 05:51:44,983 INFO L226 Difference]: Without dead ends: 2067 [2021-06-05 05:51:44,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 2128.2ms TimeCoverageRelationStatistics Valid=612, Invalid=6870, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 05:51:44,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-06-05 05:51:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1787. [2021-06-05 05:51:44,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 2.0375139977603585) internal successors, (3639), 1786 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:44,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 3639 transitions. [2021-06-05 05:51:44,997 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 3639 transitions. Word has length 40 [2021-06-05 05:51:44,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:44,997 INFO L482 AbstractCegarLoop]: Abstraction has 1787 states and 3639 transitions. [2021-06-05 05:51:44,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:44,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 3639 transitions. [2021-06-05 05:51:44,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:51:44,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:44,998 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:45,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 05:51:45,199 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:45,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:45,199 INFO L82 PathProgramCache]: Analyzing trace with hash 285436567, now seen corresponding path program 223 times [2021-06-05 05:51:45,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:45,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049765417] [2021-06-05 05:51:45,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:45,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:45,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049765417] [2021-06-05 05:51:45,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049765417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:45,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640454814] [2021-06-05 05:51:45,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:45,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:51:45,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:45,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:45,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:45,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:45,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:45,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:51:45,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:45,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:45,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:45,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-06-05 05:51:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:46,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640454814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:46,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:46,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:51:46,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125695841] [2021-06-05 05:51:46,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:51:46,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:46,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:51:46,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:51:46,002 INFO L87 Difference]: Start difference. First operand 1787 states and 3639 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:47,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:47,814 INFO L93 Difference]: Finished difference Result 1991 states and 4013 transitions. [2021-06-05 05:51:47,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:51:47,814 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:51:47,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:47,816 INFO L225 Difference]: With dead ends: 1991 [2021-06-05 05:51:47,816 INFO L226 Difference]: Without dead ends: 1935 [2021-06-05 05:51:47,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 1616.3ms TimeCoverageRelationStatistics Valid=379, Invalid=5023, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:51:47,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2021-06-05 05:51:47,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1780. [2021-06-05 05:51:47,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 2.038223721191681) internal successors, (3626), 1779 states have internal predecessors, (3626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:47,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 3626 transitions. [2021-06-05 05:51:47,830 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 3626 transitions. Word has length 40 [2021-06-05 05:51:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:47,830 INFO L482 AbstractCegarLoop]: Abstraction has 1780 states and 3626 transitions. [2021-06-05 05:51:47,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:47,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 3626 transitions. [2021-06-05 05:51:47,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:51:47,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:47,832 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:48,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 05:51:48,032 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:48,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:48,033 INFO L82 PathProgramCache]: Analyzing trace with hash 573735085, now seen corresponding path program 224 times [2021-06-05 05:51:48,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:48,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221326401] [2021-06-05 05:51:48,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:48,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:48,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221326401] [2021-06-05 05:51:48,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221326401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:48,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119066049] [2021-06-05 05:51:48,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:48,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:51:48,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:48,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:51:48,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:48,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:48,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:51:48,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:48,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:48,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:48,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:51:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:48,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119066049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:48,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:48,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:51:48,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341821378] [2021-06-05 05:51:48,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:51:48,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:48,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:51:48,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:51:48,916 INFO L87 Difference]: Start difference. First operand 1780 states and 3626 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:51,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:51,555 INFO L93 Difference]: Finished difference Result 2047 states and 4123 transitions. [2021-06-05 05:51:51,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 05:51:51,555 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:51:51,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:51,557 INFO L225 Difference]: With dead ends: 2047 [2021-06-05 05:51:51,557 INFO L226 Difference]: Without dead ends: 1927 [2021-06-05 05:51:51,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 2191.9ms TimeCoverageRelationStatistics Valid=449, Invalid=6193, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 05:51:51,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2021-06-05 05:51:51,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1806. [2021-06-05 05:51:51,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 2.0398891966759) internal successors, (3682), 1805 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:51,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 3682 transitions. [2021-06-05 05:51:51,570 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 3682 transitions. Word has length 40 [2021-06-05 05:51:51,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:51,571 INFO L482 AbstractCegarLoop]: Abstraction has 1806 states and 3682 transitions. [2021-06-05 05:51:51,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:51,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 3682 transitions. [2021-06-05 05:51:51,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:51:51,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:51,572 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:51,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 05:51:51,773 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:51,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:51,773 INFO L82 PathProgramCache]: Analyzing trace with hash -97829521, now seen corresponding path program 225 times [2021-06-05 05:51:51,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:51,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045447696] [2021-06-05 05:51:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:52,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:52,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045447696] [2021-06-05 05:51:52,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045447696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:52,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567977961] [2021-06-05 05:51:52,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:52,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:51:52,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:52,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:51:52,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:52,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:52,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:52,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:52,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:52,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:51:52,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:52,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:52,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:52,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:51:52,670 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:52,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567977961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:52,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:52,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:51:52,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522481204] [2021-06-05 05:51:52,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:51:52,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:52,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:51:52,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:51:52,671 INFO L87 Difference]: Start difference. First operand 1806 states and 3682 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:55,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:55,512 INFO L93 Difference]: Finished difference Result 2042 states and 4116 transitions. [2021-06-05 05:51:55,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:51:55,512 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:51:55,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:55,514 INFO L225 Difference]: With dead ends: 2042 [2021-06-05 05:51:55,514 INFO L226 Difference]: Without dead ends: 1946 [2021-06-05 05:51:55,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 2240.1ms TimeCoverageRelationStatistics Valid=495, Invalid=6311, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 05:51:55,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2021-06-05 05:51:55,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1807. [2021-06-05 05:51:55,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1806 states have (on average 2.039313399778516) internal successors, (3683), 1806 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:55,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 3683 transitions. [2021-06-05 05:51:55,527 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 3683 transitions. Word has length 40 [2021-06-05 05:51:55,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:55,528 INFO L482 AbstractCegarLoop]: Abstraction has 1807 states and 3683 transitions. [2021-06-05 05:51:55,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:55,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 3683 transitions. [2021-06-05 05:51:55,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:51:55,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:55,535 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:55,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-06-05 05:51:55,736 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:55,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:55,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1287793069, now seen corresponding path program 226 times [2021-06-05 05:51:55,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:55,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853255336] [2021-06-05 05:51:55,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:56,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:56,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853255336] [2021-06-05 05:51:56,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853255336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:56,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671994884] [2021-06-05 05:51:56,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:56,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:51:56,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:56,084 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:51:56,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:56,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:56,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:56,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:56,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:56,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:56,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:56,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:51:56,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:56,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:56,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:56,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:51:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:56,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671994884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:56,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:56,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:51:56,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575686214] [2021-06-05 05:51:56,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:51:56,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:56,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:51:56,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:51:56,576 INFO L87 Difference]: Start difference. First operand 1807 states and 3683 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:59,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:59,629 INFO L93 Difference]: Finished difference Result 2095 states and 4226 transitions. [2021-06-05 05:51:59,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 05:51:59,629 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:51:59,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:59,631 INFO L225 Difference]: With dead ends: 2095 [2021-06-05 05:51:59,631 INFO L226 Difference]: Without dead ends: 2007 [2021-06-05 05:51:59,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 2367.8ms TimeCoverageRelationStatistics Valid=529, Invalid=6611, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 05:51:59,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2021-06-05 05:51:59,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1812. [2021-06-05 05:51:59,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1811 states have (on average 2.0381004969630037) internal successors, (3691), 1811 states have internal predecessors, (3691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:59,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 3691 transitions. [2021-06-05 05:51:59,645 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 3691 transitions. Word has length 40 [2021-06-05 05:51:59,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:59,645 INFO L482 AbstractCegarLoop]: Abstraction has 1812 states and 3691 transitions. [2021-06-05 05:51:59,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:59,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 3691 transitions. [2021-06-05 05:51:59,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:51:59,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:59,646 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:59,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-05 05:51:59,847 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:59,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:59,847 INFO L82 PathProgramCache]: Analyzing trace with hash 646682479, now seen corresponding path program 227 times [2021-06-05 05:51:59,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:59,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612822697] [2021-06-05 05:51:59,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:00,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:00,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612822697] [2021-06-05 05:52:00,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612822697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:00,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159219980] [2021-06-05 05:52:00,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:00,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:52:00,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:00,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:52:00,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:00,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:00,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:00,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:00,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:00,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:52:00,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:00,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:00,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:00,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:52:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:00,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159219980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:00,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:00,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:52:00,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639352265] [2021-06-05 05:52:00,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:52:00,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:00,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:52:00,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:52:00,664 INFO L87 Difference]: Start difference. First operand 1812 states and 3691 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:03,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:03,617 INFO L93 Difference]: Finished difference Result 2121 states and 4280 transitions. [2021-06-05 05:52:03,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 05:52:03,617 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:52:03,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:03,619 INFO L225 Difference]: With dead ends: 2121 [2021-06-05 05:52:03,619 INFO L226 Difference]: Without dead ends: 2057 [2021-06-05 05:52:03,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 2296.1ms TimeCoverageRelationStatistics Valid=593, Invalid=6889, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 05:52:03,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2021-06-05 05:52:03,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 1813. [2021-06-05 05:52:03,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 2.0380794701986753) internal successors, (3693), 1812 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:03,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 3693 transitions. [2021-06-05 05:52:03,633 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 3693 transitions. Word has length 40 [2021-06-05 05:52:03,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:03,633 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 3693 transitions. [2021-06-05 05:52:03,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:03,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 3693 transitions. [2021-06-05 05:52:03,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:52:03,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:03,635 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:03,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:03,835 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:03,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:03,836 INFO L82 PathProgramCache]: Analyzing trace with hash 2072924845, now seen corresponding path program 228 times [2021-06-05 05:52:03,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:03,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972401482] [2021-06-05 05:52:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:04,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:04,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972401482] [2021-06-05 05:52:04,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972401482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:04,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246376363] [2021-06-05 05:52:04,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:04,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:52:04,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:04,183 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:52:04,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:04,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:04,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:04,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:04,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:04,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:04,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:04,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2021-06-05 05:52:04,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:04,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:04,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:04,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:25 [2021-06-05 05:52:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:04,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246376363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:04,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:04,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 40 [2021-06-05 05:52:04,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984990099] [2021-06-05 05:52:04,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 05:52:04,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:04,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 05:52:04,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:52:04,837 INFO L87 Difference]: Start difference. First operand 1813 states and 3693 transitions. Second operand has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:08,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:08,696 INFO L93 Difference]: Finished difference Result 2222 states and 4477 transitions. [2021-06-05 05:52:08,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:52:08,697 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:52:08,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:08,698 INFO L225 Difference]: With dead ends: 2222 [2021-06-05 05:52:08,698 INFO L226 Difference]: Without dead ends: 2148 [2021-06-05 05:52:08,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2386 ImplicationChecksByTransitivity, 2998.1ms TimeCoverageRelationStatistics Valid=706, Invalid=9194, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 05:52:08,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2021-06-05 05:52:08,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 1812. [2021-06-05 05:52:08,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1811 states have (on average 2.0392048591938154) internal successors, (3693), 1811 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:08,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 3693 transitions. [2021-06-05 05:52:08,713 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 3693 transitions. Word has length 40 [2021-06-05 05:52:08,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:08,713 INFO L482 AbstractCegarLoop]: Abstraction has 1812 states and 3693 transitions. [2021-06-05 05:52:08,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:08,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 3693 transitions. [2021-06-05 05:52:08,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:52:08,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:08,714 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:08,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:08,915 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:08,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:08,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1022987885, now seen corresponding path program 229 times [2021-06-05 05:52:08,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:08,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563736523] [2021-06-05 05:52:08,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:09,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:09,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563736523] [2021-06-05 05:52:09,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563736523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:09,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500063764] [2021-06-05 05:52:09,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:09,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:09,263 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:52:09,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:09,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:09,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:09,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:09,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:09,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:09,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:09,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:52:09,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:09,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:09,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:09,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:52:09,773 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:09,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500063764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:09,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:09,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:52:09,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939400339] [2021-06-05 05:52:09,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:52:09,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:09,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:52:09,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:52:09,774 INFO L87 Difference]: Start difference. First operand 1812 states and 3693 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:11,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:11,736 INFO L93 Difference]: Finished difference Result 2007 states and 4046 transitions. [2021-06-05 05:52:11,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:52:11,736 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:52:11,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:11,737 INFO L225 Difference]: With dead ends: 2007 [2021-06-05 05:52:11,737 INFO L226 Difference]: Without dead ends: 1922 [2021-06-05 05:52:11,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1714.8ms TimeCoverageRelationStatistics Valid=358, Invalid=4612, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:52:11,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2021-06-05 05:52:11,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1819. [2021-06-05 05:52:11,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 2.0374037403740375) internal successors, (3704), 1818 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 3704 transitions. [2021-06-05 05:52:11,751 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 3704 transitions. Word has length 40 [2021-06-05 05:52:11,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:11,751 INFO L482 AbstractCegarLoop]: Abstraction has 1819 states and 3704 transitions. [2021-06-05 05:52:11,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:11,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 3704 transitions. [2021-06-05 05:52:11,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:52:11,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:11,752 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:11,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:11,953 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:11,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:11,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1664098475, now seen corresponding path program 230 times [2021-06-05 05:52:11,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:11,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667048256] [2021-06-05 05:52:11,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:12,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:12,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667048256] [2021-06-05 05:52:12,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667048256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:12,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375781018] [2021-06-05 05:52:12,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:12,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:52:12,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:12,299 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:52:12,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:12,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:12,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:12,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:12,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:12,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:12,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:12,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:52:12,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:12,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:12,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:12,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:52:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:12,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375781018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:12,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:12,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:52:12,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766827634] [2021-06-05 05:52:12,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:52:12,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:12,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:52:12,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:52:12,789 INFO L87 Difference]: Start difference. First operand 1819 states and 3704 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:14,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:14,388 INFO L93 Difference]: Finished difference Result 2009 states and 4052 transitions. [2021-06-05 05:52:14,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:52:14,389 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:52:14,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:14,390 INFO L225 Difference]: With dead ends: 2009 [2021-06-05 05:52:14,390 INFO L226 Difference]: Without dead ends: 1948 [2021-06-05 05:52:14,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 1652.9ms TimeCoverageRelationStatistics Valid=411, Invalid=4701, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:52:14,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-06-05 05:52:14,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1813. [2021-06-05 05:52:14,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 2.0375275938189845) internal successors, (3692), 1812 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:14,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 3692 transitions. [2021-06-05 05:52:14,404 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 3692 transitions. Word has length 40 [2021-06-05 05:52:14,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:14,404 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 3692 transitions. [2021-06-05 05:52:14,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:14,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 3692 transitions. [2021-06-05 05:52:14,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:52:14,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:14,406 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:14,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 05:52:14,606 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:14,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:14,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1490840907, now seen corresponding path program 231 times [2021-06-05 05:52:14,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:14,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485456234] [2021-06-05 05:52:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:14,931 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:14,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:14,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485456234] [2021-06-05 05:52:14,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485456234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:14,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726708710] [2021-06-05 05:52:14,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:14,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:52:14,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:14,954 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:52:14,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:15,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:15,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:15,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:15,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:15,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:15,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:15,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:52:15,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:15,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:15,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:15,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-06-05 05:52:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:15,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726708710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:15,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:15,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:52:15,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213887564] [2021-06-05 05:52:15,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:52:15,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:15,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:52:15,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:52:15,431 INFO L87 Difference]: Start difference. First operand 1813 states and 3692 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:17,320 INFO L93 Difference]: Finished difference Result 2006 states and 4046 transitions. [2021-06-05 05:52:17,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:52:17,320 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:52:17,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:17,322 INFO L225 Difference]: With dead ends: 2006 [2021-06-05 05:52:17,322 INFO L226 Difference]: Without dead ends: 1945 [2021-06-05 05:52:17,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 1633.1ms TimeCoverageRelationStatistics Valid=374, Invalid=4738, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:52:17,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-06-05 05:52:17,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1808. [2021-06-05 05:52:17,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1807 states have (on average 2.0376314333148864) internal successors, (3682), 1807 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:17,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 3682 transitions. [2021-06-05 05:52:17,352 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 3682 transitions. Word has length 40 [2021-06-05 05:52:17,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:17,352 INFO L482 AbstractCegarLoop]: Abstraction has 1808 states and 3682 transitions. [2021-06-05 05:52:17,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:17,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 3682 transitions. [2021-06-05 05:52:17,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:52:17,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:17,354 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:17,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:17,568 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:17,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:17,569 INFO L82 PathProgramCache]: Analyzing trace with hash -342702727, now seen corresponding path program 232 times [2021-06-05 05:52:17,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:17,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414026857] [2021-06-05 05:52:17,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:17,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:17,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414026857] [2021-06-05 05:52:17,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414026857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:17,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439992587] [2021-06-05 05:52:17,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:17,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:52:17,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:17,927 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:52:17,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:18,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:18,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:18,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:18,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:18,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:18,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:52:18,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:18,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:18,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:18,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-06-05 05:52:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:18,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439992587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:18,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:18,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:52:18,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702917898] [2021-06-05 05:52:18,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:52:18,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:18,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:52:18,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1232, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:52:18,423 INFO L87 Difference]: Start difference. First operand 1808 states and 3682 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:20,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:20,285 INFO L93 Difference]: Finished difference Result 1999 states and 4032 transitions. [2021-06-05 05:52:20,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:52:20,286 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:52:20,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:20,287 INFO L225 Difference]: With dead ends: 1999 [2021-06-05 05:52:20,287 INFO L226 Difference]: Without dead ends: 1943 [2021-06-05 05:52:20,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 1728.1ms TimeCoverageRelationStatistics Valid=373, Invalid=5029, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:52:20,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2021-06-05 05:52:20,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1804. [2021-06-05 05:52:20,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 2.0377149195784803) internal successors, (3674), 1803 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:20,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 3674 transitions. [2021-06-05 05:52:20,301 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 3674 transitions. Word has length 40 [2021-06-05 05:52:20,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:20,301 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 3674 transitions. [2021-06-05 05:52:20,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:20,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 3674 transitions. [2021-06-05 05:52:20,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:52:20,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:20,303 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:20,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 05:52:20,503 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:20,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:20,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1441739029, now seen corresponding path program 233 times [2021-06-05 05:52:20,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:20,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262186619] [2021-06-05 05:52:20,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:20,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:20,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262186619] [2021-06-05 05:52:20,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262186619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:20,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939706482] [2021-06-05 05:52:20,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:20,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:52:20,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:20,867 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 05:52:20,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:21,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:21,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:21,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:21,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:21,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:52:21,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:21,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:21,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:21,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:52:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:21,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939706482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:21,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:21,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:52:21,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416488198] [2021-06-05 05:52:21,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:52:21,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:21,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:52:21,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:52:21,346 INFO L87 Difference]: Start difference. First operand 1804 states and 3674 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:23,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:23,593 INFO L93 Difference]: Finished difference Result 2056 states and 4142 transitions. [2021-06-05 05:52:23,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:52:23,593 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:52:23,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:23,595 INFO L225 Difference]: With dead ends: 2056 [2021-06-05 05:52:23,595 INFO L226 Difference]: Without dead ends: 1960 [2021-06-05 05:52:23,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 1894.7ms TimeCoverageRelationStatistics Valid=424, Invalid=5428, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:52:23,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-06-05 05:52:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1816. [2021-06-05 05:52:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 2.0391184573002756) internal successors, (3701), 1815 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 3701 transitions. [2021-06-05 05:52:23,609 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 3701 transitions. Word has length 40 [2021-06-05 05:52:23,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:23,609 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 3701 transitions. [2021-06-05 05:52:23,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 3701 transitions. [2021-06-05 05:52:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:52:23,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:23,610 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:23,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:23,811 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:23,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:23,811 INFO L82 PathProgramCache]: Analyzing trace with hash -56116439, now seen corresponding path program 234 times [2021-06-05 05:52:23,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:23,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562269211] [2021-06-05 05:52:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:24,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:24,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562269211] [2021-06-05 05:52:24,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562269211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:24,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314147635] [2021-06-05 05:52:24,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:24,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:52:24,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:24,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:52:24,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:24,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:24,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:24,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:24,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:24,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:52:24,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:24,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:24,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:24,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:52:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:24,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314147635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:24,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:24,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:52:24,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296683060] [2021-06-05 05:52:24,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:52:24,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:24,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:52:24,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:52:24,651 INFO L87 Difference]: Start difference. First operand 1816 states and 3701 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:27,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:27,203 INFO L93 Difference]: Finished difference Result 2078 states and 4190 transitions. [2021-06-05 05:52:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:52:27,204 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:52:27,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:27,205 INFO L225 Difference]: With dead ends: 2078 [2021-06-05 05:52:27,205 INFO L226 Difference]: Without dead ends: 1990 [2021-06-05 05:52:27,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 2039.9ms TimeCoverageRelationStatistics Valid=449, Invalid=5557, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 05:52:27,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2021-06-05 05:52:27,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 1819. [2021-06-05 05:52:27,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 2.0374037403740375) internal successors, (3704), 1818 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:27,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 3704 transitions. [2021-06-05 05:52:27,219 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 3704 transitions. Word has length 40 [2021-06-05 05:52:27,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:27,219 INFO L482 AbstractCegarLoop]: Abstraction has 1819 states and 3704 transitions. [2021-06-05 05:52:27,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:27,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 3704 transitions. [2021-06-05 05:52:27,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:52:27,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:27,221 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:27,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:27,421 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:27,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:27,421 INFO L82 PathProgramCache]: Analyzing trace with hash -697227029, now seen corresponding path program 235 times [2021-06-05 05:52:27,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:27,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420960619] [2021-06-05 05:52:27,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:27,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:27,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420960619] [2021-06-05 05:52:27,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420960619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:27,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037726760] [2021-06-05 05:52:27,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:27,770 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:52:27,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:28,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:28,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:28,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:28,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:28,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:28,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:52:28,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:28,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:28,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:28,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:52:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:28,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037726760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:28,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:28,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:52:28,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800066258] [2021-06-05 05:52:28,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:52:28,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:28,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:52:28,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:52:28,229 INFO L87 Difference]: Start difference. First operand 1819 states and 3704 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:30,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:30,729 INFO L93 Difference]: Finished difference Result 2083 states and 4199 transitions. [2021-06-05 05:52:30,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 05:52:30,730 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:52:30,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:30,731 INFO L225 Difference]: With dead ends: 2083 [2021-06-05 05:52:30,731 INFO L226 Difference]: Without dead ends: 2019 [2021-06-05 05:52:30,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 2014.3ms TimeCoverageRelationStatistics Valid=540, Invalid=5940, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 05:52:30,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-06-05 05:52:30,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1820. [2021-06-05 05:52:30,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1819 states have (on average 2.0373831775700935) internal successors, (3706), 1819 states have internal predecessors, (3706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:30,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 3706 transitions. [2021-06-05 05:52:30,745 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 3706 transitions. Word has length 40 [2021-06-05 05:52:30,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:30,745 INFO L482 AbstractCegarLoop]: Abstraction has 1820 states and 3706 transitions. [2021-06-05 05:52:30,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:30,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 3706 transitions. [2021-06-05 05:52:30,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:52:30,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:30,747 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:30,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-06-05 05:52:30,947 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:30,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:30,947 INFO L82 PathProgramCache]: Analyzing trace with hash 729015337, now seen corresponding path program 236 times [2021-06-05 05:52:30,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:30,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357195111] [2021-06-05 05:52:30,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:31,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:31,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357195111] [2021-06-05 05:52:31,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357195111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:31,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416002956] [2021-06-05 05:52:31,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:31,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:52:31,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:31,314 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:52:31,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:31,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:31,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:31,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:31,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:31,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:31,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:31,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:52:31,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:31,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:31,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:31,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:52:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:31,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416002956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:31,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:31,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:52:31,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429277743] [2021-06-05 05:52:31,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:52:31,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:31,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:52:31,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:52:31,771 INFO L87 Difference]: Start difference. First operand 1820 states and 3706 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:34,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:34,938 INFO L93 Difference]: Finished difference Result 2198 states and 4421 transitions. [2021-06-05 05:52:34,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 05:52:34,938 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:52:34,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:34,940 INFO L225 Difference]: With dead ends: 2198 [2021-06-05 05:52:34,940 INFO L226 Difference]: Without dead ends: 2111 [2021-06-05 05:52:34,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2613 ImplicationChecksByTransitivity, 2479.4ms TimeCoverageRelationStatistics Valid=733, Invalid=8579, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 05:52:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2021-06-05 05:52:34,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1822. [2021-06-05 05:52:34,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 2.0367929708951125) internal successors, (3709), 1821 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:34,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 3709 transitions. [2021-06-05 05:52:34,961 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 3709 transitions. Word has length 40 [2021-06-05 05:52:34,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:34,961 INFO L482 AbstractCegarLoop]: Abstraction has 1822 states and 3709 transitions. [2021-06-05 05:52:34,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:34,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 3709 transitions. [2021-06-05 05:52:34,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:52:34,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:34,963 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:35,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:35,163 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:35,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:35,164 INFO L82 PathProgramCache]: Analyzing trace with hash -185617409, now seen corresponding path program 237 times [2021-06-05 05:52:35,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:35,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542141528] [2021-06-05 05:52:35,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:35,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:35,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542141528] [2021-06-05 05:52:35,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542141528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:35,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125445517] [2021-06-05 05:52:35,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:35,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:52:35,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:35,518 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:52:35,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:35,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:35,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:35,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:35,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:35,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:52:35,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:35,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:35,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:35,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-06-05 05:52:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:35,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125445517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:35,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:35,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:52:35,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322085574] [2021-06-05 05:52:35,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:52:35,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:35,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:52:35,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:52:35,949 INFO L87 Difference]: Start difference. First operand 1822 states and 3709 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:38,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:38,108 INFO L93 Difference]: Finished difference Result 2059 states and 4148 transitions. [2021-06-05 05:52:38,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 05:52:38,108 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:52:38,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:38,110 INFO L225 Difference]: With dead ends: 2059 [2021-06-05 05:52:38,110 INFO L226 Difference]: Without dead ends: 2000 [2021-06-05 05:52:38,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 1848.0ms TimeCoverageRelationStatistics Valid=476, Invalid=6166, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 05:52:38,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-06-05 05:52:38,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1810. [2021-06-05 05:52:38,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 2.0375898286346046) internal successors, (3686), 1809 states have internal predecessors, (3686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 3686 transitions. [2021-06-05 05:52:38,124 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 3686 transitions. Word has length 40 [2021-06-05 05:52:38,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:38,124 INFO L482 AbstractCegarLoop]: Abstraction has 1810 states and 3686 transitions. [2021-06-05 05:52:38,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:38,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 3686 transitions. [2021-06-05 05:52:38,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:52:38,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:38,126 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:38,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:38,326 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:38,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:38,327 INFO L82 PathProgramCache]: Analyzing trace with hash -945367575, now seen corresponding path program 238 times [2021-06-05 05:52:38,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:38,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918290525] [2021-06-05 05:52:38,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:38,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:38,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918290525] [2021-06-05 05:52:38,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918290525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:38,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117067013] [2021-06-05 05:52:38,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:38,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:52:38,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:38,695 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:52:38,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:39,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:39,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:39,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:39,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:39,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:39,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:39,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:52:39,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:39,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:39,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:39,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:52:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:39,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117067013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:39,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:39,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:52:39,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212068519] [2021-06-05 05:52:39,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:52:39,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:39,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:52:39,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:52:39,179 INFO L87 Difference]: Start difference. First operand 1810 states and 3686 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:41,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:41,759 INFO L93 Difference]: Finished difference Result 2103 states and 4238 transitions. [2021-06-05 05:52:41,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 05:52:41,759 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:52:41,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:41,760 INFO L225 Difference]: With dead ends: 2103 [2021-06-05 05:52:41,760 INFO L226 Difference]: Without dead ends: 2007 [2021-06-05 05:52:41,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2238 ImplicationChecksByTransitivity, 2168.2ms TimeCoverageRelationStatistics Valid=531, Invalid=7301, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 05:52:41,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2021-06-05 05:52:41,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1833. [2021-06-05 05:52:41,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 2.0398471615720526) internal successors, (3737), 1832 states have internal predecessors, (3737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:41,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 3737 transitions. [2021-06-05 05:52:41,774 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 3737 transitions. Word has length 40 [2021-06-05 05:52:41,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:41,774 INFO L482 AbstractCegarLoop]: Abstraction has 1833 states and 3737 transitions. [2021-06-05 05:52:41,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:41,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 3737 transitions. [2021-06-05 05:52:41,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:52:41,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:41,775 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:41,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:41,976 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:41,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:41,976 INFO L82 PathProgramCache]: Analyzing trace with hash 440255015, now seen corresponding path program 239 times [2021-06-05 05:52:41,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:41,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137167049] [2021-06-05 05:52:41,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:42,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:42,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137167049] [2021-06-05 05:52:42,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137167049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:42,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756286278] [2021-06-05 05:52:42,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:42,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:52:42,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:42,330 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:52:42,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:42,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:42,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:42,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:42,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:42,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:52:42,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:42,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:42,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:42,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:52:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:42,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756286278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:42,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:42,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 38 [2021-06-05 05:52:42,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478437512] [2021-06-05 05:52:42,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:52:42,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:42,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:52:42,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1363, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:52:42,860 INFO L87 Difference]: Start difference. First operand 1833 states and 3737 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:45,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:45,963 INFO L93 Difference]: Finished difference Result 2150 states and 4339 transitions. [2021-06-05 05:52:45,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:52:45,968 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:52:45,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:45,970 INFO L225 Difference]: With dead ends: 2150 [2021-06-05 05:52:45,970 INFO L226 Difference]: Without dead ends: 2062 [2021-06-05 05:52:45,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2619 ImplicationChecksByTransitivity, 2401.1ms TimeCoverageRelationStatistics Valid=621, Invalid=8309, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 05:52:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-06-05 05:52:45,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1836. [2021-06-05 05:52:45,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1835 states have (on average 2.0397820163487737) internal successors, (3743), 1835 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:45,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 3743 transitions. [2021-06-05 05:52:45,985 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 3743 transitions. Word has length 40 [2021-06-05 05:52:45,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:45,985 INFO L482 AbstractCegarLoop]: Abstraction has 1836 states and 3743 transitions. [2021-06-05 05:52:45,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:45,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 3743 transitions. [2021-06-05 05:52:45,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:52:45,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:45,986 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:46,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:46,187 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:46,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:46,187 INFO L82 PathProgramCache]: Analyzing trace with hash -200855575, now seen corresponding path program 240 times [2021-06-05 05:52:46,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:46,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632265333] [2021-06-05 05:52:46,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:46,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:46,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632265333] [2021-06-05 05:52:46,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632265333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:46,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852110331] [2021-06-05 05:52:46,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:46,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:52:46,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:46,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:52:46,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:46,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:46,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:46,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:46,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:46,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:52:46,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:46,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:46,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:46,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:52:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:47,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852110331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:47,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:47,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:52:47,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757627716] [2021-06-05 05:52:47,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:52:47,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:47,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:52:47,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:52:47,002 INFO L87 Difference]: Start difference. First operand 1836 states and 3743 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:50,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:50,616 INFO L93 Difference]: Finished difference Result 2178 states and 4394 transitions. [2021-06-05 05:52:50,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 05:52:50,617 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:52:50,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:50,618 INFO L225 Difference]: With dead ends: 2178 [2021-06-05 05:52:50,618 INFO L226 Difference]: Without dead ends: 2114 [2021-06-05 05:52:50,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 2596.4ms TimeCoverageRelationStatistics Valid=791, Invalid=9921, Unknown=0, NotChecked=0, Total=10712 [2021-06-05 05:52:50,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-06-05 05:52:50,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1837. [2021-06-05 05:52:50,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 2.039760348583878) internal successors, (3745), 1836 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:50,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 3745 transitions. [2021-06-05 05:52:50,632 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 3745 transitions. Word has length 40 [2021-06-05 05:52:50,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:50,633 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 3745 transitions. [2021-06-05 05:52:50,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:50,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 3745 transitions. [2021-06-05 05:52:50,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:52:50,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:50,634 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:50,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2021-06-05 05:52:50,834 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:50,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:50,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1225386791, now seen corresponding path program 241 times [2021-06-05 05:52:50,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:50,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272608968] [2021-06-05 05:52:50,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:51,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:51,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272608968] [2021-06-05 05:52:51,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272608968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:51,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224418653] [2021-06-05 05:52:51,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:51,188 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:52:51,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:51,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:51,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:51,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:51,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:51,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:52:51,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:51,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:51,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:51,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:52:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:51,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224418653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:51,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:51,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:52:51,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132379219] [2021-06-05 05:52:51,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:52:51,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:51,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:52:51,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:52:51,636 INFO L87 Difference]: Start difference. First operand 1837 states and 3745 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:55,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:55,973 INFO L93 Difference]: Finished difference Result 2368 states and 4762 transitions. [2021-06-05 05:52:55,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 05:52:55,974 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:52:55,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:55,975 INFO L225 Difference]: With dead ends: 2368 [2021-06-05 05:52:55,975 INFO L226 Difference]: Without dead ends: 2278 [2021-06-05 05:52:55,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4476 ImplicationChecksByTransitivity, 3036.3ms TimeCoverageRelationStatistics Valid=962, Invalid=13080, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 05:52:55,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-06-05 05:52:55,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 1842. [2021-06-05 05:52:55,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 2.0391091797935905) internal successors, (3754), 1841 states have internal predecessors, (3754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:55,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 3754 transitions. [2021-06-05 05:52:55,991 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 3754 transitions. Word has length 40 [2021-06-05 05:52:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:55,991 INFO L482 AbstractCegarLoop]: Abstraction has 1842 states and 3754 transitions. [2021-06-05 05:52:55,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:55,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 3754 transitions. [2021-06-05 05:52:55,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:52:55,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:55,993 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:56,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:56,193 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:56,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:56,193 INFO L82 PathProgramCache]: Analyzing trace with hash 310754045, now seen corresponding path program 242 times [2021-06-05 05:52:56,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:56,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089324671] [2021-06-05 05:52:56,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:56,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:56,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089324671] [2021-06-05 05:52:56,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089324671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:56,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703181168] [2021-06-05 05:52:56,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:56,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:52:56,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:56,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:52:56,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:56,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:56,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:56,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:56,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:56,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:56,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:56,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:52:56,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:56,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:56,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:56,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-06-05 05:52:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:57,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703181168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:57,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:57,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:52:57,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399235278] [2021-06-05 05:52:57,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:52:57,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:57,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:52:57,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:52:57,012 INFO L87 Difference]: Start difference. First operand 1842 states and 3754 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:59,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:59,346 INFO L93 Difference]: Finished difference Result 2097 states and 4227 transitions. [2021-06-05 05:52:59,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 05:52:59,346 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:52:59,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:59,348 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 05:52:59,348 INFO L226 Difference]: Without dead ends: 2041 [2021-06-05 05:52:59,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1753 ImplicationChecksByTransitivity, 1832.6ms TimeCoverageRelationStatistics Valid=443, Invalid=6199, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 05:52:59,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-06-05 05:52:59,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1824. [2021-06-05 05:52:59,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1823 states have (on average 2.040043883708173) internal successors, (3719), 1823 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:59,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 3719 transitions. [2021-06-05 05:52:59,362 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 3719 transitions. Word has length 40 [2021-06-05 05:52:59,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:59,362 INFO L482 AbstractCegarLoop]: Abstraction has 1824 states and 3719 transitions. [2021-06-05 05:52:59,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:59,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 3719 transitions. [2021-06-05 05:52:59,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:52:59,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:59,363 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:59,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-05 05:52:59,564 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:59,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:59,564 INFO L82 PathProgramCache]: Analyzing trace with hash 314170323, now seen corresponding path program 243 times [2021-06-05 05:52:59,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:59,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013323936] [2021-06-05 05:52:59,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:59,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:59,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013323936] [2021-06-05 05:52:59,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013323936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:59,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087902437] [2021-06-05 05:52:59,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:59,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:52:59,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:59,948 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:52:59,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:00,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:00,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:00,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:00,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:00,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:00,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:53:00,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:00,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:00,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:00,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:53:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:00,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087902437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:00,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:00,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-06-05 05:53:00,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945053339] [2021-06-05 05:53:00,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:53:00,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:00,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:53:00,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:53:00,451 INFO L87 Difference]: Start difference. First operand 1824 states and 3719 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:03,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:03,254 INFO L93 Difference]: Finished difference Result 2110 states and 4255 transitions. [2021-06-05 05:53:03,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 05:53:03,254 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:53:03,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:03,255 INFO L225 Difference]: With dead ends: 2110 [2021-06-05 05:53:03,256 INFO L226 Difference]: Without dead ends: 2022 [2021-06-05 05:53:03,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 2207.5ms TimeCoverageRelationStatistics Valid=499, Invalid=7157, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 05:53:03,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-06-05 05:53:03,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1863. [2021-06-05 05:53:03,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 2.0408163265306123) internal successors, (3800), 1862 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:03,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 3800 transitions. [2021-06-05 05:53:03,270 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 3800 transitions. Word has length 40 [2021-06-05 05:53:03,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:03,270 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 3800 transitions. [2021-06-05 05:53:03,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:03,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 3800 transitions. [2021-06-05 05:53:03,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:53:03,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:03,271 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:03,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-05 05:53:03,472 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:03,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:03,472 INFO L82 PathProgramCache]: Analyzing trace with hash -326940267, now seen corresponding path program 244 times [2021-06-05 05:53:03,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:03,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345278540] [2021-06-05 05:53:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:03,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:03,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345278540] [2021-06-05 05:53:03,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345278540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:03,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985481159] [2021-06-05 05:53:03,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:03,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:53:03,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:03,844 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:53:03,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:04,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:04,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:04,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:04,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:04,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:53:04,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:04,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:04,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:04,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:53:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:04,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985481159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:04,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:04,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:53:04,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257922682] [2021-06-05 05:53:04,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:53:04,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:04,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:53:04,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:53:04,300 INFO L87 Difference]: Start difference. First operand 1863 states and 3800 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:06,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:06,997 INFO L93 Difference]: Finished difference Result 2124 states and 4289 transitions. [2021-06-05 05:53:06,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 05:53:06,997 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:53:06,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:06,999 INFO L225 Difference]: With dead ends: 2124 [2021-06-05 05:53:06,999 INFO L226 Difference]: Without dead ends: 2060 [2021-06-05 05:53:06,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2201 ImplicationChecksByTransitivity, 2079.1ms TimeCoverageRelationStatistics Valid=506, Invalid=7150, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 05:53:07,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-06-05 05:53:07,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1877. [2021-06-05 05:53:07,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 2.041044776119403) internal successors, (3829), 1876 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:07,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 3829 transitions. [2021-06-05 05:53:07,014 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 3829 transitions. Word has length 40 [2021-06-05 05:53:07,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:07,014 INFO L482 AbstractCegarLoop]: Abstraction has 1877 states and 3829 transitions. [2021-06-05 05:53:07,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:07,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 3829 transitions. [2021-06-05 05:53:07,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:53:07,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:07,015 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:07,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:07,217 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:07,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:07,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1099302099, now seen corresponding path program 245 times [2021-06-05 05:53:07,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:07,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265786417] [2021-06-05 05:53:07,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:07,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:07,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265786417] [2021-06-05 05:53:07,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265786417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:07,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429588696] [2021-06-05 05:53:07,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:07,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:53:07,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:07,601 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:53:07,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:07,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:07,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:07,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:07,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:07,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:07,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:53:07,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:07,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:07,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:07,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:53:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:08,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429588696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:08,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:08,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 38 [2021-06-05 05:53:08,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971747915] [2021-06-05 05:53:08,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:53:08,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:08,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:53:08,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1361, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:53:08,083 INFO L87 Difference]: Start difference. First operand 1877 states and 3829 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:11,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:11,239 INFO L93 Difference]: Finished difference Result 2198 states and 4424 transitions. [2021-06-05 05:53:11,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 05:53:11,239 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:53:11,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:11,241 INFO L225 Difference]: With dead ends: 2198 [2021-06-05 05:53:11,241 INFO L226 Difference]: Without dead ends: 2120 [2021-06-05 05:53:11,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3057 ImplicationChecksByTransitivity, 2355.6ms TimeCoverageRelationStatistics Valid=640, Invalid=9260, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 05:53:11,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-06-05 05:53:11,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1876. [2021-06-05 05:53:11,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.0405333333333333) internal successors, (3826), 1875 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:11,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 3826 transitions. [2021-06-05 05:53:11,256 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 3826 transitions. Word has length 40 [2021-06-05 05:53:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:11,256 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 3826 transitions. [2021-06-05 05:53:11,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:11,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 3826 transitions. [2021-06-05 05:53:11,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:53:11,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:11,257 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:11,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-06-05 05:53:11,458 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:11,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:11,458 INFO L82 PathProgramCache]: Analyzing trace with hash 994455481, now seen corresponding path program 246 times [2021-06-05 05:53:11,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:11,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093013019] [2021-06-05 05:53:11,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:11,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:11,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093013019] [2021-06-05 05:53:11,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093013019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:11,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857482380] [2021-06-05 05:53:11,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:11,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:53:11,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:11,831 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-05 05:53:11,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:12,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:12,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:12,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:12,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:12,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:12,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:12,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:12,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:12,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:12,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:12,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:12,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:12,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2021-06-05 05:53:12,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:12,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:12,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:12,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:67, output treesize:10 [2021-06-05 05:53:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:12,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857482380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:12,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:12,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 44 [2021-06-05 05:53:12,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375386155] [2021-06-05 05:53:12,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 05:53:12,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:12,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 05:53:12,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1863, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:53:12,633 INFO L87 Difference]: Start difference. First operand 1876 states and 3826 transitions. Second operand has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:16,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:16,158 INFO L93 Difference]: Finished difference Result 2144 states and 4327 transitions. [2021-06-05 05:53:16,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 05:53:16,158 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:53:16,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:16,160 INFO L225 Difference]: With dead ends: 2144 [2021-06-05 05:53:16,160 INFO L226 Difference]: Without dead ends: 2080 [2021-06-05 05:53:16,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 2899.3ms TimeCoverageRelationStatistics Valid=545, Invalid=7645, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 05:53:16,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-06-05 05:53:16,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1891. [2021-06-05 05:53:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1891 states, 1890 states have (on average 2.043915343915344) internal successors, (3863), 1890 states have internal predecessors, (3863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:16,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1891 states to 1891 states and 3863 transitions. [2021-06-05 05:53:16,174 INFO L78 Accepts]: Start accepts. Automaton has 1891 states and 3863 transitions. Word has length 40 [2021-06-05 05:53:16,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:16,175 INFO L482 AbstractCegarLoop]: Abstraction has 1891 states and 3863 transitions. [2021-06-05 05:53:16,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:16,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1891 states and 3863 transitions. [2021-06-05 05:53:16,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:53:16,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:16,176 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:16,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:16,377 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:16,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:16,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1041343209, now seen corresponding path program 247 times [2021-06-05 05:53:16,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:16,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166610514] [2021-06-05 05:53:16,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:16,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:16,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166610514] [2021-06-05 05:53:16,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166610514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:16,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802900802] [2021-06-05 05:53:16,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:16,749 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:53:16,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:17,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:17,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:17,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:17,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:17,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:17,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:17,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:53:17,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:17,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:17,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:17,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:53:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:17,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802900802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:17,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:17,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:53:17,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804119342] [2021-06-05 05:53:17,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:53:17,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:17,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:53:17,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:53:17,293 INFO L87 Difference]: Start difference. First operand 1891 states and 3863 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:18,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:18,531 INFO L93 Difference]: Finished difference Result 2091 states and 4219 transitions. [2021-06-05 05:53:18,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:53:18,532 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:53:18,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:18,533 INFO L225 Difference]: With dead ends: 2091 [2021-06-05 05:53:18,533 INFO L226 Difference]: Without dead ends: 2027 [2021-06-05 05:53:18,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1290.3ms TimeCoverageRelationStatistics Valid=234, Invalid=3072, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:53:18,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-06-05 05:53:18,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1906. [2021-06-05 05:53:18,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 2.0451443569553804) internal successors, (3896), 1905 states have internal predecessors, (3896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:18,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 3896 transitions. [2021-06-05 05:53:18,548 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 3896 transitions. Word has length 40 [2021-06-05 05:53:18,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:18,548 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 3896 transitions. [2021-06-05 05:53:18,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:18,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 3896 transitions. [2021-06-05 05:53:18,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:53:18,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:18,549 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:18,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-06-05 05:53:18,750 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:18,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:18,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1575048665, now seen corresponding path program 248 times [2021-06-05 05:53:18,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:18,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238834200] [2021-06-05 05:53:18,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:19,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:19,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238834200] [2021-06-05 05:53:19,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238834200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:19,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640350656] [2021-06-05 05:53:19,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:19,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:53:19,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:19,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:53:19,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:19,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:19,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:19,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:19,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:19,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:19,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:19,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:53:19,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:19,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:19,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:19,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:53:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:19,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640350656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:19,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:19,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:53:19,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244653607] [2021-06-05 05:53:19,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:53:19,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:19,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:53:19,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:53:19,662 INFO L87 Difference]: Start difference. First operand 1906 states and 3896 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:21,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:21,154 INFO L93 Difference]: Finished difference Result 2128 states and 4286 transitions. [2021-06-05 05:53:21,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:53:21,154 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:53:21,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:21,156 INFO L225 Difference]: With dead ends: 2128 [2021-06-05 05:53:21,156 INFO L226 Difference]: Without dead ends: 2064 [2021-06-05 05:53:21,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1291.0ms TimeCoverageRelationStatistics Valid=233, Invalid=3073, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:53:21,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2021-06-05 05:53:21,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1907. [2021-06-05 05:53:21,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1906 states have (on average 2.0451206715634838) internal successors, (3898), 1906 states have internal predecessors, (3898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:21,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 3898 transitions. [2021-06-05 05:53:21,170 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 3898 transitions. Word has length 40 [2021-06-05 05:53:21,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:21,170 INFO L482 AbstractCegarLoop]: Abstraction has 1907 states and 3898 transitions. [2021-06-05 05:53:21,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:21,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 3898 transitions. [2021-06-05 05:53:21,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:53:21,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:21,171 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:21,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:21,372 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:21,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:21,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1988883223, now seen corresponding path program 249 times [2021-06-05 05:53:21,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:21,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012439363] [2021-06-05 05:53:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:21,704 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:21,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:21,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012439363] [2021-06-05 05:53:21,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012439363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:21,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597554094] [2021-06-05 05:53:21,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:21,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:53:21,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:21,739 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:53:21,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:22,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:22,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:22,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:22,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:22,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:22,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:53:22,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:22,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:22,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:22,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:53:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:22,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597554094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:22,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:22,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 38 [2021-06-05 05:53:22,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912962030] [2021-06-05 05:53:22,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:53:22,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:22,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:53:22,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:53:22,301 INFO L87 Difference]: Start difference. First operand 1907 states and 3898 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:24,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:24,880 INFO L93 Difference]: Finished difference Result 2312 states and 4641 transitions. [2021-06-05 05:53:24,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:53:24,880 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:53:24,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:24,882 INFO L225 Difference]: With dead ends: 2312 [2021-06-05 05:53:24,882 INFO L226 Difference]: Without dead ends: 2180 [2021-06-05 05:53:24,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 2119.4ms TimeCoverageRelationStatistics Valid=438, Invalid=6042, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 05:53:24,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2021-06-05 05:53:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1933. [2021-06-05 05:53:24,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 2.046583850931677) internal successors, (3954), 1932 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:24,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 3954 transitions. [2021-06-05 05:53:24,897 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 3954 transitions. Word has length 40 [2021-06-05 05:53:24,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:24,897 INFO L482 AbstractCegarLoop]: Abstraction has 1933 states and 3954 transitions. [2021-06-05 05:53:24,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:24,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 3954 transitions. [2021-06-05 05:53:24,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:53:24,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:24,898 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:25,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:25,101 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:25,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:25,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1317318617, now seen corresponding path program 250 times [2021-06-05 05:53:25,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:25,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601545251] [2021-06-05 05:53:25,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:25,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:25,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601545251] [2021-06-05 05:53:25,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601545251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:25,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300791906] [2021-06-05 05:53:25,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:25,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:53:25,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:25,447 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:53:25,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:25,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:25,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:25,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:25,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:25,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:25,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:25,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:53:25,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:25,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:25,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:25,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:53:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:25,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300791906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:25,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:25,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:53:25,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789516867] [2021-06-05 05:53:25,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:53:25,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:25,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:53:25,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:53:25,991 INFO L87 Difference]: Start difference. First operand 1933 states and 3954 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:27,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:27,612 INFO L93 Difference]: Finished difference Result 2224 states and 4483 transitions. [2021-06-05 05:53:27,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:53:27,612 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:53:27,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:27,614 INFO L225 Difference]: With dead ends: 2224 [2021-06-05 05:53:27,614 INFO L226 Difference]: Without dead ends: 2163 [2021-06-05 05:53:27,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1412.3ms TimeCoverageRelationStatistics Valid=272, Invalid=3510, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:53:27,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-06-05 05:53:27,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1932. [2021-06-05 05:53:27,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.0466079751424133) internal successors, (3952), 1931 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:27,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 3952 transitions. [2021-06-05 05:53:27,629 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 3952 transitions. Word has length 40 [2021-06-05 05:53:27,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:27,629 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 3952 transitions. [2021-06-05 05:53:27,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:27,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 3952 transitions. [2021-06-05 05:53:27,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:53:27,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:27,630 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:27,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:27,833 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:27,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:27,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1592026089, now seen corresponding path program 251 times [2021-06-05 05:53:27,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:27,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504954333] [2021-06-05 05:53:27,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:28,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:28,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504954333] [2021-06-05 05:53:28,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504954333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:28,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623721419] [2021-06-05 05:53:28,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:28,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:53:28,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:28,180 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:53:28,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:28,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:28,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:28,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:28,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:28,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:28,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:53:28,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:28,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:28,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:28,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:53:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:28,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623721419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:28,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:28,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:53:28,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708921374] [2021-06-05 05:53:28,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:53:28,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:28,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:53:28,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:53:28,752 INFO L87 Difference]: Start difference. First operand 1932 states and 3952 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:30,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:30,526 INFO L93 Difference]: Finished difference Result 2264 states and 4568 transitions. [2021-06-05 05:53:30,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:53:30,526 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:53:30,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:30,528 INFO L225 Difference]: With dead ends: 2264 [2021-06-05 05:53:30,528 INFO L226 Difference]: Without dead ends: 2216 [2021-06-05 05:53:30,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 1615.5ms TimeCoverageRelationStatistics Valid=302, Invalid=3988, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:53:30,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-06-05 05:53:30,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 1936. [2021-06-05 05:53:30,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1935 states have (on average 2.046511627906977) internal successors, (3960), 1935 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:30,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 3960 transitions. [2021-06-05 05:53:30,543 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 3960 transitions. Word has length 40 [2021-06-05 05:53:30,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:30,543 INFO L482 AbstractCegarLoop]: Abstraction has 1936 states and 3960 transitions. [2021-06-05 05:53:30,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:30,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 3960 transitions. [2021-06-05 05:53:30,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:53:30,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:30,545 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:30,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:30,745 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:30,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:30,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2061830617, now seen corresponding path program 252 times [2021-06-05 05:53:30,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:30,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29061213] [2021-06-05 05:53:30,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:31,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:31,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29061213] [2021-06-05 05:53:31,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29061213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:31,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787519848] [2021-06-05 05:53:31,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:31,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:53:31,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:31,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:53:31,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:31,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:31,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:31,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:31,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:31,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:31,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:31,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:53:31,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:31,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:31,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:31,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:53:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:31,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787519848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:31,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:31,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:53:31,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328304100] [2021-06-05 05:53:31,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:53:31,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:31,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:53:31,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:53:31,604 INFO L87 Difference]: Start difference. First operand 1936 states and 3960 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:33,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:33,451 INFO L93 Difference]: Finished difference Result 2294 states and 4630 transitions. [2021-06-05 05:53:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:53:33,452 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:53:33,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:33,453 INFO L225 Difference]: With dead ends: 2294 [2021-06-05 05:53:33,453 INFO L226 Difference]: Without dead ends: 2262 [2021-06-05 05:53:33,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 1574.6ms TimeCoverageRelationStatistics Valid=333, Invalid=4223, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:53:33,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-06-05 05:53:33,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1937. [2021-06-05 05:53:33,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 2.0464876033057853) internal successors, (3962), 1936 states have internal predecessors, (3962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:33,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 3962 transitions. [2021-06-05 05:53:33,469 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 3962 transitions. Word has length 40 [2021-06-05 05:53:33,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:33,469 INFO L482 AbstractCegarLoop]: Abstraction has 1937 states and 3962 transitions. [2021-06-05 05:53:33,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:33,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 3962 transitions. [2021-06-05 05:53:33,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:53:33,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:33,470 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:33,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-05 05:53:33,673 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:33,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:33,673 INFO L82 PathProgramCache]: Analyzing trace with hash -806894313, now seen corresponding path program 253 times [2021-06-05 05:53:33,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:33,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230918483] [2021-06-05 05:53:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:33,995 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:33,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:33,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230918483] [2021-06-05 05:53:33,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230918483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:33,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807331275] [2021-06-05 05:53:33,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:34,018 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:53:34,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:34,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:34,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:34,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:34,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:34,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:53:34,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:34,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:34,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:34,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:53:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:34,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807331275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:34,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:34,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:53:34,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968446609] [2021-06-05 05:53:34,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:53:34,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:34,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:53:34,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:53:34,542 INFO L87 Difference]: Start difference. First operand 1937 states and 3962 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:36,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:36,650 INFO L93 Difference]: Finished difference Result 2370 states and 4777 transitions. [2021-06-05 05:53:36,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:53:36,650 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:53:36,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:36,652 INFO L225 Difference]: With dead ends: 2370 [2021-06-05 05:53:36,652 INFO L226 Difference]: Without dead ends: 2326 [2021-06-05 05:53:36,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 1831.8ms TimeCoverageRelationStatistics Valid=381, Invalid=5021, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:53:36,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2021-06-05 05:53:36,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 1929. [2021-06-05 05:53:36,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1928 states have (on average 2.0451244813278007) internal successors, (3943), 1928 states have internal predecessors, (3943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:36,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 3943 transitions. [2021-06-05 05:53:36,674 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 3943 transitions. Word has length 40 [2021-06-05 05:53:36,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:36,674 INFO L482 AbstractCegarLoop]: Abstraction has 1929 states and 3943 transitions. [2021-06-05 05:53:36,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:36,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 3943 transitions. [2021-06-05 05:53:36,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:53:36,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:36,676 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:36,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 05:53:36,876 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:36,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:36,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1668306179, now seen corresponding path program 254 times [2021-06-05 05:53:36,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:36,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258790159] [2021-06-05 05:53:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:37,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:37,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258790159] [2021-06-05 05:53:37,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258790159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:37,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136465337] [2021-06-05 05:53:37,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:37,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:53:37,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:37,239 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:53:37,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:37,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:37,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:37,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:37,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:37,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:37,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:37,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:53:37,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:37,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:37,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:37,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-06-05 05:53:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:37,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136465337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:37,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:37,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:53:37,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313462001] [2021-06-05 05:53:37,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:53:37,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:37,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:53:37,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:53:37,756 INFO L87 Difference]: Start difference. First operand 1929 states and 3943 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:39,068 INFO L93 Difference]: Finished difference Result 2132 states and 4333 transitions. [2021-06-05 05:53:39,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:53:39,068 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:53:39,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:39,070 INFO L225 Difference]: With dead ends: 2132 [2021-06-05 05:53:39,070 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 05:53:39,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1274.8ms TimeCoverageRelationStatistics Valid=239, Invalid=3183, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:53:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 05:53:39,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1924. [2021-06-05 05:53:39,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 2.045241809672387) internal successors, (3933), 1923 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:39,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 3933 transitions. [2021-06-05 05:53:39,084 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 3933 transitions. Word has length 40 [2021-06-05 05:53:39,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:39,084 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 3933 transitions. [2021-06-05 05:53:39,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:39,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 3933 transitions. [2021-06-05 05:53:39,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:53:39,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:39,086 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:39,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 05:53:39,286 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:39,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:39,286 INFO L82 PathProgramCache]: Analyzing trace with hash -73691179, now seen corresponding path program 255 times [2021-06-05 05:53:39,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:39,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917407939] [2021-06-05 05:53:39,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:39,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:39,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917407939] [2021-06-05 05:53:39,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917407939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:39,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249145409] [2021-06-05 05:53:39,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:39,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:53:39,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:39,635 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:53:39,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:40,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:40,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:40,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:40,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:40,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:40,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:53:40,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:40,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:40,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:40,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:53:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:40,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249145409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:40,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:40,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:53:40,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210953816] [2021-06-05 05:53:40,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:53:40,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:40,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:53:40,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:53:40,184 INFO L87 Difference]: Start difference. First operand 1924 states and 3933 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:41,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:41,934 INFO L93 Difference]: Finished difference Result 2145 states and 4329 transitions. [2021-06-05 05:53:41,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:53:41,934 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:53:41,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:41,936 INFO L225 Difference]: With dead ends: 2145 [2021-06-05 05:53:41,936 INFO L226 Difference]: Without dead ends: 2017 [2021-06-05 05:53:41,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 1589.7ms TimeCoverageRelationStatistics Valid=325, Invalid=4505, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:53:41,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-06-05 05:53:41,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1938. [2021-06-05 05:53:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 2.0464636035105834) internal successors, (3964), 1937 states have internal predecessors, (3964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:41,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 3964 transitions. [2021-06-05 05:53:41,950 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 3964 transitions. Word has length 40 [2021-06-05 05:53:41,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:41,950 INFO L482 AbstractCegarLoop]: Abstraction has 1938 states and 3964 transitions. [2021-06-05 05:53:41,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:41,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 3964 transitions. [2021-06-05 05:53:41,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:53:41,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:41,952 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:42,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 05:53:42,152 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:42,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:42,152 INFO L82 PathProgramCache]: Analyzing trace with hash 340143379, now seen corresponding path program 256 times [2021-06-05 05:53:42,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:42,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429291318] [2021-06-05 05:53:42,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:42,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:42,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429291318] [2021-06-05 05:53:42,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429291318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:42,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690419254] [2021-06-05 05:53:42,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:42,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:53:42,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:42,507 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:53:42,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:42,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:42,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:42,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:42,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:42,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:42,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:42,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:53:42,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:42,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:42,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:42,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:53:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:43,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690419254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:43,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:43,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:53:43,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131322559] [2021-06-05 05:53:43,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:53:43,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:43,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:53:43,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:53:43,035 INFO L87 Difference]: Start difference. First operand 1938 states and 3964 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:44,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:44,974 INFO L93 Difference]: Finished difference Result 2187 states and 4419 transitions. [2021-06-05 05:53:44,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:53:44,974 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:53:44,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:44,976 INFO L225 Difference]: With dead ends: 2187 [2021-06-05 05:53:44,976 INFO L226 Difference]: Without dead ends: 2064 [2021-06-05 05:53:44,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 1748.7ms TimeCoverageRelationStatistics Valid=359, Invalid=4611, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:53:44,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2021-06-05 05:53:44,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1941. [2021-06-05 05:53:44,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 2.044845360824742) internal successors, (3967), 1940 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 3967 transitions. [2021-06-05 05:53:44,990 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 3967 transitions. Word has length 40 [2021-06-05 05:53:44,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:44,990 INFO L482 AbstractCegarLoop]: Abstraction has 1941 states and 3967 transitions. [2021-06-05 05:53:44,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:44,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 3967 transitions. [2021-06-05 05:53:44,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:53:44,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:44,991 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:45,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 05:53:45,192 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:45,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:45,192 INFO L82 PathProgramCache]: Analyzing trace with hash -331421227, now seen corresponding path program 257 times [2021-06-05 05:53:45,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:45,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386931089] [2021-06-05 05:53:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:45,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:45,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386931089] [2021-06-05 05:53:45,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386931089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:45,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103651514] [2021-06-05 05:53:45,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:45,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:53:45,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:45,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:53:45,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:45,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:45,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:45,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:45,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:45,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:53:45,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:45,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:45,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:45,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:53:46,062 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:46,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103651514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:46,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:46,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:53:46,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104491443] [2021-06-05 05:53:46,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:53:46,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:46,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:53:46,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:53:46,063 INFO L87 Difference]: Start difference. First operand 1941 states and 3967 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:47,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:47,900 INFO L93 Difference]: Finished difference Result 2196 states and 4438 transitions. [2021-06-05 05:53:47,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:53:47,901 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:53:47,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:47,902 INFO L225 Difference]: With dead ends: 2196 [2021-06-05 05:53:47,902 INFO L226 Difference]: Without dead ends: 2100 [2021-06-05 05:53:47,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 1709.2ms TimeCoverageRelationStatistics Valid=390, Invalid=4580, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:53:47,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-06-05 05:53:47,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1942. [2021-06-05 05:53:47,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 2.044822256568779) internal successors, (3969), 1941 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:47,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 3969 transitions. [2021-06-05 05:53:47,916 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 3969 transitions. Word has length 40 [2021-06-05 05:53:47,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:47,916 INFO L482 AbstractCegarLoop]: Abstraction has 1942 states and 3969 transitions. [2021-06-05 05:53:47,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:47,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 3969 transitions. [2021-06-05 05:53:47,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:53:47,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:47,918 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:48,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:48,118 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:48,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:48,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1054201363, now seen corresponding path program 258 times [2021-06-05 05:53:48,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:48,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327454042] [2021-06-05 05:53:48,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:48,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:48,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327454042] [2021-06-05 05:53:48,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327454042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:48,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984586274] [2021-06-05 05:53:48,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:48,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:53:48,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:48,465 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:53:48,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:48,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:48,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:48,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:48,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:48,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:53:48,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:48,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:48,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:48,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:53:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:49,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984586274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:49,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:49,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 38 [2021-06-05 05:53:49,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175882065] [2021-06-05 05:53:49,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:53:49,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:49,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:53:49,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1360, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:53:49,017 INFO L87 Difference]: Start difference. First operand 1942 states and 3969 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:51,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:51,588 INFO L93 Difference]: Finished difference Result 2314 states and 4677 transitions. [2021-06-05 05:53:51,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 05:53:51,589 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:53:51,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:51,590 INFO L225 Difference]: With dead ends: 2314 [2021-06-05 05:53:51,590 INFO L226 Difference]: Without dead ends: 2226 [2021-06-05 05:53:51,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 2073.8ms TimeCoverageRelationStatistics Valid=497, Invalid=6145, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 05:53:51,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-05 05:53:51,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1956. [2021-06-05 05:53:51,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1955 states have (on average 2.0465473145780053) internal successors, (4001), 1955 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:51,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 4001 transitions. [2021-06-05 05:53:51,607 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 4001 transitions. Word has length 40 [2021-06-05 05:53:51,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:51,607 INFO L482 AbstractCegarLoop]: Abstraction has 1956 states and 4001 transitions. [2021-06-05 05:53:51,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:51,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 4001 transitions. [2021-06-05 05:53:51,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:53:51,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:51,608 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:51,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-05 05:53:51,809 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:51,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:51,809 INFO L82 PathProgramCache]: Analyzing trace with hash 413090773, now seen corresponding path program 259 times [2021-06-05 05:53:51,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:51,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935532117] [2021-06-05 05:53:51,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:52,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:52,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935532117] [2021-06-05 05:53:52,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935532117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:52,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769352578] [2021-06-05 05:53:52,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:52,156 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:53:52,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:52,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:52,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:52,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:52,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:52,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:53:52,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:52,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:52,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:52,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:53:52,684 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:52,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769352578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:52,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:52,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:53:52,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152053974] [2021-06-05 05:53:52,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:53:52,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:52,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:53:52,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:53:52,685 INFO L87 Difference]: Start difference. First operand 1956 states and 4001 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:55,243 INFO L93 Difference]: Finished difference Result 2340 states and 4735 transitions. [2021-06-05 05:53:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:53:55,244 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:53:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:55,245 INFO L225 Difference]: With dead ends: 2340 [2021-06-05 05:53:55,245 INFO L226 Difference]: Without dead ends: 2263 [2021-06-05 05:53:55,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 1955.4ms TimeCoverageRelationStatistics Valid=477, Invalid=5375, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:53:55,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-06-05 05:53:55,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 1966. [2021-06-05 05:53:55,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1965 states have (on average 2.0483460559796436) internal successors, (4025), 1965 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 4025 transitions. [2021-06-05 05:53:55,261 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 4025 transitions. Word has length 40 [2021-06-05 05:53:55,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:55,262 INFO L482 AbstractCegarLoop]: Abstraction has 1966 states and 4025 transitions. [2021-06-05 05:53:55,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:55,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 4025 transitions. [2021-06-05 05:53:55,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:53:55,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:55,263 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:55,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 05:53:55,464 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:55,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:55,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1839333139, now seen corresponding path program 260 times [2021-06-05 05:53:55,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:55,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385803889] [2021-06-05 05:53:55,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:55,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:55,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385803889] [2021-06-05 05:53:55,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385803889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:55,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761661289] [2021-06-05 05:53:55,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:55,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:53:55,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:55,848 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:53:55,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:56,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:56,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:56,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:56,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:56,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:56,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:56,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:53:56,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:56,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:56,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:56,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:53:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:56,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761661289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:56,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:56,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:53:56,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506135080] [2021-06-05 05:53:56,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:53:56,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:56,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:53:56,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1292, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:53:56,343 INFO L87 Difference]: Start difference. First operand 1966 states and 4025 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:59,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:59,154 INFO L93 Difference]: Finished difference Result 2414 states and 4889 transitions. [2021-06-05 05:53:59,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 05:53:59,154 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:53:59,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:59,156 INFO L225 Difference]: With dead ends: 2414 [2021-06-05 05:53:59,156 INFO L226 Difference]: Without dead ends: 2342 [2021-06-05 05:53:59,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 2109.7ms TimeCoverageRelationStatistics Valid=544, Invalid=6428, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 05:53:59,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-06-05 05:53:59,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1953. [2021-06-05 05:53:59,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.0466188524590163) internal successors, (3995), 1952 states have internal predecessors, (3995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:59,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 3995 transitions. [2021-06-05 05:53:59,171 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 3995 transitions. Word has length 40 [2021-06-05 05:53:59,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:59,171 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 3995 transitions. [2021-06-05 05:53:59,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:59,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 3995 transitions. [2021-06-05 05:53:59,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:53:59,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:59,173 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:53:59,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:59,373 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:59,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:59,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1814437583, now seen corresponding path program 261 times [2021-06-05 05:53:59,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:59,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284504839] [2021-06-05 05:53:59,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:59,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:59,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284504839] [2021-06-05 05:53:59,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284504839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:59,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112511313] [2021-06-05 05:53:59,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:59,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:53:59,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:59,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:53:59,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:00,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:00,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:00,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:00,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:00,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:54:00,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:00,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:00,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:00,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:16 [2021-06-05 05:54:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:00,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112511313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:00,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:00,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:54:00,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325110004] [2021-06-05 05:54:00,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:54:00,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:00,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:54:00,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:54:00,219 INFO L87 Difference]: Start difference. First operand 1953 states and 3995 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:01,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:01,976 INFO L93 Difference]: Finished difference Result 2145 states and 4351 transitions. [2021-06-05 05:54:01,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:54:01,977 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:54:01,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:01,978 INFO L225 Difference]: With dead ends: 2145 [2021-06-05 05:54:01,978 INFO L226 Difference]: Without dead ends: 2089 [2021-06-05 05:54:01,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1593.4ms TimeCoverageRelationStatistics Valid=349, Invalid=4763, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:54:01,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-06-05 05:54:01,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1948. [2021-06-05 05:54:01,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 2.046738572162301) internal successors, (3985), 1947 states have internal predecessors, (3985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:01,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 3985 transitions. [2021-06-05 05:54:01,993 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 3985 transitions. Word has length 40 [2021-06-05 05:54:01,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:01,993 INFO L482 AbstractCegarLoop]: Abstraction has 1948 states and 3985 transitions. [2021-06-05 05:54:01,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:01,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 3985 transitions. [2021-06-05 05:54:01,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:54:01,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:01,995 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:02,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-06-05 05:54:02,195 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:02,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:02,195 INFO L82 PathProgramCache]: Analyzing trace with hash -191281321, now seen corresponding path program 262 times [2021-06-05 05:54:02,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:02,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889862291] [2021-06-05 05:54:02,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:02,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:02,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889862291] [2021-06-05 05:54:02,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889862291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:02,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752343744] [2021-06-05 05:54:02,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:02,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:54:02,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:02,558 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:54:02,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:02,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:02,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:02,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:02,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:02,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:54:02,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:02,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:02,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:02,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:54:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:03,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752343744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:03,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:03,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:54:03,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864296374] [2021-06-05 05:54:03,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:54:03,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:03,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:54:03,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:54:03,093 INFO L87 Difference]: Start difference. First operand 1948 states and 3985 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:05,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:05,399 INFO L93 Difference]: Finished difference Result 2187 states and 4423 transitions. [2021-06-05 05:54:05,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:54:05,399 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:54:05,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:05,401 INFO L225 Difference]: With dead ends: 2187 [2021-06-05 05:54:05,401 INFO L226 Difference]: Without dead ends: 2067 [2021-06-05 05:54:05,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1910.8ms TimeCoverageRelationStatistics Valid=370, Invalid=5032, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:54:05,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-06-05 05:54:05,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1977. [2021-06-05 05:54:05,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1976 states have (on average 2.0445344129554655) internal successors, (4040), 1976 states have internal predecessors, (4040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:05,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 4040 transitions. [2021-06-05 05:54:05,417 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 4040 transitions. Word has length 40 [2021-06-05 05:54:05,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:05,417 INFO L482 AbstractCegarLoop]: Abstraction has 1977 states and 4040 transitions. [2021-06-05 05:54:05,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:05,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 4040 transitions. [2021-06-05 05:54:05,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:54:05,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:05,418 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:05,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:05,619 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:05,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:05,619 INFO L82 PathProgramCache]: Analyzing trace with hash -862845927, now seen corresponding path program 263 times [2021-06-05 05:54:05,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:05,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732668501] [2021-06-05 05:54:05,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:05,958 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:05,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:05,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732668501] [2021-06-05 05:54:05,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732668501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:05,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859404757] [2021-06-05 05:54:05,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:05,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:54:05,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:05,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:54:05,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:06,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:06,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:06,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:06,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:06,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:06,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:06,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:54:06,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:06,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:06,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:06,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:54:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:06,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859404757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:06,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:06,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:54:06,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49457715] [2021-06-05 05:54:06,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:54:06,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:06,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:54:06,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1296, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:54:06,510 INFO L87 Difference]: Start difference. First operand 1977 states and 4040 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:08,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:08,910 INFO L93 Difference]: Finished difference Result 2193 states and 4436 transitions. [2021-06-05 05:54:08,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:54:08,910 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:54:08,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:08,912 INFO L225 Difference]: With dead ends: 2193 [2021-06-05 05:54:08,912 INFO L226 Difference]: Without dead ends: 2097 [2021-06-05 05:54:08,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1990.4ms TimeCoverageRelationStatistics Valid=447, Invalid=5405, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:54:08,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-05 05:54:08,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1974. [2021-06-05 05:54:08,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 2.0446021287379623) internal successors, (4034), 1973 states have internal predecessors, (4034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:08,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 4034 transitions. [2021-06-05 05:54:08,926 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 4034 transitions. Word has length 40 [2021-06-05 05:54:08,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:08,926 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 4034 transitions. [2021-06-05 05:54:08,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:08,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 4034 transitions. [2021-06-05 05:54:08,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:54:08,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:08,928 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:09,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-06-05 05:54:09,128 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:09,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:09,128 INFO L82 PathProgramCache]: Analyzing trace with hash 522776663, now seen corresponding path program 264 times [2021-06-05 05:54:09,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:09,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555784546] [2021-06-05 05:54:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:09,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:09,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555784546] [2021-06-05 05:54:09,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555784546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:09,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465826051] [2021-06-05 05:54:09,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:09,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:54:09,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:09,485 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:54:09,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:10,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:10,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:10,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:10,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:10,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:54:10,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:10,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:10,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:10,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:54:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:10,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465826051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:10,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:10,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 40 [2021-06-05 05:54:10,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437427075] [2021-06-05 05:54:10,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 05:54:10,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:10,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 05:54:10,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1506, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:54:10,146 INFO L87 Difference]: Start difference. First operand 1974 states and 4034 transitions. Second operand has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:12,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:12,759 INFO L93 Difference]: Finished difference Result 2272 states and 4601 transitions. [2021-06-05 05:54:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 05:54:12,759 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:54:12,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:12,761 INFO L225 Difference]: With dead ends: 2272 [2021-06-05 05:54:12,761 INFO L226 Difference]: Without dead ends: 2184 [2021-06-05 05:54:12,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 2242.3ms TimeCoverageRelationStatistics Valid=547, Invalid=6593, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 05:54:12,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-06-05 05:54:12,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1964. [2021-06-05 05:54:12,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 2.0448293428425877) internal successors, (4014), 1963 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:12,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 4014 transitions. [2021-06-05 05:54:12,777 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 4014 transitions. Word has length 40 [2021-06-05 05:54:12,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:12,777 INFO L482 AbstractCegarLoop]: Abstraction has 1964 states and 4014 transitions. [2021-06-05 05:54:12,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 40 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:12,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 4014 transitions. [2021-06-05 05:54:12,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:54:12,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:12,778 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:12,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-05 05:54:12,979 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:12,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:12,979 INFO L82 PathProgramCache]: Analyzing trace with hash -118333927, now seen corresponding path program 265 times [2021-06-05 05:54:12,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:12,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489341976] [2021-06-05 05:54:12,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:13,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:13,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489341976] [2021-06-05 05:54:13,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489341976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:13,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436203060] [2021-06-05 05:54:13,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:13,333 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:54:13,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:13,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:13,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:13,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:13,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:13,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:54:13,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:13,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:13,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:13,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:54:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:13,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436203060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:13,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:13,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:54:13,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555685365] [2021-06-05 05:54:13,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:54:13,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:13,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:54:13,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:54:13,839 INFO L87 Difference]: Start difference. First operand 1964 states and 4014 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:16,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:16,421 INFO L93 Difference]: Finished difference Result 2294 states and 4646 transitions. [2021-06-05 05:54:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 05:54:16,421 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:54:16,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:16,423 INFO L225 Difference]: With dead ends: 2294 [2021-06-05 05:54:16,423 INFO L226 Difference]: Without dead ends: 2230 [2021-06-05 05:54:16,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 2177.5ms TimeCoverageRelationStatistics Valid=585, Invalid=6387, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 05:54:16,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-06-05 05:54:16,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 1968. [2021-06-05 05:54:16,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1967 states have (on average 2.044738179969497) internal successors, (4022), 1967 states have internal predecessors, (4022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 4022 transitions. [2021-06-05 05:54:16,439 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 4022 transitions. Word has length 40 [2021-06-05 05:54:16,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:16,439 INFO L482 AbstractCegarLoop]: Abstraction has 1968 states and 4022 transitions. [2021-06-05 05:54:16,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:16,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 4022 transitions. [2021-06-05 05:54:16,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:54:16,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:16,440 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:16,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:16,641 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:16,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:16,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1307908439, now seen corresponding path program 266 times [2021-06-05 05:54:16,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:16,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752642402] [2021-06-05 05:54:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:16,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:16,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752642402] [2021-06-05 05:54:16,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752642402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:16,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419977554] [2021-06-05 05:54:16,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:16,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:54:16,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:16,995 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:54:16,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:17,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:17,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:17,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:17,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:17,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:17,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:17,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:54:17,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:17,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:17,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:17,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:54:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:17,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419977554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:17,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:17,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:54:17,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537086583] [2021-06-05 05:54:17,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:54:17,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:17,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:54:17,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:54:17,497 INFO L87 Difference]: Start difference. First operand 1968 states and 4022 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:20,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:20,831 INFO L93 Difference]: Finished difference Result 2397 states and 4852 transitions. [2021-06-05 05:54:20,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 05:54:20,831 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:54:20,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:20,833 INFO L225 Difference]: With dead ends: 2397 [2021-06-05 05:54:20,833 INFO L226 Difference]: Without dead ends: 2325 [2021-06-05 05:54:20,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2571 ImplicationChecksByTransitivity, 2554.5ms TimeCoverageRelationStatistics Valid=721, Invalid=8591, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 05:54:20,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2021-06-05 05:54:20,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 1958. [2021-06-05 05:54:20,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1957 states have (on average 2.044455799693408) internal successors, (4001), 1957 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:20,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 4001 transitions. [2021-06-05 05:54:20,849 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 4001 transitions. Word has length 40 [2021-06-05 05:54:20,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:20,849 INFO L482 AbstractCegarLoop]: Abstraction has 1958 states and 4001 transitions. [2021-06-05 05:54:20,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:20,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 4001 transitions. [2021-06-05 05:54:20,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:54:20,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:20,850 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:21,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 05:54:21,051 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:21,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:21,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1107719133, now seen corresponding path program 267 times [2021-06-05 05:54:21,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:21,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256506376] [2021-06-05 05:54:21,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:21,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:21,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256506376] [2021-06-05 05:54:21,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256506376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:21,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900175157] [2021-06-05 05:54:21,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:21,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:54:21,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:21,401 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:54:21,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:21,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:21,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:21,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:21,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:21,849 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-06-05 05:54:21,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 26 [2021-06-05 05:54:21,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:21,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:21,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:21,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:69, output treesize:24 [2021-06-05 05:54:22,190 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:22,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900175157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:22,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:22,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 40 [2021-06-05 05:54:22,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637600282] [2021-06-05 05:54:22,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 05:54:22,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:22,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 05:54:22,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:54:22,191 INFO L87 Difference]: Start difference. First operand 1958 states and 4001 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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) [2021-06-05 05:54:24,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:24,921 INFO L93 Difference]: Finished difference Result 2160 states and 4375 transitions. [2021-06-05 05:54:24,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:54:24,922 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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 40 [2021-06-05 05:54:24,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:24,923 INFO L225 Difference]: With dead ends: 2160 [2021-06-05 05:54:24,923 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 05:54:24,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 2434.9ms TimeCoverageRelationStatistics Valid=416, Invalid=6064, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 05:54:24,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 05:54:24,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1943. [2021-06-05 05:54:24,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1943 states, 1942 states have (on average 2.044799176107106) internal successors, (3971), 1942 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:24,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 3971 transitions. [2021-06-05 05:54:24,938 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 3971 transitions. Word has length 40 [2021-06-05 05:54:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:24,938 INFO L482 AbstractCegarLoop]: Abstraction has 1943 states and 3971 transitions. [2021-06-05 05:54:24,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 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) [2021-06-05 05:54:24,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 3971 transitions. [2021-06-05 05:54:24,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:54:24,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:24,939 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:25,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:25,140 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:25,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:25,140 INFO L82 PathProgramCache]: Analyzing trace with hash 2088211861, now seen corresponding path program 268 times [2021-06-05 05:54:25,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:25,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031270640] [2021-06-05 05:54:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:25,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:25,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031270640] [2021-06-05 05:54:25,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031270640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:25,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60724118] [2021-06-05 05:54:25,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:25,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:54:25,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:25,496 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:54:25,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:25,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:25,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:25,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:25,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:25,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:25,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:25,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:54:25,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:25,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:25,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:25,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:54:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:26,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60724118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:26,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:26,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:54:26,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878790546] [2021-06-05 05:54:26,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:54:26,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:26,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:54:26,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1296, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:54:26,030 INFO L87 Difference]: Start difference. First operand 1943 states and 3971 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:27,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:27,847 INFO L93 Difference]: Finished difference Result 2164 states and 4371 transitions. [2021-06-05 05:54:27,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:54:27,847 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:54:27,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:27,849 INFO L225 Difference]: With dead ends: 2164 [2021-06-05 05:54:27,849 INFO L226 Difference]: Without dead ends: 2068 [2021-06-05 05:54:27,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1634.4ms TimeCoverageRelationStatistics Valid=353, Invalid=4617, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:54:27,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2021-06-05 05:54:27,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1961. [2021-06-05 05:54:27,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 2.044387755102041) internal successors, (4007), 1960 states have internal predecessors, (4007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:27,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 4007 transitions. [2021-06-05 05:54:27,863 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 4007 transitions. Word has length 40 [2021-06-05 05:54:27,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:27,864 INFO L482 AbstractCegarLoop]: Abstraction has 1961 states and 4007 transitions. [2021-06-05 05:54:27,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:27,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 4007 transitions. [2021-06-05 05:54:27,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:54:27,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:27,865 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:28,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:28,065 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:28,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:28,066 INFO L82 PathProgramCache]: Analyzing trace with hash -821132845, now seen corresponding path program 269 times [2021-06-05 05:54:28,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:28,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505757097] [2021-06-05 05:54:28,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:28,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:28,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505757097] [2021-06-05 05:54:28,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505757097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:28,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949182395] [2021-06-05 05:54:28,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:28,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:54:28,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:28,424 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:54:28,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:28,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:28,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:28,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:28,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:28,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:28,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:54:28,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:28,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:28,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:28,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:54:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:29,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949182395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:29,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:29,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2021-06-05 05:54:29,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012681907] [2021-06-05 05:54:29,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 05:54:29,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:29,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 05:54:29,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1435, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:54:29,011 INFO L87 Difference]: Start difference. First operand 1961 states and 4007 transitions. Second operand has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:30,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:30,931 INFO L93 Difference]: Finished difference Result 2198 states and 4445 transitions. [2021-06-05 05:54:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:54:30,931 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:54:30,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:30,933 INFO L225 Difference]: With dead ends: 2198 [2021-06-05 05:54:30,933 INFO L226 Difference]: Without dead ends: 2110 [2021-06-05 05:54:30,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1721.2ms TimeCoverageRelationStatistics Valid=381, Invalid=4875, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:54:30,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-06-05 05:54:30,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1961. [2021-06-05 05:54:30,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 2.044387755102041) internal successors, (4007), 1960 states have internal predecessors, (4007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 4007 transitions. [2021-06-05 05:54:30,948 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 4007 transitions. Word has length 40 [2021-06-05 05:54:30,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:30,948 INFO L482 AbstractCegarLoop]: Abstraction has 1961 states and 4007 transitions. [2021-06-05 05:54:30,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:30,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 4007 transitions. [2021-06-05 05:54:30,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:54:30,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:30,949 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:31,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:31,150 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:31,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:31,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1462243435, now seen corresponding path program 270 times [2021-06-05 05:54:31,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:31,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706440412] [2021-06-05 05:54:31,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:31,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:31,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706440412] [2021-06-05 05:54:31,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706440412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:31,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113874751] [2021-06-05 05:54:31,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:31,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:54:31,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:31,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:54:31,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:31,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:31,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:31,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:31,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:31,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:54:31,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:31,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:31,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:31,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:54:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:31,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113874751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:31,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:31,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:54:31,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233108437] [2021-06-05 05:54:31,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:54:31,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:31,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:54:31,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1283, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:54:31,990 INFO L87 Difference]: Start difference. First operand 1961 states and 4007 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:33,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:33,873 INFO L93 Difference]: Finished difference Result 2202 states and 4455 transitions. [2021-06-05 05:54:33,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:54:33,873 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:54:33,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:33,875 INFO L225 Difference]: With dead ends: 2202 [2021-06-05 05:54:33,875 INFO L226 Difference]: Without dead ends: 2138 [2021-06-05 05:54:33,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 1677.6ms TimeCoverageRelationStatistics Valid=423, Invalid=4979, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:54:33,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-05 05:54:33,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1965. [2021-06-05 05:54:33,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 2.044297352342159) internal successors, (4015), 1964 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:33,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 4015 transitions. [2021-06-05 05:54:33,890 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 4015 transitions. Word has length 40 [2021-06-05 05:54:33,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:33,890 INFO L482 AbstractCegarLoop]: Abstraction has 1965 states and 4015 transitions. [2021-06-05 05:54:33,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:33,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 4015 transitions. [2021-06-05 05:54:33,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:54:33,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:33,891 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:34,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-06-05 05:54:34,092 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:34,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:34,092 INFO L82 PathProgramCache]: Analyzing trace with hash -36001069, now seen corresponding path program 271 times [2021-06-05 05:54:34,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:34,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351692995] [2021-06-05 05:54:34,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:34,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:34,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351692995] [2021-06-05 05:54:34,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351692995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:34,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259015280] [2021-06-05 05:54:34,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:34,441 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:54:34,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:34,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:34,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:34,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:34,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:34,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:34,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:54:34,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:34,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:34,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:34,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:54:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:34,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259015280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:34,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:34,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:54:34,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850200141] [2021-06-05 05:54:34,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:54:34,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:34,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:54:34,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1284, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:54:34,933 INFO L87 Difference]: Start difference. First operand 1965 states and 4015 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:37,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:37,378 INFO L93 Difference]: Finished difference Result 2307 states and 4660 transitions. [2021-06-05 05:54:37,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 05:54:37,379 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:54:37,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:37,381 INFO L225 Difference]: With dead ends: 2307 [2021-06-05 05:54:37,381 INFO L226 Difference]: Without dead ends: 2223 [2021-06-05 05:54:37,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1972 ImplicationChecksByTransitivity, 2012.4ms TimeCoverageRelationStatistics Valid=550, Invalid=6590, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 05:54:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-06-05 05:54:37,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1959. [2021-06-05 05:54:37,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1958 states have (on average 2.0444330949948926) internal successors, (4003), 1958 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 4003 transitions. [2021-06-05 05:54:37,396 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 4003 transitions. Word has length 40 [2021-06-05 05:54:37,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:37,396 INFO L482 AbstractCegarLoop]: Abstraction has 1959 states and 4003 transitions. [2021-06-05 05:54:37,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:37,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 4003 transitions. [2021-06-05 05:54:37,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:54:37,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:37,398 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:37,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 05:54:37,598 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:37,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:37,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1841346823, now seen corresponding path program 272 times [2021-06-05 05:54:37,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:37,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994612602] [2021-06-05 05:54:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:37,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:37,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994612602] [2021-06-05 05:54:37,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994612602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:37,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418316380] [2021-06-05 05:54:37,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:37,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:54:37,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:37,944 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:54:37,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:38,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:38,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:38,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:38,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:38,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:38,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:54:38,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:38,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:38,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:38,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:54:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:38,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418316380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:38,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:38,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:54:38,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889294912] [2021-06-05 05:54:38,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:54:38,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:38,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:54:38,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:54:38,486 INFO L87 Difference]: Start difference. First operand 1959 states and 4003 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:40,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:40,007 INFO L93 Difference]: Finished difference Result 2185 states and 4410 transitions. [2021-06-05 05:54:40,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:54:40,008 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:54:40,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:40,010 INFO L225 Difference]: With dead ends: 2185 [2021-06-05 05:54:40,010 INFO L226 Difference]: Without dead ends: 2057 [2021-06-05 05:54:40,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 1548.1ms TimeCoverageRelationStatistics Valid=314, Invalid=4378, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:54:40,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2021-06-05 05:54:40,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 1970. [2021-06-05 05:54:40,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 2.0462163534789233) internal successors, (4029), 1969 states have internal predecessors, (4029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:40,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 4029 transitions. [2021-06-05 05:54:40,024 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 4029 transitions. Word has length 40 [2021-06-05 05:54:40,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:40,024 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 4029 transitions. [2021-06-05 05:54:40,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:40,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 4029 transitions. [2021-06-05 05:54:40,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:54:40,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:40,026 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:40,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-05 05:54:40,226 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:40,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:40,226 INFO L82 PathProgramCache]: Analyzing trace with hash -2039785915, now seen corresponding path program 273 times [2021-06-05 05:54:40,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:40,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579055032] [2021-06-05 05:54:40,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:40,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:40,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579055032] [2021-06-05 05:54:40,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579055032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:40,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118310577] [2021-06-05 05:54:40,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:40,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:54:40,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:40,578 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:54:40,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:40,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:40,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:40,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:40,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:40,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:54:40,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:41,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:41,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:41,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:54:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:41,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118310577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:41,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:41,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 38 [2021-06-05 05:54:41,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97636] [2021-06-05 05:54:41,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:54:41,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:41,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:54:41,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:54:41,116 INFO L87 Difference]: Start difference. First operand 1970 states and 4029 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:43,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:43,143 INFO L93 Difference]: Finished difference Result 2249 states and 4548 transitions. [2021-06-05 05:54:43,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:54:43,143 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:54:43,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:43,145 INFO L225 Difference]: With dead ends: 2249 [2021-06-05 05:54:43,145 INFO L226 Difference]: Without dead ends: 2125 [2021-06-05 05:54:43,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 1956.9ms TimeCoverageRelationStatistics Valid=417, Invalid=5589, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 05:54:43,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2021-06-05 05:54:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 1986. [2021-06-05 05:54:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 2.045340050377834) internal successors, (4060), 1985 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 4060 transitions. [2021-06-05 05:54:43,159 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 4060 transitions. Word has length 40 [2021-06-05 05:54:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:43,159 INFO L482 AbstractCegarLoop]: Abstraction has 1986 states and 4060 transitions. [2021-06-05 05:54:43,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:43,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 4060 transitions. [2021-06-05 05:54:43,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:54:43,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:43,161 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:43,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-05 05:54:43,361 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:43,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:43,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1583616775, now seen corresponding path program 274 times [2021-06-05 05:54:43,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:43,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021591684] [2021-06-05 05:54:43,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:43,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:43,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021591684] [2021-06-05 05:54:43,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021591684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:43,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605341538] [2021-06-05 05:54:43,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:43,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:54:43,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:43,718 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:54:43,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:44,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:44,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:44,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:44,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:44,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:44,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:44,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:54:44,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:44,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:44,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:44,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:54:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:44,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605341538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:44,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:44,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:54:44,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47208851] [2021-06-05 05:54:44,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:54:44,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:44,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:54:44,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1293, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:54:44,245 INFO L87 Difference]: Start difference. First operand 1986 states and 4060 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:47,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:47,074 INFO L93 Difference]: Finished difference Result 2338 states and 4730 transitions. [2021-06-05 05:54:47,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 05:54:47,074 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:54:47,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:47,076 INFO L225 Difference]: With dead ends: 2338 [2021-06-05 05:54:47,076 INFO L226 Difference]: Without dead ends: 2225 [2021-06-05 05:54:47,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2262 ImplicationChecksByTransitivity, 2408.7ms TimeCoverageRelationStatistics Valid=629, Invalid=7561, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 05:54:47,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-06-05 05:54:47,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2006. [2021-06-05 05:54:47,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 2.0458852867830424) internal successors, (4102), 2005 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:47,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 4102 transitions. [2021-06-05 05:54:47,091 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 4102 transitions. Word has length 40 [2021-06-05 05:54:47,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:47,091 INFO L482 AbstractCegarLoop]: Abstraction has 2006 states and 4102 transitions. [2021-06-05 05:54:47,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:47,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 4102 transitions. [2021-06-05 05:54:47,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:54:47,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:47,093 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:47,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:47,293 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:47,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:47,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1325727931, now seen corresponding path program 275 times [2021-06-05 05:54:47,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:47,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000032260] [2021-06-05 05:54:47,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:47,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:47,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000032260] [2021-06-05 05:54:47,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000032260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:47,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972161836] [2021-06-05 05:54:47,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:47,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:54:47,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:47,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:54:47,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:48,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:48,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:48,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:48,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:48,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:48,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:48,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:54:48,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:48,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:48,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:48,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:54:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:48,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972161836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:48,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:48,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:54:48,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980013868] [2021-06-05 05:54:48,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:54:48,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:48,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:54:48,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:54:48,167 INFO L87 Difference]: Start difference. First operand 2006 states and 4102 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:51,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:51,420 INFO L93 Difference]: Finished difference Result 2420 states and 4895 transitions. [2021-06-05 05:54:51,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 05:54:51,420 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:54:51,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:51,422 INFO L225 Difference]: With dead ends: 2420 [2021-06-05 05:54:51,422 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 05:54:51,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 2514.1ms TimeCoverageRelationStatistics Valid=632, Invalid=7740, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 05:54:51,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 05:54:51,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2014. [2021-06-05 05:54:51,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2014 states, 2013 states have (on average 2.046199701937407) internal successors, (4119), 2013 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:51,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2014 states to 2014 states and 4119 transitions. [2021-06-05 05:54:51,438 INFO L78 Accepts]: Start accepts. Automaton has 2014 states and 4119 transitions. Word has length 40 [2021-06-05 05:54:51,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:51,438 INFO L482 AbstractCegarLoop]: Abstraction has 2014 states and 4119 transitions. [2021-06-05 05:54:51,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:51,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2014 states and 4119 transitions. [2021-06-05 05:54:51,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:54:51,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:51,439 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:51,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:51,640 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:51,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:51,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1966838521, now seen corresponding path program 276 times [2021-06-05 05:54:51,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:51,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107701305] [2021-06-05 05:54:51,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:51,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:51,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107701305] [2021-06-05 05:54:51,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107701305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:51,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863042043] [2021-06-05 05:54:51,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:52,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:54:52,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:52,002 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:54:52,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:52,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:52,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:52,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:52,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:52,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:54:52,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:52,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:52,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:52,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:54:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:52,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863042043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:52,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:52,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:54:52,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271858194] [2021-06-05 05:54:52,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:54:52,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:52,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:54:52,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1293, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:54:52,514 INFO L87 Difference]: Start difference. First operand 2014 states and 4119 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:55,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:55,273 INFO L93 Difference]: Finished difference Result 2443 states and 4944 transitions. [2021-06-05 05:54:55,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 05:54:55,273 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:54:55,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:55,275 INFO L225 Difference]: With dead ends: 2443 [2021-06-05 05:54:55,275 INFO L226 Difference]: Without dead ends: 2379 [2021-06-05 05:54:55,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 2417.1ms TimeCoverageRelationStatistics Valid=649, Invalid=7541, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 05:54:55,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2021-06-05 05:54:55,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 2018. [2021-06-05 05:54:55,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.0461080813088746) internal successors, (4127), 2017 states have internal predecessors, (4127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 4127 transitions. [2021-06-05 05:54:55,291 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 4127 transitions. Word has length 40 [2021-06-05 05:54:55,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:55,291 INFO L482 AbstractCegarLoop]: Abstraction has 2018 states and 4127 transitions. [2021-06-05 05:54:55,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 4127 transitions. [2021-06-05 05:54:55,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:54:55,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:55,292 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:54:55,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 05:54:55,493 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:55,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:55,493 INFO L82 PathProgramCache]: Analyzing trace with hash -540596155, now seen corresponding path program 277 times [2021-06-05 05:54:55,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:55,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237233041] [2021-06-05 05:54:55,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:55,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:55,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237233041] [2021-06-05 05:54:55,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237233041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:55,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44724023] [2021-06-05 05:54:55,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:55,828 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:54:55,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:56,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:56,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:56,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:56,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:56,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:56,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:54:56,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:56,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:56,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:56,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:54:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:56,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44724023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:56,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:56,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:54:56,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931605155] [2021-06-05 05:54:56,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:54:56,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:56,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:54:56,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:54:56,346 INFO L87 Difference]: Start difference. First operand 2018 states and 4127 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:00,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:00,013 INFO L93 Difference]: Finished difference Result 2547 states and 5153 transitions. [2021-06-05 05:55:00,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 05:55:00,014 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:55:00,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:00,016 INFO L225 Difference]: With dead ends: 2547 [2021-06-05 05:55:00,016 INFO L226 Difference]: Without dead ends: 2475 [2021-06-05 05:55:00,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2953 ImplicationChecksByTransitivity, 2724.1ms TimeCoverageRelationStatistics Valid=765, Invalid=9537, Unknown=0, NotChecked=0, Total=10302 [2021-06-05 05:55:00,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2021-06-05 05:55:00,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 2009. [2021-06-05 05:55:00,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 2.0453187250996017) internal successors, (4107), 2008 states have internal predecessors, (4107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:00,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 4107 transitions. [2021-06-05 05:55:00,032 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 4107 transitions. Word has length 40 [2021-06-05 05:55:00,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:00,032 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 4107 transitions. [2021-06-05 05:55:00,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:00,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 4107 transitions. [2021-06-05 05:55:00,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:55:00,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:00,034 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:00,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 05:55:00,234 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:00,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:00,234 INFO L82 PathProgramCache]: Analyzing trace with hash -565491711, now seen corresponding path program 278 times [2021-06-05 05:55:00,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:00,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652066140] [2021-06-05 05:55:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:00,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:00,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652066140] [2021-06-05 05:55:00,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652066140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:00,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623789344] [2021-06-05 05:55:00,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:00,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:55:00,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:00,587 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:55:00,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:00,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:00,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:00,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:00,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:00,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:00,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:55:00,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:55:00,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:00,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:00,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:55:00,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-06-05 05:55:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:01,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623789344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:01,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:01,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:55:01,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212683372] [2021-06-05 05:55:01,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:55:01,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:01,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:55:01,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:55:01,109 INFO L87 Difference]: Start difference. First operand 2009 states and 4107 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:02,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:02,878 INFO L93 Difference]: Finished difference Result 2200 states and 4458 transitions. [2021-06-05 05:55:02,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:55:02,878 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:55:02,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:02,880 INFO L225 Difference]: With dead ends: 2200 [2021-06-05 05:55:02,880 INFO L226 Difference]: Without dead ends: 2144 [2021-06-05 05:55:02,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 1618.2ms TimeCoverageRelationStatistics Valid=339, Invalid=4631, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:55:02,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-06-05 05:55:02,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 2004. [2021-06-05 05:55:02,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 2.0454318522216677) internal successors, (4097), 2003 states have internal predecessors, (4097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:02,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 4097 transitions. [2021-06-05 05:55:02,895 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 4097 transitions. Word has length 40 [2021-06-05 05:55:02,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:02,895 INFO L482 AbstractCegarLoop]: Abstraction has 2004 states and 4097 transitions. [2021-06-05 05:55:02,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:02,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 4097 transitions. [2021-06-05 05:55:02,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:55:02,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:02,896 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:03,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2021-06-05 05:55:03,097 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:03,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:03,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1723756681, now seen corresponding path program 279 times [2021-06-05 05:55:03,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:03,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727817007] [2021-06-05 05:55:03,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:03,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:03,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727817007] [2021-06-05 05:55:03,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727817007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:03,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767754643] [2021-06-05 05:55:03,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:03,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:55:03,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:03,469 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:55:03,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:03,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:03,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:03,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:03,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:55:03,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:03,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:55:03,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:03,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:03,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:55:03,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:55:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:04,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767754643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:04,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:04,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 38 [2021-06-05 05:55:04,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114251813] [2021-06-05 05:55:04,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:55:04,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:04,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:55:04,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:55:04,070 INFO L87 Difference]: Start difference. First operand 2004 states and 4097 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:06,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:06,134 INFO L93 Difference]: Finished difference Result 2252 states and 4554 transitions. [2021-06-05 05:55:06,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:55:06,135 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:55:06,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:06,136 INFO L225 Difference]: With dead ends: 2252 [2021-06-05 05:55:06,136 INFO L226 Difference]: Without dead ends: 2132 [2021-06-05 05:55:06,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 1958.9ms TimeCoverageRelationStatistics Valid=356, Invalid=5046, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:55:06,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2021-06-05 05:55:06,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 2032. [2021-06-05 05:55:06,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 2.046774987690793) internal successors, (4157), 2031 states have internal predecessors, (4157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:06,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 4157 transitions. [2021-06-05 05:55:06,161 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 4157 transitions. Word has length 40 [2021-06-05 05:55:06,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:06,161 INFO L482 AbstractCegarLoop]: Abstraction has 2032 states and 4157 transitions. [2021-06-05 05:55:06,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:06,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 4157 transitions. [2021-06-05 05:55:06,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:55:06,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:06,162 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:06,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:06,363 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:06,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:06,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1052192075, now seen corresponding path program 280 times [2021-06-05 05:55:06,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:06,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524894641] [2021-06-05 05:55:06,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:06,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:06,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524894641] [2021-06-05 05:55:06,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524894641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:06,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029814119] [2021-06-05 05:55:06,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:06,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:55:06,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:06,738 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:55:06,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:07,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:07,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:07,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:07,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:07,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:07,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:55:07,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:55:07,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:07,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:07,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:55:07,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:55:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:07,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029814119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:07,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:07,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:55:07,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346079163] [2021-06-05 05:55:07,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:55:07,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:07,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:55:07,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:55:07,282 INFO L87 Difference]: Start difference. First operand 2032 states and 4157 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:09,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:09,822 INFO L93 Difference]: Finished difference Result 2286 states and 4630 transitions. [2021-06-05 05:55:09,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 05:55:09,822 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:55:09,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:09,823 INFO L225 Difference]: With dead ends: 2286 [2021-06-05 05:55:09,824 INFO L226 Difference]: Without dead ends: 2178 [2021-06-05 05:55:09,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 2277.2ms TimeCoverageRelationStatistics Valid=510, Invalid=6630, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 05:55:09,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2021-06-05 05:55:09,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 2039. [2021-06-05 05:55:09,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2038 states have (on average 2.0466143277723257) internal successors, (4171), 2038 states have internal predecessors, (4171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:09,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 4171 transitions. [2021-06-05 05:55:09,838 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 4171 transitions. Word has length 40 [2021-06-05 05:55:09,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:09,839 INFO L482 AbstractCegarLoop]: Abstraction has 2039 states and 4171 transitions. [2021-06-05 05:55:09,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:09,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 4171 transitions. [2021-06-05 05:55:09,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:55:09,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:09,840 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:10,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-05 05:55:10,041 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:10,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:10,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1857152631, now seen corresponding path program 281 times [2021-06-05 05:55:10,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:10,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999972462] [2021-06-05 05:55:10,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:10,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:10,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999972462] [2021-06-05 05:55:10,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999972462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:10,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316989287] [2021-06-05 05:55:10,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:10,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:55:10,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:10,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:55:10,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:10,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:55:10,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:10,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:10,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:10,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:55:10,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:10,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:10,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:55:10,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:55:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:10,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316989287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:10,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:10,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:55:10,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322711723] [2021-06-05 05:55:10,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:55:10,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:10,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:55:10,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:55:10,927 INFO L87 Difference]: Start difference. First operand 2039 states and 4171 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:14,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:14,201 INFO L93 Difference]: Finished difference Result 2358 states and 4779 transitions. [2021-06-05 05:55:14,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 05:55:14,201 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:55:14,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:14,203 INFO L225 Difference]: With dead ends: 2358 [2021-06-05 05:55:14,203 INFO L226 Difference]: Without dead ends: 2270 [2021-06-05 05:55:14,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1977 ImplicationChecksByTransitivity, 2543.5ms TimeCoverageRelationStatistics Valid=555, Invalid=7101, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 05:55:14,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-06-05 05:55:14,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 2041. [2021-06-05 05:55:14,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 2.0470588235294116) internal successors, (4176), 2040 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:14,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 4176 transitions. [2021-06-05 05:55:14,221 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 4176 transitions. Word has length 40 [2021-06-05 05:55:14,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:14,221 INFO L482 AbstractCegarLoop]: Abstraction has 2041 states and 4176 transitions. [2021-06-05 05:55:14,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:14,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 4176 transitions. [2021-06-05 05:55:14,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:55:14,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:14,222 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:14,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 05:55:14,423 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:14,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:14,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1796704075, now seen corresponding path program 282 times [2021-06-05 05:55:14,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:14,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393190642] [2021-06-05 05:55:14,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:14,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:14,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393190642] [2021-06-05 05:55:14,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393190642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:14,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346470791] [2021-06-05 05:55:14,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:14,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:55:14,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:14,788 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:55:14,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:15,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:15,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:15,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:15,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:15,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:55:15,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:55:15,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:15,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:15,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:55:15,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:55:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:15,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346470791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:15,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:15,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:55:15,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874713381] [2021-06-05 05:55:15,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:55:15,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:15,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:55:15,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1290, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:55:15,326 INFO L87 Difference]: Start difference. First operand 2041 states and 4176 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:18,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:18,164 INFO L93 Difference]: Finished difference Result 2389 states and 4844 transitions. [2021-06-05 05:55:18,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 05:55:18,164 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:55:18,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:18,166 INFO L225 Difference]: With dead ends: 2389 [2021-06-05 05:55:18,166 INFO L226 Difference]: Without dead ends: 2325 [2021-06-05 05:55:18,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2249 ImplicationChecksByTransitivity, 2461.1ms TimeCoverageRelationStatistics Valid=634, Invalid=7556, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 05:55:18,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2021-06-05 05:55:18,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 2045. [2021-06-05 05:55:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 2.0469667318982387) internal successors, (4184), 2044 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 4184 transitions. [2021-06-05 05:55:18,182 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 4184 transitions. Word has length 40 [2021-06-05 05:55:18,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:18,182 INFO L482 AbstractCegarLoop]: Abstraction has 2045 states and 4184 transitions. [2021-06-05 05:55:18,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:18,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 4184 transitions. [2021-06-05 05:55:18,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:55:18,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:18,184 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:18,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-06-05 05:55:18,384 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:18,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:18,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1072020855, now seen corresponding path program 283 times [2021-06-05 05:55:18,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:18,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201026287] [2021-06-05 05:55:18,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:18,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:18,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201026287] [2021-06-05 05:55:18,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201026287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:18,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993253255] [2021-06-05 05:55:18,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:18,736 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:55:18,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:19,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:55:19,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:19,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:19,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:19,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:55:19,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:19,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:19,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:55:19,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:55:19,248 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:19,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993253255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:19,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:19,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:55:19,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228980877] [2021-06-05 05:55:19,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:55:19,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:19,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:55:19,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:55:19,249 INFO L87 Difference]: Start difference. First operand 2045 states and 4184 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:23,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:23,268 INFO L93 Difference]: Finished difference Result 2498 states and 5061 transitions. [2021-06-05 05:55:23,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 05:55:23,269 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:55:23,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:23,271 INFO L225 Difference]: With dead ends: 2498 [2021-06-05 05:55:23,271 INFO L226 Difference]: Without dead ends: 2426 [2021-06-05 05:55:23,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3091 ImplicationChecksByTransitivity, 2816.0ms TimeCoverageRelationStatistics Valid=770, Invalid=9942, Unknown=0, NotChecked=0, Total=10712 [2021-06-05 05:55:23,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-06-05 05:55:23,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 2036. [2021-06-05 05:55:23,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 2035 states have (on average 2.0466830466830466) internal successors, (4165), 2035 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:23,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 4165 transitions. [2021-06-05 05:55:23,287 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 4165 transitions. Word has length 40 [2021-06-05 05:55:23,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:23,287 INFO L482 AbstractCegarLoop]: Abstraction has 2036 states and 4165 transitions. [2021-06-05 05:55:23,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:23,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 4165 transitions. [2021-06-05 05:55:23,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:55:23,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:23,289 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:23,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 05:55:23,489 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:23,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:23,489 INFO L82 PathProgramCache]: Analyzing trace with hash 807318869, now seen corresponding path program 284 times [2021-06-05 05:55:23,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:23,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050518619] [2021-06-05 05:55:23,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:23,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:23,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050518619] [2021-06-05 05:55:23,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050518619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:23,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278571238] [2021-06-05 05:55:23,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:23,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:55:23,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:23,839 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:55:23,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:24,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:24,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:24,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:24,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:24,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:24,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:55:24,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:55:24,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:24,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:24,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:55:24,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-06-05 05:55:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:24,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278571238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:24,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:24,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:55:24,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400990089] [2021-06-05 05:55:24,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:55:24,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:24,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:55:24,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:55:24,438 INFO L87 Difference]: Start difference. First operand 2036 states and 4165 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:26,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:26,270 INFO L93 Difference]: Finished difference Result 2229 states and 4520 transitions. [2021-06-05 05:55:26,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:55:26,270 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:55:26,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:26,272 INFO L225 Difference]: With dead ends: 2229 [2021-06-05 05:55:26,272 INFO L226 Difference]: Without dead ends: 2173 [2021-06-05 05:55:26,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1749.0ms TimeCoverageRelationStatistics Valid=340, Invalid=4630, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:55:26,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2173 states. [2021-06-05 05:55:26,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2173 to 2033. [2021-06-05 05:55:26,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 2.046751968503937) internal successors, (4159), 2032 states have internal predecessors, (4159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 4159 transitions. [2021-06-05 05:55:26,287 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 4159 transitions. Word has length 40 [2021-06-05 05:55:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:26,287 INFO L482 AbstractCegarLoop]: Abstraction has 2033 states and 4159 transitions. [2021-06-05 05:55:26,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:26,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 4159 transitions. [2021-06-05 05:55:26,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:55:26,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:26,289 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:26,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 289 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 05:55:26,490 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:26,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:26,490 INFO L82 PathProgramCache]: Analyzing trace with hash -291717433, now seen corresponding path program 285 times [2021-06-05 05:55:26,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:26,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454610725] [2021-06-05 05:55:26,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:26,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:26,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454610725] [2021-06-05 05:55:26,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454610725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:26,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771943821] [2021-06-05 05:55:26,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:26,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:55:26,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:26,902 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:55:26,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:27,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:27,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:27,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:27,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:55:27,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:27,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:55:27,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:27,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:27,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:55:27,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:55:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:27,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771943821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:27,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:27,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:55:27,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785739632] [2021-06-05 05:55:27,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:55:27,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:27,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:55:27,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1296, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:55:27,433 INFO L87 Difference]: Start difference. First operand 2033 states and 4159 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:29,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:29,575 INFO L93 Difference]: Finished difference Result 2311 states and 4683 transitions. [2021-06-05 05:55:29,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:55:29,576 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:55:29,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:29,577 INFO L225 Difference]: With dead ends: 2311 [2021-06-05 05:55:29,577 INFO L226 Difference]: Without dead ends: 2215 [2021-06-05 05:55:29,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 1926.4ms TimeCoverageRelationStatistics Valid=400, Invalid=5300, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 05:55:29,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2021-06-05 05:55:29,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2072. [2021-06-05 05:55:29,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.049734427812651) internal successors, (4245), 2071 states have internal predecessors, (4245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:29,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 4245 transitions. [2021-06-05 05:55:29,594 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 4245 transitions. Word has length 40 [2021-06-05 05:55:29,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:29,594 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 4245 transitions. [2021-06-05 05:55:29,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:29,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 4245 transitions. [2021-06-05 05:55:29,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:55:29,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:29,596 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:29,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-05 05:55:29,799 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:29,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:29,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1093905157, now seen corresponding path program 286 times [2021-06-05 05:55:29,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:29,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639601912] [2021-06-05 05:55:29,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:30,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:30,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639601912] [2021-06-05 05:55:30,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639601912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:30,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276145462] [2021-06-05 05:55:30,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:30,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:55:30,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:30,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:55:30,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:30,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:30,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:30,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:30,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:30,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:30,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:55:30,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:55:30,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:30,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:30,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:55:30,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:55:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:30,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276145462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:30,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:30,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:55:30,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505255021] [2021-06-05 05:55:30,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:55:30,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:30,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:55:30,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:55:30,693 INFO L87 Difference]: Start difference. First operand 2072 states and 4245 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:33,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:33,063 INFO L93 Difference]: Finished difference Result 2376 states and 4823 transitions. [2021-06-05 05:55:33,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:55:33,063 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:55:33,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:33,065 INFO L225 Difference]: With dead ends: 2376 [2021-06-05 05:55:33,065 INFO L226 Difference]: Without dead ends: 2288 [2021-06-05 05:55:33,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 1980.9ms TimeCoverageRelationStatistics Valid=433, Invalid=5573, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 05:55:33,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2288 states. [2021-06-05 05:55:33,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2288 to 2072. [2021-06-05 05:55:33,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.049734427812651) internal successors, (4245), 2071 states have internal predecessors, (4245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:33,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 4245 transitions. [2021-06-05 05:55:33,081 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 4245 transitions. Word has length 40 [2021-06-05 05:55:33,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:33,081 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 4245 transitions. [2021-06-05 05:55:33,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:33,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 4245 transitions. [2021-06-05 05:55:33,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:55:33,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:33,083 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:33,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:33,284 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:33,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:33,284 INFO L82 PathProgramCache]: Analyzing trace with hash 452794567, now seen corresponding path program 287 times [2021-06-05 05:55:33,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:33,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530259352] [2021-06-05 05:55:33,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:33,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:33,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530259352] [2021-06-05 05:55:33,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530259352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:33,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200358234] [2021-06-05 05:55:33,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:33,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:55:33,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:33,677 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:55:33,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:34,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:34,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:34,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:55:34,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:34,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:55:34,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:34,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:34,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:55:34,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:55:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:34,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200358234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:34,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:34,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2021-06-05 05:55:34,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603517199] [2021-06-05 05:55:34,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 05:55:34,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:34,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 05:55:34,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1421, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:55:34,227 INFO L87 Difference]: Start difference. First operand 2072 states and 4245 transitions. Second operand has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:36,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:36,824 INFO L93 Difference]: Finished difference Result 2384 states and 4839 transitions. [2021-06-05 05:55:36,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 05:55:36,824 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:55:36,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:36,826 INFO L225 Difference]: With dead ends: 2384 [2021-06-05 05:55:36,826 INFO L226 Difference]: Without dead ends: 2320 [2021-06-05 05:55:36,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2008 ImplicationChecksByTransitivity, 2146.9ms TimeCoverageRelationStatistics Valid=565, Invalid=6575, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 05:55:36,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-06-05 05:55:36,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 2076. [2021-06-05 05:55:36,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 2.0496385542168674) internal successors, (4253), 2075 states have internal predecessors, (4253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:36,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 4253 transitions. [2021-06-05 05:55:36,843 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 4253 transitions. Word has length 40 [2021-06-05 05:55:36,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:36,843 INFO L482 AbstractCegarLoop]: Abstraction has 2076 states and 4253 transitions. [2021-06-05 05:55:36,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.75) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:36,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 4253 transitions. [2021-06-05 05:55:36,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:55:36,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:36,845 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:37,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-05 05:55:37,045 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:37,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:37,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1879036933, now seen corresponding path program 288 times [2021-06-05 05:55:37,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:37,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063330916] [2021-06-05 05:55:37,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:37,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:37,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063330916] [2021-06-05 05:55:37,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063330916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:37,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711141416] [2021-06-05 05:55:37,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:37,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:55:37,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:37,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:55:37,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:37,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:37,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:37,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:37,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:55:37,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:37,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:55:37,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:37,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:37,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:55:37,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:55:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:37,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711141416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:37,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:37,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:55:37,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620862752] [2021-06-05 05:55:37,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:55:37,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:37,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:55:37,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1284, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:55:37,883 INFO L87 Difference]: Start difference. First operand 2076 states and 4253 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:41,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:41,065 INFO L93 Difference]: Finished difference Result 2500 states and 5065 transitions. [2021-06-05 05:55:41,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:55:41,065 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:55:41,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:41,067 INFO L225 Difference]: With dead ends: 2500 [2021-06-05 05:55:41,067 INFO L226 Difference]: Without dead ends: 2416 [2021-06-05 05:55:41,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2693 ImplicationChecksByTransitivity, 2437.6ms TimeCoverageRelationStatistics Valid=712, Invalid=8600, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 05:55:41,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-06-05 05:55:41,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2070. [2021-06-05 05:55:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 2069 states have (on average 2.0492991783470274) internal successors, (4240), 2069 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 4240 transitions. [2021-06-05 05:55:41,083 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 4240 transitions. Word has length 40 [2021-06-05 05:55:41,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:41,084 INFO L482 AbstractCegarLoop]: Abstraction has 2070 states and 4240 transitions. [2021-06-05 05:55:41,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:41,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 4240 transitions. [2021-06-05 05:55:41,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:55:41,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:41,085 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:41,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:41,286 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:41,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:41,286 INFO L82 PathProgramCache]: Analyzing trace with hash 964404187, now seen corresponding path program 289 times [2021-06-05 05:55:41,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:41,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506447195] [2021-06-05 05:55:41,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:41,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:41,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506447195] [2021-06-05 05:55:41,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506447195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:41,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773969911] [2021-06-05 05:55:41,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:41,659 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:55:41,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:41,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:41,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:41,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:41,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:41,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:41,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:55:41,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:55:41,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:41,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:41,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:55:41,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-06-05 05:55:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:42,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773969911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:42,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:42,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:55:42,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642430690] [2021-06-05 05:55:42,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:55:42,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:42,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:55:42,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:55:42,156 INFO L87 Difference]: Start difference. First operand 2070 states and 4240 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:44,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:44,013 INFO L93 Difference]: Finished difference Result 2283 states and 4632 transitions. [2021-06-05 05:55:44,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:55:44,013 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:55:44,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:44,020 INFO L225 Difference]: With dead ends: 2283 [2021-06-05 05:55:44,021 INFO L226 Difference]: Without dead ends: 2227 [2021-06-05 05:55:44,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1711.1ms TimeCoverageRelationStatistics Valid=382, Invalid=5168, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:55:44,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2227 states. [2021-06-05 05:55:44,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2227 to 2072. [2021-06-05 05:55:44,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.049734427812651) internal successors, (4245), 2071 states have internal predecessors, (4245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:44,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 4245 transitions. [2021-06-05 05:55:44,036 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 4245 transitions. Word has length 40 [2021-06-05 05:55:44,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:44,037 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 4245 transitions. [2021-06-05 05:55:44,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:44,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 4245 transitions. [2021-06-05 05:55:44,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:55:44,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:44,038 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:44,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:44,241 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:44,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:44,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1252702705, now seen corresponding path program 290 times [2021-06-05 05:55:44,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:44,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825714544] [2021-06-05 05:55:44,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:44,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:44,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825714544] [2021-06-05 05:55:44,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825714544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:44,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564253099] [2021-06-05 05:55:44,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:44,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:55:44,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:44,611 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:55:44,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:45,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:45,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:45,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:45,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:45,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:45,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:55:45,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:55:45,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:45,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:45,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:55:45,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:55:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:45,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564253099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:45,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:45,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:55:45,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425115497] [2021-06-05 05:55:45,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:55:45,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:45,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:55:45,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1307, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:55:45,167 INFO L87 Difference]: Start difference. First operand 2072 states and 4245 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:48,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:48,244 INFO L93 Difference]: Finished difference Result 2384 states and 4833 transitions. [2021-06-05 05:55:48,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 05:55:48,244 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:55:48,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:48,246 INFO L225 Difference]: With dead ends: 2384 [2021-06-05 05:55:48,246 INFO L226 Difference]: Without dead ends: 2264 [2021-06-05 05:55:48,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2332 ImplicationChecksByTransitivity, 2635.9ms TimeCoverageRelationStatistics Valid=558, Invalid=8184, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 05:55:48,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-05 05:55:48,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2115. [2021-06-05 05:55:48,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 2114 states have (on average 2.052507095553453) internal successors, (4339), 2114 states have internal predecessors, (4339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:48,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 4339 transitions. [2021-06-05 05:55:48,263 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 4339 transitions. Word has length 40 [2021-06-05 05:55:48,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:48,263 INFO L482 AbstractCegarLoop]: Abstraction has 2115 states and 4339 transitions. [2021-06-05 05:55:48,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:48,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 4339 transitions. [2021-06-05 05:55:48,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:55:48,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:48,265 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:48,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:48,465 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:48,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:48,465 INFO L82 PathProgramCache]: Analyzing trace with hash 581138099, now seen corresponding path program 291 times [2021-06-05 05:55:48,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:48,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550956077] [2021-06-05 05:55:48,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:48,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:48,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550956077] [2021-06-05 05:55:48,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550956077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:48,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048028637] [2021-06-05 05:55:48,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:48,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:55:48,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:48,826 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:55:48,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:49,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:55:49,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:49,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:49,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:49,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:55:49,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:49,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:49,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:55:49,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:55:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:49,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048028637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:49,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:49,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:55:49,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824535830] [2021-06-05 05:55:49,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:55:49,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:49,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:55:49,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1302, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:55:49,355 INFO L87 Difference]: Start difference. First operand 2115 states and 4339 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:52,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:52,856 INFO L93 Difference]: Finished difference Result 2461 states and 5003 transitions. [2021-06-05 05:55:52,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 05:55:52,856 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:55:52,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:52,858 INFO L225 Difference]: With dead ends: 2461 [2021-06-05 05:55:52,858 INFO L226 Difference]: Without dead ends: 2349 [2021-06-05 05:55:52,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3009 ImplicationChecksByTransitivity, 2838.2ms TimeCoverageRelationStatistics Valid=692, Invalid=9814, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 05:55:52,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2021-06-05 05:55:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 2123. [2021-06-05 05:55:52,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 2.0523091423185673) internal successors, (4355), 2122 states have internal predecessors, (4355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:52,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 4355 transitions. [2021-06-05 05:55:52,875 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 4355 transitions. Word has length 40 [2021-06-05 05:55:52,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:52,875 INFO L482 AbstractCegarLoop]: Abstraction has 2123 states and 4355 transitions. [2021-06-05 05:55:52,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:52,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 4355 transitions. [2021-06-05 05:55:52,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:55:52,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:52,876 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:53,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:53,077 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:53,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:53,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1966760689, now seen corresponding path program 292 times [2021-06-05 05:55:53,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:53,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056792338] [2021-06-05 05:55:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:53,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:53,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056792338] [2021-06-05 05:55:53,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056792338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:53,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175940352] [2021-06-05 05:55:53,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:53,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:55:53,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:53,429 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:55:53,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:53,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:53,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:53,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:53,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:53,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:53,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:55:53,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:55:53,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:53,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:53,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:55:53,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:55:53,946 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:53,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175940352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:53,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:53,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:55:53,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673826297] [2021-06-05 05:55:53,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:55:53,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:53,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:55:53,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:55:53,947 INFO L87 Difference]: Start difference. First operand 2123 states and 4355 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:57,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:57,724 INFO L93 Difference]: Finished difference Result 2449 states and 4982 transitions. [2021-06-05 05:55:57,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 05:55:57,724 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:55:57,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:57,726 INFO L225 Difference]: With dead ends: 2449 [2021-06-05 05:55:57,726 INFO L226 Difference]: Without dead ends: 2361 [2021-06-05 05:55:57,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2970 ImplicationChecksByTransitivity, 2919.2ms TimeCoverageRelationStatistics Valid=718, Invalid=9788, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 05:55:57,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-06-05 05:55:57,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2126. [2021-06-05 05:55:57,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 2.052235294117647) internal successors, (4361), 2125 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:57,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 4361 transitions. [2021-06-05 05:55:57,743 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 4361 transitions. Word has length 40 [2021-06-05 05:55:57,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:57,743 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 4361 transitions. [2021-06-05 05:55:57,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:57,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 4361 transitions. [2021-06-05 05:55:57,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:55:57,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:57,744 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:55:57,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 05:55:57,945 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:57,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:57,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1325650099, now seen corresponding path program 293 times [2021-06-05 05:55:57,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:57,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206707012] [2021-06-05 05:55:57,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:58,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:58,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206707012] [2021-06-05 05:55:58,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206707012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:58,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998715063] [2021-06-05 05:55:58,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:58,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:55:58,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:58,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:55:58,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:58,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:58,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:55:58,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:58,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:58,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 05:55:58,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:58,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:58,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:55:58,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-06-05 05:55:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:58,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998715063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:58,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:58,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:55:58,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811078648] [2021-06-05 05:55:58,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:55:58,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:58,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:55:58,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:55:58,803 INFO L87 Difference]: Start difference. First operand 2126 states and 4361 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:02,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:02,299 INFO L93 Difference]: Finished difference Result 2473 states and 5035 transitions. [2021-06-05 05:56:02,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 05:56:02,299 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:56:02,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:02,301 INFO L225 Difference]: With dead ends: 2473 [2021-06-05 05:56:02,301 INFO L226 Difference]: Without dead ends: 2409 [2021-06-05 05:56:02,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3099 ImplicationChecksByTransitivity, 2809.8ms TimeCoverageRelationStatistics Valid=782, Invalid=9930, Unknown=0, NotChecked=0, Total=10712 [2021-06-05 05:56:02,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2021-06-05 05:56:02,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 2127. [2021-06-05 05:56:02,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2127 states, 2126 states have (on average 2.0522107243650045) internal successors, (4363), 2126 states have internal predecessors, (4363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:02,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2127 states to 2127 states and 4363 transitions. [2021-06-05 05:56:02,318 INFO L78 Accepts]: Start accepts. Automaton has 2127 states and 4363 transitions. Word has length 40 [2021-06-05 05:56:02,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:02,318 INFO L482 AbstractCegarLoop]: Abstraction has 2127 states and 4363 transitions. [2021-06-05 05:56:02,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:02,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2127 states and 4363 transitions. [2021-06-05 05:56:02,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:56:02,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:02,319 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:56:02,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 05:56:02,520 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:02,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:02,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1543074831, now seen corresponding path program 294 times [2021-06-05 05:56:02,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:02,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445936015] [2021-06-05 05:56:02,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:02,844 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:02,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:02,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445936015] [2021-06-05 05:56:02,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445936015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:02,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107775287] [2021-06-05 05:56:02,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:02,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:56:02,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:02,867 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:56:02,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:03,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:03,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:03,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:03,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:03,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:03,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:03,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2021-06-05 05:56:03,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:03,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:03,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:56:03,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:25 [2021-06-05 05:56:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:03,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107775287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:03,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:03,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 41 [2021-06-05 05:56:03,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131604275] [2021-06-05 05:56:03,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 05:56:03,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:03,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 05:56:03,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1604, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:56:03,560 INFO L87 Difference]: Start difference. First operand 2127 states and 4363 transitions. Second operand has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:07,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:07,905 INFO L93 Difference]: Finished difference Result 2604 states and 5290 transitions. [2021-06-05 05:56:07,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 05:56:07,905 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:56:07,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:07,907 INFO L225 Difference]: With dead ends: 2604 [2021-06-05 05:56:07,907 INFO L226 Difference]: Without dead ends: 2527 [2021-06-05 05:56:07,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3411 ImplicationChecksByTransitivity, 3436.2ms TimeCoverageRelationStatistics Valid=850, Invalid=12032, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 05:56:07,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-06-05 05:56:07,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 2141. [2021-06-05 05:56:07,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2140 states have (on average 2.053271028037383) internal successors, (4394), 2140 states have internal predecessors, (4394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:07,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 4394 transitions. [2021-06-05 05:56:07,926 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 4394 transitions. Word has length 40 [2021-06-05 05:56:07,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:07,926 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 4394 transitions. [2021-06-05 05:56:07,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:07,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 4394 transitions. [2021-06-05 05:56:07,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:56:07,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:07,928 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:56:08,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 05:56:08,128 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:08,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:08,128 INFO L82 PathProgramCache]: Analyzing trace with hash -344020265, now seen corresponding path program 295 times [2021-06-05 05:56:08,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:08,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453401177] [2021-06-05 05:56:08,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:08,454 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:08,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:08,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453401177] [2021-06-05 05:56:08,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453401177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:08,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218970969] [2021-06-05 05:56:08,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:08,476 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:56:08,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:08,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:08,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:08,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:08,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:08,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:08,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:56:08,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:56:08,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:08,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:08,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:56:08,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 05:56:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:09,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218970969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:09,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:09,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:56:09,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129046577] [2021-06-05 05:56:09,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:56:09,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:09,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:56:09,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1302, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:56:09,025 INFO L87 Difference]: Start difference. First operand 2141 states and 4394 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:11,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:11,175 INFO L93 Difference]: Finished difference Result 2392 states and 4866 transitions. [2021-06-05 05:56:11,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:56:11,176 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 05:56:11,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:11,177 INFO L225 Difference]: With dead ends: 2392 [2021-06-05 05:56:11,177 INFO L226 Difference]: Without dead ends: 2307 [2021-06-05 05:56:11,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 1842.7ms TimeCoverageRelationStatistics Valid=375, Invalid=5027, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:56:11,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2021-06-05 05:56:11,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 2179. [2021-06-05 05:56:11,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2179 states, 2178 states have (on average 2.054637281910009) internal successors, (4475), 2178 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:11,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 4475 transitions. [2021-06-05 05:56:11,194 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 4475 transitions. Word has length 40 [2021-06-05 05:56:11,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:11,194 INFO L482 AbstractCegarLoop]: Abstraction has 2179 states and 4475 transitions. [2021-06-05 05:56:11,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:11,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 4475 transitions. [2021-06-05 05:56:11,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 05:56:11,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:11,196 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:56:11,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-05 05:56:11,396 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:11,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:11,396 INFO L82 PathProgramCache]: Analyzing trace with hash -985130855, now seen corresponding path program 296 times [2021-06-05 05:56:11,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:11,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666941139] [2021-06-05 05:56:11,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:11,717 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:11,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:11,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666941139] [2021-06-05 05:56:11,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666941139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:11,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873679658] [2021-06-05 05:56:11,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:11,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:56:11,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:11,740 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:56:11,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:12,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:12,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:12,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:12,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:12,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:12,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:56:12,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 05:56:12,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:12,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:12,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:56:12,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 Received shutdown request... [2021-06-05 05:56:12,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:12,356 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 05:56:12,357 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 05:56:12,359 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 05:56:12,359 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:56:12 BasicIcfg [2021-06-05 05:56:12,359 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 05:56:12,360 INFO L168 Benchmark]: Toolchain (without parser) took 790187.31 ms. Allocated memory was 346.0 MB in the beginning and 499.1 MB in the end (delta: 153.1 MB). Free memory was 325.6 MB in the beginning and 444.3 MB in the end (delta: -118.7 MB). Peak memory consumption was 37.4 MB. Max. memory is 16.0 GB. [2021-06-05 05:56:12,360 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 346.0 MB. Free memory is still 326.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:56:12,360 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.64 ms. Allocated memory is still 346.0 MB. Free memory was 325.4 MB in the beginning and 324.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:56:12,360 INFO L168 Benchmark]: Boogie Preprocessor took 10.76 ms. Allocated memory is still 346.0 MB. Free memory was 324.1 MB in the beginning and 323.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:56:12,360 INFO L168 Benchmark]: RCFGBuilder took 182.73 ms. Allocated memory is still 346.0 MB. Free memory was 323.1 MB in the beginning and 310.5 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 05:56:12,360 INFO L168 Benchmark]: TraceAbstraction took 789959.66 ms. Allocated memory was 346.0 MB in the beginning and 499.1 MB in the end (delta: 153.1 MB). Free memory was 310.1 MB in the beginning and 444.3 MB in the end (delta: -134.2 MB). Peak memory consumption was 20.6 MB. Max. memory is 16.0 GB. [2021-06-05 05:56:12,360 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 346.0 MB. Free memory is still 326.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.64 ms. Allocated memory is still 346.0 MB. Free memory was 325.4 MB in the beginning and 324.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.76 ms. Allocated memory is still 346.0 MB. Free memory was 324.1 MB in the beginning and 323.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 182.73 ms. Allocated memory is still 346.0 MB. Free memory was 323.1 MB in the beginning and 310.5 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 789959.66 ms. Allocated memory was 346.0 MB in the beginning and 499.1 MB in the end (delta: 153.1 MB). Free memory was 310.1 MB in the beginning and 444.3 MB in the end (delta: -134.2 MB). Peak memory consumption was 20.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 41 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 34 known predicates. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 41 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 34 known predicates. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 41 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 34 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 42 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 789902.1ms, OverallIterations: 302, TraceHistogramMax: 4, EmptinessCheckTime: 313.0ms, AutomataDifference: 511835.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 15952 SDtfs, 50096 SDslu, 241597 SDs, 0 SdLazy, 591033 SolverSat, 25824 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 191628.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26625 GetRequests, 6338 SyntacticMatches, 976 SemanticMatches, 19311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368996 ImplicationChecksByTransitivity, 438676.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2179occurred in iteration=301, InterpolantAutomatonStates: 14164, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3286.9ms AutomataMinimizationTime, 301 MinimizatonAttempts, 53884 StatesRemovedByMinimization, 299 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 836.0ms SsaConstructionTime, 2870.1ms SatisfiabilityAnalysisTime, 203507.5ms InterpolantComputationTime, 21518 NumberOfCodeBlocks, 21518 NumberOfCodeBlocksAsserted, 1023 NumberOfCheckSat, 20918 ConstructedInterpolants, 1803 QuantifiedInterpolants, 396303 SizeOfPredicates, 2714 NumberOfNonLiveVariables, 23827 ConjunctsInSsa, 11534 ConjunctsInUnsatCore, 600 InterpolantComputations, 3 PerfectInterpolantSequences, 105/17395 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown